Publications by authors named "Jiyang Wang"

155 Publications

Na(IO)(SO): the first noncentrosymmetric alkaline-metal iodate-sulfate with isolated [IO] and [SO] units.

Chem Commun (Camb) 2021 Sep 21;57(75):9598-9601. Epub 2021 Sep 21.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Metal iodates are of current research interest because of their potential application as nonlinear optical crystals but the exploration of new iodates is mainly concentrated on complex cation iodates. In contrast, iodates with multiple anion groups are rarely reported. In this communication, the first noncentrosymmetric alkaline-metal iodate-sulfate, Na(IO)(SO) has been designed, synthesized and characterized.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d1cc03483aDOI Listing
September 2021

A bacterial kinase phosphorylates OSK1 to suppress stomatal immunity in rice.

Nat Commun 2021 Sep 16;12(1):5479. Epub 2021 Sep 16.

Department of Plant Pathology, the Ministry of Agriculture Key Laboratory of Pest Monitoring and Green Management, and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, China Agricultural University, Beijing, China.

The Xanthomonas outer protein C2 (XopC2) family of bacterial effectors is widely found in plant pathogens and Legionella species. However, the biochemical activity and host targets of these effectors remain enigmatic. Here we show that ectopic expression of XopC2 promotes jasmonate signaling and stomatal opening in transgenic rice plants, which are more susceptible to Xanthomonas oryzae pv. oryzicola infection. Guided by these phenotypes, we discover that XopC2 represents a family of atypical kinases that specifically phosphorylate OSK1, a universal adaptor protein of the Skp1-Cullin-F-box ubiquitin ligase complexes. Intriguingly, OSK1 phosphorylation at Ser by XopC2 exclusively increases the binding affinity of OSK1 to the jasmonate receptor OsCOI1b, and specifically enhances the ubiquitination and degradation of JAZ transcription repressors and plant disease susceptibility through inhibiting stomatal immunity. These results define XopC2 as a prototypic member of a family of pathogenic effector kinases and highlight a smart molecular mechanism to activate jasmonate signaling.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41467-021-25748-4DOI Listing
September 2021

LaTeBO: a new borotellurite with a large birefringence activated by the highly distorted [TeO] group.

Dalton Trans 2021 Sep 21;50(36):12404-12407. Epub 2021 Sep 21.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystals, Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.

A new borotellurite, LaTeBO, containing the highly distorted [TeO] group has been synthesized. Interestingly, it exhibits a wide ultraviolet transmittance range and large birefringence ([email protected] nm). The response electron distribution anisotropy approximation and dipole moment calculation demonstrate that the synergistic effect of the highly asymmetric [TeO] and BO groups is conducive to its large birefringence.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d1dt01639cDOI Listing
September 2021

Self-mode-locked alexandrite femtosecond lasers with multi-GHz repetition rates.

Opt Lett 2021 Apr;46(8):1979-1982

We report the laser-diode pumped multi-gigahertz (GHz) self-mode-locked alexandrite femtosecond (fs) lasers for the first time, to the best of our knowledge. Using a simple linear cavity, stable mode-locked laser was achieved with a repetition rate of 3.6 GHz and a pulse width of 237 fs. Additionally, the second-harmonic mode-locked pulse was realized with a repetition rate of 7.5 GHz and a pulse width of 201 fs based on the Fabry-Perot effect generated in the laser cavity. It was observed that this laser possesses advantages of high repetition rate and short pulse width that enable the development of promising applications in modern ultrafast photonics.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.423249DOI Listing
April 2021

Mid-infrared pulsed nanosecond difference frequency generation of oxide LGN crystal up to 5.7 µm.

Opt Lett 2021 Feb;46(4):785-788

We demonstrate the tunable difference frequency generation (DFG) of an oxide (LGN) crystal pumped by near-infrared lasers with nanosecond pulses for the first time to our knowledge. The type I and II phase-matching conditions of DFG were calculated in the mid-infrared region. With the processed LGN crystals, tunable lasers in the wavelength range from 4.4 to 5.7 µm and 4.56 to 5.6 µm were achieved under type II and I phase-matching conditions, respectively, with the maximum output energy of 13.1 µJ, which agreed well with the theoretical calculation. This work provides the kind of promising mid-infrared nonlinear crystals for the pumping of nanosecond pulsed lasers as well as a tunable mid-infrared laser source at a wavelength over 5 µm in further photonic applications.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.418215DOI Listing
February 2021

Intriguing Dimensional Transition Inducing Variable Birefringence in KNaSnS and RbNaSnSe.

Inorg Chem 2021 Jan 23;60(2):1055-1061. Epub 2020 Dec 23.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

The birefringent crystals capable of modulating the polarization of lights are of the current research interests. Although many oxide crystals have been discovered and widely used in UV and visible regions, the birefringent crystals in the infrared (IR) region are still rare. Herein, two new chalcogenides, KNaSnS and RbNaSnSe, have been synthesized by the solid-state method. We have used the single crystal X-ray diffraction to determine their structures. KNaSnS crystallizes in the monoclinic space group 2/ and exhibits a three-dimensional framework constructed by the corner-sharing SnS and SnS units, whereas RbNaSnSe crystallizes in the tetragonal space group 4/ and features a zero-dimensional [SnSe] trimer built by the three edge-sharing SnSe tetrahedra. The physical property measurements indicate that RbNaSnSe has a wide IR transparent window up to 20 μm and large birefringence, ∼0.196, suggesting its potential application as a birefringent crystal in the IR region. However, compared with RbNaSnSe, the birefringence of KNaSnS is relatively small, ∼0.070. The study of their structure-property relationship indicates that the different connection modes of SnQ (Q = S, Se; = 4, 5) polyhedra are the main reason for the large difference of birefringence between the two compounds. These studies will provide a new insight for the origin of birefringence and will facilitate the exploration of new IR birefringent crystals.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.0c03170DOI Listing
January 2021

Two VOZ transcription factors link an E3 ligase and an NLR immune receptor to modulate immunity in rice.

Mol Plant 2021 02 10;14(2):253-266. Epub 2020 Nov 10.

Department of Plant Pathology, Ohio State University, Columbus, OH 43210, USA. Electronic address:

Nucleotide-binding leucine-rich repeat (NLR) proteins play critical roles in plant immunity. However, how NLRs are regulated and activate defense signaling is not fully understood. The rice (Oryza sativa) NLR receptor Piz-t confers broad-spectrum resistance to the fungal pathogen Magnaporthe oryzae and the RING-type E3 ligase AVRPIZ-T INTERACTING PROTEIN 10 (APIP10) negatively regulates Piz-t accumulation. In this study, we found that APIP10 interacts with two rice transcription factors, VASCULAR PLANT ONE-ZINC FINGER 1 (OsVOZ1) and OsVOZ2, and promotes their degradation through the 26S proteasome pathway. OsVOZ1 displays transcriptional repression activity while OsVOZ2 confers transcriptional activation activity in planta. The osvoz1 and osvoz2 single mutants display modest but opposite M. oryzae resistance in the non-Piz-t background. However, the osvoz1 osvoz2 double mutant exhibits strong dwarfism and cell death, and silencing of both genes via RNA interference also leads to dwarfism, mild cell death, and enhanced resistance to M. oryzae in the non-Piz-t background. Both OsVOZ1 and OsVOZ2 interact with Piz-t. Double silencing of OsVOZ1 and OsVOZ2 in the Piz-t background decreases Piz-t protein accumulation and transcription, reactive oxygen species-dependent cell death, and resistance to M. oryzae containing AvrPiz-t. Taken together, these results indicate that OsVOZ1 and OsVOZ2 negatively regulate basal defense but contribute positively to Piz-t-mediated immunity.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.molp.2020.11.005DOI Listing
February 2021

Synthesis, Structure, and Characterization of Transition-Metal Iodate: BaTi(IO)·0.5HO.

Inorg Chem 2020 Oct 4;59(20):15430-15437. Epub 2020 Oct 4.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

A new noncentrosymmetric (NCS) transition-metal (TM) iodate BaTi(IO)·0.5HO has been successfully synthesized by the typical hydrothermal method. The single-crystal X-ray diffraction shows that BaTi(IO)·0.5HO crystallizes in the polar trigonal space group 3 (no. 146) with = = 11.1920(12) Å, = 24.006(3) Å. The reported compound features zero-dimensional (0D) [Ti(IO)] clusters that are separated by Ba cations and bound water in the structure. By comparing BaTi(IO)·0.5HO with the centrosymmetric (CS) α- and β-BaTi(IO) that were reported before, it can be found that the bound water plays an important role for the formation of NCS structure for BaTi(IO)·0.5HO. In addition, based on the powder second harmonic (SHG) measurement, BaTi(IO)·0.5HO can achieve type-I phase matching with a moderate SHG effect (∼1 × KDP). The source of SHG effect was analyzed by dipole moment calculation and structure comparison. UV-vis-NIR diffuse reflectance spectroscopy, infrared spectroscopy, and thermogravimetric measurements are also presented.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.0c02426DOI Listing
October 2020

LiCaBOF: a unique sandwich-like structure with diverse and wide Li ion diffusion pathways.

Dalton Trans 2020 Sep;49(35):12184-12188

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

A new borate fluoride, Li3CaB2O5F, has been synthesized. It features a sandwich-like structure with the adjacent [Li3OF]∞ and [CaO]∞ layers connected by the weak Li-O bonds and the [B2O5] dimers. Interestingly, Li3CaB2O5F has large ionic conductivity, which is attributed to the diverse and wide Li-ion diffusion pathways.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0dt02423fDOI Listing
September 2020

High-efficiency Er-doped yttrium gallium garnet laser resonantly pumped by a laser diode at 1.47  µm.

Opt Lett 2020 Aug;45(15):4361-4364

The spectroscopic and laser properties of an -doped yttrium gallium garnet crystal, (YGG), are studied. The stimulated emission cross section is 1.4×10 at 1.65 µm. A continuous-wave laser resonantly pumped by a laser diode at 1.47 µm is demonstrated, delivering a maximum output power of 3.34 W. Benefiting from the low phonon energy of the YGG host, the corresponding slope efficiency is as high as ∼42. To the best of our knowledge, this is the highest slope efficiency from the laser-diode resonantly pumped Er lasers at room temperature in the 1.6 µm spectral range.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.401155DOI Listing
August 2020

Synthesis and characterization of three new rare-earth orthoborates: BaMgY(BO), BaCdY(BO), and BaCdSc(BO).

Dalton Trans 2020 Aug;49(31):10874-10879

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Three rare-earth orthoborates Ba2MgY2(BO3)4, Ba2CdY2(BO3)4, and Ba2CdSc(BO3)3 were synthesized via a high-temperature solution method and their structures were determined by single crystal X-ray diffraction for the first time. Ba2MgY2(BO3)4 and Ba2CdY2(BO3)4 are isostructural and both crystallize in the monoclinic crystal system, P21/c, while Ba2CdSc(BO3)3 crystallizes in the triclinic crystal system, P1[combining macron]. The structures of Ba2MgY2(BO3)4 and Ba2CdY2(BO3)4 can be described as the three-dimensional (3D) frameworks composed of MO5 (M = Mg, Cd), YOn (n = 6, 7) polyhedra with isolated BO3 and Ba2+ cations residing in the space of the frameworks. The structure of Ba2CdSc(BO3)3 is composed of 2D [CdSc(BO3)3]∞ layers separated by Ba2+ cations. In addition, structural comparisons, thermal behaviors, UV-vis-NIR diffuse reflectance spectra, and infrared spectroscopy results are also reported.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0dt01799jDOI Listing
August 2020

CsZn BO X (X =F , Cl , and FCl): A Series of Beryllium-Free Deep-Ultraviolet Nonlinear-Optical Crystals with Excellent Properties.

Angew Chem Int Ed Engl 2020 Oct 24;59(43):19006-19010. Epub 2020 Aug 24.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin, 300384, China.

Designing deep-ultraviolet (DUV) nonlinear-optical (NLO) crystals is one of the major current research interests, but it faces a great challenge. In order to overcome the problem of crystal growth and the toxicity of BeO raw materials in KBe BO F (KBBF), the only applicable DUV NLO crystal so far, we substitute Be cations with Zn in the KBBF structure and modify the halogen anions, by which three new Zn-containing KBBF-like compounds, CsZn BO X (X =F , Cl , and FCl), have been successfully synthesized. They all exhibit excellent NLO properties, including improved SHG responses (2.8-3.5×KDP) and short UV cut-off edges (<190 nm). In comparison with KBBF, CsZn BO X (X =F , Cl , and FCl) are all chemically benign and have better growth habits, so they are all promising as DUV NLO crystals. Further study on structure-property relationships indicates that the mixing of halogen anions is a feasible strategy to enhance the SHG responses of the KBBF family.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/anie.202008346DOI Listing
October 2020

New polymorphism for BaTi(IO) with two polymorphs crystallizing in the same space group.

Dalton Trans 2020 Jul 17;49(25):8443-8447. Epub 2020 Jun 17.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystals, Tianjin University of Technology, Tianjin 300384, China.

Polymorphic α- and β-BaTi(IO) have been synthesized. They crystallize in the same space group and exhibit highly similar structures. But the different powder X-ray patterns and crystal morphologies indicate that they belong to different phases, which represents the first phase transitions with two polymorphs possessing the same space group and similar cells.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0dt00593bDOI Listing
July 2020

Stable Trimetallic NiFeCu Catalysts with High Carbon Resistance for Dry Reforming of Methane.

Chempluschem 2020 Jun;85(6):1120-1128

CAS Key Lab of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P. R. China.

Copper has been incorporated into Ni-Fe alloys to form a series of ternary NiFeCu alloy catalysts with molar ratio of Cu/Fe varying from 0 to 1.5, which were tested in dry reforming of methane (DRM) at 923 K and atmospheric pressure with a CH /CO ratio of 1. XRD, TPR-H and FE-TEM measurements confirm the formation of Ni-Fe-Cu alloys with particle size of 5.0-5.7 nm. The Ni Fe Cu -Mg Al O (2.6 wt% Cu) shows the highest carbon resistance with only 5.0 % carbon by thermogravimetric analysis. Importantly, XPS analyses complemented with XAFS demonstrate that doping an appropriate quantity of Cu to form stable trimetallic alloy enhances the interaction between Ni and Fe, thus inhibiting Fe segregation and reducing carbon deposition. However, doping excessive Cu (3.9 wt%) weakens the Ni-Fe bond, preventing Fe from providing labile oxygen to Ni sites, which is unfavorable for carbon elimination.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/cplu.202000217DOI Listing
June 2020

PbSrSiO: a new ultraviolet nonlinear optical material with a strong second harmonic generation response and moderate birefringence.

Chem Commun (Camb) 2020 Jul 27;56(52):7104-7107. Epub 2020 May 27.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Introduction of Pb cations in silicate systems generates a new compound, PbSrSiO, which exhibits excellent properties, including a strong second harmonic generation response (∼5.8 × KDP), a short UV cut-off edge (240 nm) and moderate birefringence ([email protected] nm). These results suggest that PbSrSiO is a promising UV NLO material.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0cc02123gDOI Listing
July 2020

A fungal effector and a rice NLR protein have antagonistic effects on a Bowman-Birk trypsin inhibitor.

Plant Biotechnol J 2020 11 4;18(11):2354-2363. Epub 2020 Jul 4.

State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.

Bowman-Birk trypsin inhibitors (BBIs) play important roles in animal and plant immunity, but how these protease inhibitors are involved in the immune system remains unclear. Here, we show that the rice (Oryza sativa) BBI protein APIP4 is a common target of a fungal effector and an NLR receptor for innate immunity. APIP4 exhibited trypsin inhibitor activity in vitro and in vivo. Knockout of APIP4 in rice enhanced susceptibility, and overexpression of APIP4 increased resistance to the fungal pathogen Magnaporthe oryzae. The M. oryzae effector AvrPiz-t interacted with APIP4 and suppressed APIP4 trypsin inhibitor activity. By contrast, the rice NLR protein Piz-t interacted with APIP4, enhancing APIP4 transcript and protein levels, and protease inhibitor activity. Our findings reveal a novel host defence mechanism in which a host protease inhibitor targeted by a fungal pathogen is protected by an NLR receptor.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1111/pbi.13400DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7589341PMC
November 2020

BaBOCl and PbBOCl: structural insights into ortho-borates with uncondensed BO tetrahedra.

Chem Commun (Camb) 2020 Jun 30;56(45):6086-6089. Epub 2020 Apr 30.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Two new halogen-rich ortho-borates, BaBOCl and PbBOCl, were synthesized and characterized. Interestingly, PbBOCl contains rare uncondensed BO tetrahedra. The structure analyses indicate that the large cation/boron ratio, the stereochemically active lone pairs on Pb cations and the rich Cl anions play key roles in the formation of the uncondensed BO tetrahedra.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0cc01927eDOI Listing
June 2020

Effect of Mo/P Ratios on Dimensions: Syntheses, Structures, and Properties of Three New Molybdophosphates.

Inorg Chem 2020 Apr 3;59(8):5742-5750. Epub 2020 Apr 3.

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.

Mo(VI)-containing phosphates are widely used in catalyses, ion batteries, and nonlinear optical (NLO) crystals. However, few strategies can effectively guide the syntheses of the Mo(VI)-containing phosphates. In this paper, three new Mo(VI)-containing phosphates, CsMoPO, LiK(MoPO), and Sr(MoPO), with different dimensions have been successfully synthesized by adjusting the Mo/P ratios. Interestingly, CsMoPO is a classic Keggin-type polyoxometalate composed of zero-dimensional (0D) [MoPO] clusters, whereas LiK(MoPO) and Sr(MoPO) have three-dimensional (3D) [MoOOP] frameworks consisting of MoO octahedra and PO tetrahedra in a 1/1 ratio. Detailed structural comparisons of Mo(VI)-containig phosphates indicate that the Mo/P ratios have a significant effect on the structural dimensions. Further, the optical properties and thermal stabilities of CsMoPO, LiK(MoPO), and Sr(MoPO) are also determined.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.0c00511DOI Listing
April 2020

RbWO: An Excellent Mid- and Far-IR Nonlinear-Optical Material with a Wide Band Gap.

Inorg Chem 2020 Apr 11;59(7):4601-4607. Epub 2020 Mar 11.

State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.

IR nonlinear-optical (NLO) crystal is the important device in IR laser technology. Nevertheless, the application of most IR NLO crystals in high-power lasers is always limited by the low laser damage threshold (LDT), which is mainly caused by the narrow optical band gap (). Here, the physical properties of the RbWO (RWO) crystal with a longer absorption cutoff edge and a wide were systematically studied for the first time. A preliminary measurement of the LDT was performed, and the result shows that RWO has a high powder LDT of about 42 times that of AgGaS. In order to better understand the relationship between the structure and properties, the dipole moments of WO octahedra were accurately calculated and analyzed. Meanwhile, it was indicated that RWO exhibits an ideal frequency doubling strength with the type I phase matching. Finally, it was revealed that RWO has great application value as an IR NLO crystal.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.inorgchem.9b03711DOI Listing
April 2020

Designing Silicates as Deep-UV Nonlinear Optical (NLO) Materials using Edge-Sharing Tetrahedra.

Angew Chem Int Ed Engl 2020 Jun 24;59(23):8922-8926. Epub 2020 Mar 24.

Department of Chemistry, University of Houston, 112 Fleming Building, Houston, TX, 77204, USA.

Discovering new deep-ultraviolet (DUV) nonlinear optical (NLO) materials is currently a great challenge. The reported DUV NLO materials are almost exclusively borates or phosphates. Silicates-the largest constituent of the earth's crust-are excluded owing to their weak second harmonic generation (SHG) response. We report a silicate, Li BaSiO , with edge-sharing LiO -SiO tetrahedra that achieves the balance between a short UV absorption edge, below 190 nm, and a large SHG response, 2.8×KDP. The SHG intensity is the largest for silicates without second-order Jahn-Teller cations, and exceeds that of non-isomorphic Li SrSiO by more than an order of magnitude. As such Li BaSiO may be seen as a promising DUV-UV NLO material. This research indicates that edge-sharing tetrahedra is a new design parameter for discovering new DUV NLO materials.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/anie.202001855DOI Listing
June 2020

BaFTeF(OH): A UV Nonlinear Optical Fluorotellurite Material Designed by Band-Gap Engineering.

J Am Chem Soc 2020 Mar 2;142(10):4616-4620. Epub 2020 Mar 2.

Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States.

Balancing the wide band gap, large second harmonic generation (SHG) response, and moderate birefringence are significant but addressable challenges for designing nonlinear optical (NLO) materials. Based on the band-gap engineering in perovskite solar cell materials, we have successfully synthesized a new fluorotellurite, BaFTeF(OH), which exhibits a pseudo-Aurivillius structure and crystallizes in a noncentrosymmetric and polar space group 2. The physical property measurements show that this material can effectively balance the requirements among the short UV absorption edge (∼205 nm), large SHG response (∼3 × KDP) and moderate birefringence (∼[email protected] nm) and is a promising ultraviolet NLO crystal.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/jacs.0c00702DOI Listing
March 2020

The essential effector SCRE1 in Ustilaginoidea virens suppresses rice immunity via a small peptide region.

Mol Plant Pathol 2020 04 22;21(4):445-459. Epub 2020 Feb 22.

Department of Plant Pathology and the Ministry of Agriculture Key Laboratory of Pest Monitoring and Green Management, China Agricultural University, Beijing, 100193, China.

The biotrophic fungal pathogen Ustilaginoidea virens causes rice false smut, a newly emerging plant disease that has become epidemic worldwide in recent years. The U. virens genome encodes many putative effector proteins that, based on the study of other pathosystems, could play an essential role in fungal virulence. However, few studies have been reported on virulence functions of individual U. virens effectors. Here, we report our identification and characterization of the secreted cysteine-rich protein SCRE1, which is an essential virulence effector in U. virens. When SCRE1 was heterologously expressed in Magnaporthe oryzae, the protein was secreted and translocated into plant cells during infection. SCRE1 suppresses the immunity-associated hypersensitive response in the nonhost plant Nicotiana benthamiana. Induced expression of SCRE1 in rice also inhibits pattern-triggered immunity and enhances disease susceptibility to rice bacterial and fungal pathogens. The immunosuppressive activity is localized to a small peptide region that contains an important 'cysteine-proline-alanine-arginine-serine' motif. Furthermore, the scre1 knockout mutant generated using the CRISPR/Cas9 system is attenuated in U. virens virulence to rice, which is greatly complemented by the full-length SCRE1 gene. Collectively, this study indicates that the effector SCRE1 is able to inhibit host immunity and is required for full virulence of U. virens.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1111/mpp.12894DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7060142PMC
April 2020

In[BaClF]: a novel infrared-transparent molecular sieve constructed by halides.

Chem Commun (Camb) 2020 Mar;56(22):3297-3300

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystals, Tianjin University of Technology, Tianjin 300384, China.

Molecular sieves are of increasing importance in catalysis, the oil industry, and biomedicine. Traditional molecular sieves are generally oxides that inevitably show some absorption in the mid- and far-IR range due to the vibrations of metal-oxygen bonds, which are unfavorable for the in situ observation of the reactions in molecular sieves through IR techniques. In this study, a new metal halide In[Ba3Cl3F6] has been synthesized. It exhibits a quite transparent window from 0.366 to 22 μm and good adsorption and desorption processes.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0cc00455cDOI Listing
March 2020

A Novel Electrochemical Sensor Based on Electropolymerized Ion Imprinted PoPD/ERGO Composite for Trace Cd(II) Determination in Water.

Sensors (Basel) 2020 Feb 13;20(4). Epub 2020 Feb 13.

Beijing key Laboratory of sensor, Beijing Information Science & Technology University, Beijing 100101, China.

A novel electrochemical sensor based on electropolymerized ion imprinted poly (o-phenylenediamine) PoPD/electrochemical reduced graphene (ERGO) composite on glass carbon electrode (GCE) was fabricated for selective and sensitive determination of trace Cd(II) in water. ERGO was first deposited on the surface of GCE by electrochemical cyclic voltammetry (CV) scanning to enhance the electron transport activity at electrode surface. The ion imprinted polymer (IIP) of imprinted PoPD was then in situ electropolymerized on ERGO via CV scanning with oPD as functional monomer and Cd(II) ions as template, following removal of the template using electrochemical peroxidation method. The obtained imprinted PoPD/RERGO composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray energy spectroscopy (EDS) for the observation of their morphologies and components. The electrochemical behavior of the imprinted PoPD/ERGO/GCE was performed by CV and SWASV. The fabricated sensor of the imprinted PoPD/ERGO/GCE showed a good selectivity toward target Cd(II) ions in the presence of other heavy metal ions. Under the optimized experimental conditions, the sensor exhibited a good linear relationship between SWASV stripping peak values and Cd(II) concentration in the range of 1 to 50 ng/mL, with the limit of detection as 0.13 ng/mL (S/N = 3). The proposed electrochemical sensor of imprinted PoPD/ERGO/GCE was successfully applied for trace Cd(II) determination in real water samples.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3390/s20041004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7070618PMC
February 2020

Defect Engineering of MoS for Room-Temperature Terahertz Photodetection.

ACS Appl Mater Interfaces 2020 Feb 28;12(6):7351-7357. Epub 2020 Jan 28.

State Key Laboratory of Crystal Materials and Institute of Crystal Materials , Shandong University , Jinan 250100 , China.

Two-dimensional (2D) materials have exotic intrinsic electronic band structures and are considered as revolutionary foundations for novel nanodevices. Band engineering of 2D materials may pave a new avenue to overcome numerous challenges in modern technologies, such as room temperature (RT) photodetection of light with photon energy below their band gaps. Here, we reported the pioneering RT MoS-based photodetection in the terahertz (THz) region via introducing Mo and S vacancies for rational band gap engineering. Both the generation and transport of extra carriers, driven by THz electromagnetic radiations, were regulated by the vacancy concentration as well as the resistivity of MoS samples. Utilizing the balance between the carrier concentration fluctuation and carrier-scattering probability, a high RT photoresponsivity of 10 mA/W at 2.52 THz was realized in an Mo-vacancy-rich MoS sample. This work overcomes the challenge in the excessive dark current of RT THz detection and offers a convenient way for further optoelectronic and photonic devices based on band gap-engineered 2D materials.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acsami.9b21671DOI Listing
February 2020

LncRNA MIR4435-2HG-mediated upregulation of TGF-β1 promotes migration and proliferation of nonsmall cell lung cancer cells.

Environ Toxicol 2020 May 25;35(5):582-590. Epub 2019 Dec 25.

Department of Respiratory and Critical Care, Yunnan Second People's Hospital, Kunming City, Yunnan Province, China.

The roles of long noncoding RNAs (lncRNAs) have been shown to play critical roles in tumor progression. Here, it was identified that lncRNA MIR4435-2HG was highly expressed in lung cancer tissues, especially in nonsmall cell lung cancer (NSCLC). A consistent result was obtained in lung cancer cells. Functional experiments showed that knockdown of MIR4435-2HG reduced the proliferation and migration ability of NSCLC cells. Transcriptome-sequencing analysis indicated that TGF-β signaling was mostly enriched in NSCLC cells with MIR4435-2HG knockdown. Furthermore, MIR4435-2HG was identified as an miRNA sponge for TGF-β1 and thus activated TGF-β signaling. Additionally, re-activation of TGF-β1 rescued MIR4435-2HG knockdown-mediated inhibition on the progression of NSCLC cells. Therefore, this work indicates a novel MIR4435-2HG/TGF-β1 axis responsible for NSCLC cell progression.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1002/tox.22893DOI Listing
May 2020

Power scaling of the self-frequency-doubled quasi-two-level Yb:YCOB laser with a 30% slope efficiency.

Opt Lett 2019 Nov;44(21):5157-5160

The lab-on-chip integration of photonic devices has been attracting increasing attention recently. Multifunctional materials provide natural platforms for the desirable performance by the coupling of different functionalities. The insufficient coupling efficiency of the laser and nonlinear processes in self-frequency-doubled (SFD) lasers is the limiting factor for the output power and further practical applications. Here we demonstrate a SFD Yb-doped calcium yttrium oxoborate (Yb:YCOB) crystal laser with an unprecedented slope efficiency of 30% and output power of 6.2 W at 513 nm. The successful realization of this laser operating in a quasi-two-level configuration is based on enhanced coupling of the laser and frequency-doubling processes using a monolithic configuration, benefiting from an ultimately small laser quantum defect, the anisotropic gain cross sections, and the high effective nonlinearity of the monoclinic YCOB outside the principal planes. Solid-state lasers in the spectral range around 510 nm are scarce, and the results not only present a significant advancement in the field of SFD lasers, but also pave the way for future applications of such green lasers, especially in areas such as medical treatment, daily life, and scientific investigations.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.44.005157DOI Listing
November 2019

Artificial Second-Order Nonlinear Optics in a Centrosymmetric Optical Material BiVO: Breaking the Prerequisite for Nonlinear Optical Materials.

ACS Omega 2019 Jan 14;4(1):1045-1052. Epub 2019 Jan 14.

State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China.

Second-order nonlinear optics (NLO) is the foundation of frequency conversion for the generation of coherent light at frequencies where lasers have no emissions or operate poorly. The prerequisite for NLO materials is noncentrosymmetric symmetry that can generate an effectively non-counterbalanced spontaneous electronic polarization. Here, we propose that this material restriction can be broadened by controlling the electron distribution with a local internal electrostatic field (IEF), and we demonstrate artificially created and manipulated second harmonic generation (SHG) in a centrosymmetric optical material, a superimposed Co- and Mo-doped BiVO thin film with 2/ point group symmetry, where a homojunction producing tunable effective polarization is formed. The SHG was characterized and tuned by IEF. This work breaks the structural symmetry constraint on NLO materials. Besides, the phase-matching-like condition was realized for the further improvement of the efficient frequency conversion. Because polarization is also a prerequisite for many other functions besides SHG, we believe that this work should provide some inspiration for the further development of optoelectronic, photonic, and electronic materials.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1021/acsomega.8b02453DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648906PMC
January 2019

High thermoelectric performance of Ag doped SnTe polycrystalline bulks via the synergistic manipulation of electrical and thermal transport.

Phys Chem Chem Phys 2019 Aug;21(32):17978-17984

School of Physics, Shandong University, Jinan, 250100, People's Republic of China.

Ernzerhof (HSE) hybrid functional approximations based on the density functional theory (DFT) method were applied to investigate the electronic band structures of SnTe. First principles calculations indicate that Ag substitution in SnTe could effectively modify the valence band structures and decrease the energy separation between valence bands, ΔEVBL-Σ, which will enhance the Seebeck coefficient. All the fabricated Ag doped SnTe samples show the same crystal structure as cubic SnTe. Compared to the pure SnTe sample, the Ag doped ones exhibit greatly enhanced thermoelectric performance, especially at high temperatures, with the highest figure-of-merit of around 1.35 achieved at 900 K, by concurrent optimization of the electrical and thermal transport properties.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1039/c9cp03534fDOI Listing
August 2019

Kerr-lens mode-locked Pr:LuLiF laser.

Opt Lett 2019 Aug;44(15):3665-3668

We demonstrate the Kerr-lens mode-locked Pr:LuLiF (Pr:LLF) laser pumped by a blue laser diode (LD). By theoretical calculation of the group velocity dispersion in the laser gain, the compensation was employed for the realization of the continuous-wave mode-locked laser at the wavelength of 604 nm with the pulse width of 1.1 ps which, to the best of our knowledge, is the shortest pulse width in the Pr ion doped crystal lasers pumped with LDs. It can be believed that the present Pr:LLF laser should provide some inspiration for the development of the blue LD pumped visible lasers, especially in the mode-locking laser operation.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.44.003665DOI Listing
August 2019
-->