Publications by authors named "Wenxiang Chai"

23 Publications

  • Page 1 of 1

Connexin 43 overexpression induces lung cancer angiogenesis following phosphorylation at Ser279 in its C-terminus.

Oncol Lett 2022 Sep 5;24(3):293. Epub 2022 Jul 5.

Department of Cardio-Thoracic Surgery, Shenzhen University General Hospital, Shenzhen, Guangdong 518055, P.R. China.

Blocking angiogenesis can inhibit tumor growth and metastasis. However, the mechanism underlying regulation of lung cancer angiogenesis remains unclear. The gap junction protein connexin 43 (Cx43) is implicated in angiogenesis. The aim of the present study was to determine the role of Cx43 in angiogenesis and its signaling pathways. Human pulmonary microvascular endothelial cells were transfected with Cx43-targeting siRNA or Cx43-overexpressing recombinant plasmid vector. Reverse transcription-quantitative polymerase chain reaction and western blotting were performed to determine Cx43, zonula occludens-1 (ZO-1), E-cadherin, β-catenin, von Willebrand factor (vWF), and plasminogen activator inhibitor-1 (PAI-1) mRNA and protein expression levels, respectively. Tyr265, Ser279, Ser368, and Ser373 phosphorylation levels in the C-terminus of Cx43 and intracellular and membranal Cx43 contents were determined using western blotting. Additionally, immunofluorescence, tube formation, Cell Counting Kit-8, and Transwell migration assays were performed. The results revealed that compared with that in the control samples, Cx43, ZO-1, E-cadherin, β-catenin, vWF, and PAI-1 mRNA and protein expression were significantly increased in the Cx43 overexpression group and significantly decreased in the Cx43-knockdown group. Moreover, the phosphorylation level of Ser279 as well as cell proliferation and migration rates were markedly increased in the Cx43 overexpression group, and tube formation revealed that the potential of angiogenesis was also increased. Conversely, in the Cx43-knockdown group, the phosphorylation level of Ser279 and cell proliferation and migration rates were reduced, and the potential of angiogenesis was greatly impaired. Under Cx43 overexpression, membranal Cx43 content was significantly increased, whereas under Cx43 knockdown, it was significantly reduced. Therefore, Cx43 overexpression could induce pulmonary angiogenesis by promoting cell proliferation and migration and activating ZO-1, E-cadherin, β-catenin, vWF, and PAI-1. This may be achieved by promoting phosphorylation and activation of the intracellular signal site Ser279 at the C-terminus of Cx43.
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http://dx.doi.org/10.3892/ol.2022.13413DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9353244PMC
September 2022

Connexins and angiogenesis: Functional aspects, pathogenesis, and emerging therapies (Review).

Int J Mol Med 2022 Aug 28;50(2). Epub 2022 Jun 28.

Department of Cardio‑Thoracic Surgery, Shenzhen University General Hospital, Shenzhen, Guangdong 518055, P.R. China.

Connexins (Cxs) play key roles in cellular communication. By facilitating metabolite exchange or interfering with distinct signaling pathways, Cxs affect cell homeostasis, proliferation, and differentiation. Variations in the activity and expression of Cxs have been linked to numerous clinical conditions including carcinomas, cardiac disorders, and wound healing. Recent discoveries on the association between Cxs and angiogenesis have sparked interest in Cx‑mediated angiogenesis due to its essential functions in tissue formation, wound repair, tumor growth, and metastasis. It is now widely recognized that understanding the association between Cxs and angiogenesis may aid in the development of new targeted therapies for angiogenic diseases. The aim of the present review was to provide a comprehensive overview of Cxs and Cx‑mediated angiogenesis, with a focus on therapeutic implications.
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http://dx.doi.org/10.3892/ijmm.2022.5166DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9256078PMC
August 2022

Successful resolution of ectopic Cushing syndrome by minimally invasive thoracoscopic resection of the neuroendocrine tumor of the thymus: a rare case report.

BMC Surg 2022 Jun 11;22(1):226. Epub 2022 Jun 11.

Department of Thoracic Surgery, University Medical Center Mainz, Johannes Gutenberg University Mainz, Mainz, Germany.

Background: Ectopic Cushing syndrome (ECS) is a sporadic condition. Even uncommon is an ECS that derives from a carcinoid tumor of the thymus. These tumors may pose several diagnostic and therapeutic conundrums. This report discusses the differential diagnosis, clinicopathological findings, and effective treatment of a rare case of ECS using a minimally invasive approach.

Case Presentation: A 29-year-old woman with Cushing syndrome presented with facial flushing. Physical examination revealed hypertension (blood pressure: 141/100 mmHg). A mediastinal tumor was discovered to be the cause of the patient's chronic hypokalemia and hypercortisolemia. Cortisol levels increased in the morning, reaching 47.7 ug/dL. The levels of the hormones ACTH, aldosterone, and renin were determined to be 281 pg/mL, 3.0 ng/dL, and 2.1 pg/mL, respectively. The presence of hypertension, hypokalemia, and alkalinity suggested Cushing's syndrome, which was proven to be ACTH-dependent ECS by a dexamethasone suppression test. A chest CT scan revealed inflammation in the posterior basal region of the right lower lobe. The superior anterior mediastinum was characterized by round-shaped isodensity lesions with distinct borders. She underwent thoracoscopic anterior mediastinal tumor excision via the subxiphoid technique (R0 resection); following surgery, her blood pressure returned to normal, and the hypernatremia/hypopotassemia resolved. The tumor was determined to be a thymic carcinoid. Most notably, cortisol levels fell to half of their presurgical levels after one hour of surgery, and other abnormalities corrected substantially postoperatively.

Conclusion: Thoracoscopic excision of thymic tumors by subxiphoid incision may be a useful treatment option for ECS caused by neuroendocrine tumors of the thymus.
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http://dx.doi.org/10.1186/s12893-022-01674-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9188062PMC
June 2022

Two new members in the quaternary Cs-Ag-As-S family with different arrangements of Ag-S and As-S asymmetric building units: syntheses, structures, and theoretical studies.

Dalton Trans 2020 Jul;49(28):9743-9750

Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.

New functional materials of As-based multinary chalcogenidometalates have received special attention due to their different oxidation states and flexible building blocks. In this work, two new quaternary thioarsenates(iii), namely Cs2Ag2As2S5 (I) and Cs3AgAs4S8 (II), have been obtained by a simple surfactant-thermal technique. Their structures were determined on the basis of single-crystal X-ray diffraction; compound I belongs to the triclinic space group P1[combining macron] (no. 2) [a = 7.49(2) Å, b = 9.30(2) Å, c = 9.94(2) Å, α = 63.28(3)°, β = 82.11(3)°, γ = 87.78(3)°, V = 612.4(2) Å3 and Z = 2], whereas compound II crystallizes in the monoclinic space group C2/c (no. 12) [a = 27.76(6) Å, b = 6.98(2) Å, c = 19.68(4) Å, β = 109.85(3)°, V = 3586.7(2) Å3 and Z = 8]. Both structures are shown to feature two-dimensional (2D) layers with different arrangements of Ag-S and As-S asymmetric building units (ABUs). In compound I, the layer is constructed from vertex-sharing dimeric [As2S5] units linked by tetrameric [Ag4S8] moieties. The layered structure in compound II is formed by 21 helical chains based on [As4S9] groups which are further interconnected by tetrahedral [AgS4] chains. The analysis of the quaternary X-Ag-As-S (X = cations) system shows that various combination ways of Ag-S and As-S ABUs in these sulfides can be attributed to the cation-cation repulsion and stereochemically active lone-pair effect. The UV-vis/NIR absorption spectrum indicates that the optical band energy (Eg) of compounds I and II is 2.48 eV and 2.24 eV, respectively. Moreover, theoretical calculations indicate that the As-S and Ag-S bonding states determine the optical properties of the title compounds. This work not only enriches the structural chemistry of thioarsenates, but also opens up a new avenue for exploring novel multinary chalcogenidometalates.
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http://dx.doi.org/10.1039/d0dt01375gDOI Listing
July 2020

One-Dimensional Chains in Pentanary Chalcogenides ABaCuSbS (A = K, Rb, Cs) Displaying a Photocurrent Response.

Inorg Chem 2020 Feb 22;59(3):1577-1581. Epub 2020 Jan 22.

Institute for Composites Science Innovation, School of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China.

The discovery of new inorganic functional chalcogenides is of fundamental importance in structure chemistry and materials science. Herein, a new type of pentanary thioantimonates, ABaCuSbS (A = K, Rb, Cs), has been discovered by a solvothermal method at low temperature. These isostructural compounds belong to the monoclinic space group 2/ (No. 12) and comprise unique one-dimensional (1D) [CuSbS] chains surrounded by discrete A and Ba cations. Such a 1D chain structure is the first case of chalcogenides in the X/Cu/Sb/Q (X = cations; Q = chalcogen) system. The energy gaps range from 1.90 to 1.98 eV for ABaCuSbS (A = K, Rb, Cs) were obtained from the UV-visible reflectance spectroscopy. Moreover, RbBaCuSbS displays an intriguing photocurrent response under simulated solar-light illumination. The theoretical calculations were also carried out to understand the interrelationship of the optical performance and electronic structure.
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http://dx.doi.org/10.1021/acs.inorgchem.9b03148DOI Listing
February 2020

Enhanced Transparency of Rough Surface Sapphire by Surface Vitrifaction Process.

ACS Appl Mater Interfaces 2018 Mar 22;10(9):7693-7696. Epub 2018 Feb 22.

College of Materials Science &Engineering , China Jiliang University , Hangzhou 310018 , China.

A novel, simple, and low-cost in situ surface vitrification method has been effectively developed to enhance the optical transparency of rough surface sapphire at UV-visible-IR regions. This method is to obtain a glass layer on the sapphire surface through vitrifaction process. The thickness, refractive index, components and transition temperature of the glass layer have been investigated and discussed respectively by XRD, DSC, SEM and EDS elemental analysis. The experimental results show that the vitrified sapphire has high transparency even after 1000 °C annealing at UV-visible-IR regions.
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http://dx.doi.org/10.1021/acsami.7b19191DOI Listing
March 2018

Facile Hydrazine-Hydrothermal Syntheses and Characterizations of Two Quaternary Thioarsenates(III): Two-Dimensional SrAg4 As2 S6 ⋅2 H2 O and One-Dimensional BaAgAsS3.

Chem Asian J 2016 Jun 27;11(12):1842-8. Epub 2016 May 27.

State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Two new quaternary thioarsenates(III), SrAg4 As2 S6 ⋅2 H2 O (1) and BaAgAsS3 (2), have been prepared through a hydrazine-hydrothermal method at low temperature. Compound 1 possesses a two-dimensional (2D) layer network, while compound 2 features a one-dimensional (1D) column structure. The detailed structure analysis indicates that Sr(2+) and Ba(2+) cations have different directing effects on the structures of thioarsenates(III). Both experimental and theoretical studies demonstrate that compounds 1 and 2 are narrow-gap semiconductors. Our success in synthesizing these two quaternary thioarsenates(III) proves that the hydrazine-hydrothermal technique is a powerful yet facile synthetic method for exploring new complex chalcogenides with diverse crystal structures and interesting physical properties.
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http://dx.doi.org/10.1002/asia.201600381DOI Listing
June 2016

Preparation of Porous Three-Dimensional Quaternary Thioantimonates(III) ACuSb2 S4 (A = Rb, Cs) through a Surfactant-Thermal Method.

Chem Asian J 2015 Dec 1;10(12):2604-8. Epub 2015 Oct 1.

School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.

Two novel porous three-dimensional (3D) quaternary thioantimonates(III) ACuSb2S4 (A = Rb, Cs) were successfully synthesized by employing the neutral surfactant PEG-400 (PEG = polyethyleneglycol) as reaction media, these are significantly different from the known quaternary A-Cu-Sb-S thioantimonates(III) with two-dimensional (2D) crystal structures. This is the first time that crystalline quaternary chalcogenides have been prepared in surfactant media. Both experimental and theoretical studies confirm they are semiconductors with narrow band gaps. Our results demonstrated that the surfactant-thermal strategy could offer a new opportunity to explore novel chalcogenides with diverse crystal structures and interesting physicochemical properties.
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http://dx.doi.org/10.1002/asia.201500867DOI Listing
December 2015

Hydrazine-hydrothermal synthesis and characterization of the two new quaternary thioantimonates(III) BaAgSbS3 and BaAgSbS3·H2O.

Inorg Chem 2015 Sep 2;54(18):8931-6. Epub 2015 Sep 2.

State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, People's Republic of China.

The two new quaternary thioantimonates(III) BaAgSbS3 (1) and BaAgSbS3·H2O (2) have been synthesized through a hydrazine-hydrothermal method at low temperature. Compound 1 possesses a two-dimensional (2D) layer structure, while compound 2 features a three-dimensional (3D) channel framework. The optical band gaps of 1 and 2 are approximately 2.2 and 2.4 eV, respectively. Our results clearly indicated that the hydrazine-hydrothermal method could offer exciting opportunities for exploring novel multinary chalcogenides with diverse crystal structures and interesting physical properties.
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http://dx.doi.org/10.1021/acs.inorgchem.5b00974DOI Listing
September 2015

Three reversible polymorphic copper(I) complexes triggered by ligand conformation: insights into polymorphic crystal habit and luminescent properties.

Inorg Chem 2015 May 16;54(9):4200-7. Epub 2015 Apr 16.

†College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

Three luminescent polymorphs based on a new copper(I) complex Cu(2-QBO)(PPh3)PF6 (1, PPh3 = triphenylphosphine, 2-QBO = 2-(2'-quinolyl)benzoxazole) have been synthesized and characterized by FT-IR, UV-vis, elemental analyses, and single-crystal X-ray diffraction analyses. Each polymorph can reversibly convert from one to another through appropriate procedures. Interestingly, such interconversion can be distinguished by their intrinsic crystal morphologies and colors (namely α, dark yellow plate, β, orange block, γ, light yellow needle) as well as photoluminescent (PL) properties. X-ray crystal structure analyses of these three polymorphs show three different supramolecular structures from 1D to 3D, which are expected to be responsible for the formation of three different crystal morphologies such as needle, plate, and block. Combination of the experimental data with DFT calculations on these three polymorphs reveals that the polymorphic interconversion is triggered by the conformation isomerization of the 2-QBO ligand and can be successfully controlled by the polarity of the process solvents (affecting the molecular dipole moment) and thermodynamics (affecting the molecular total energy). It is also found that the different crystal colors of polymorphs and their PL properties are derived from different θ values (dihedral angle between benzoxazolyl and quinolyl group of the 2-QBO ligand) and P-Cu-P angles based on TD-DFT calculations. Moreover, an interesting phase interconversion between γ and β has also been found under different temperature, and this result is consistent with the DFT calculations in which the total energy of β is larger than that of γ. This polymorphism provides a good model to study the relationship between the structure and the physical properties in luminescent copper(I) complexes as well as some profound insights into their PL properties.
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http://dx.doi.org/10.1021/ic502709bDOI Listing
May 2015

A new heteroleptic cuprous complex with strong yellow photoluminescence.

Acta Crystallogr C Struct Chem 2014 Sep 9;70(Pt 9):858-61. Epub 2014 Aug 9.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

In the title heteroleptic cuprous complex, (acetonitrile-κN)({2-[2-(diphenylphosphanyl)phenoxy]phenyl}diphenylphosphane-κ(2)P,P')[2-(pyridin-4-yl-κN)-1,3-benzoxazole]copper(I) hexafluoridophosphate, [Cu(C(36)H(28)OP(2))(CH(3)CN)(C(12)H(8)N(2)O)]PF6, conventionally abbreviated [Cu(POP)(CH3CN)(4-PBO)]PF6, where POP is the diphosphane ligand {2-[2-(diphenylphosphanyl)phenoxy]phenyl}diphenylphosphane and 4-PBO is the N-containing ligand 2-(pyridin-4-yl)-1,3-benzoxazole, the asymmetric unit consists of a hexafluoridophosphate anion and a whole mononuclear cation, where the Cu(I) centre is coordinated by two P atoms from the POP ligand, by one N atom from the 4-PBO ligand and by the N atom of the coordinated acetonitrile molecule, giving rise to a CuP2N2 distorted tetrahedral coordination geometry. The electronic absorption, photoluminescence and thermal stability properties of this complex have been studied on as-synthesized samples, which had previously been examined by powder X-ray diffraction. A yellow emission signal is attributed to an excited state arising from metal-to-ligand charge transfer (MLCT).
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http://dx.doi.org/10.1107/S2053229614018014DOI Listing
September 2014

A square-pyramidal copper(II) complex with strong intramolecular hydrogen bonds: diaqua(N,N'-dimethylformamide-κO)bis[2-(diphenylphosphoryl)benzoato-κO]copper(II).

Acta Crystallogr C 2013 May 9;69(Pt 5):463-6. Epub 2013 Apr 9.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

In the title Cu(II) complex, [Cu(C19H14O3P)2(C3H7NO)(H2O)2], the molecule is bisected by a twofold axis relating the two 2-(diphenylphosphoryl)benzoate (ODPPB) ligands. The asymmetric unit consists of a Cu(II) metal centre on the symmetry axis, an ODPPB ligand, one water ligand and one dimethylformamide (DMF) ligand (disordered around the twofold axis). The Cu(II) ion has fivefold coordination provided by two carboxylate O atoms from two ODPPB ligands, two O atoms from two coordinated water molecules and another O atom from a (disordered) DMF molecule, giving a CuO5 square-pyramidal coordination geometry. The ODPPB ligand adopts a terminal monocoordinated mode with two free O atoms forming two strong intramolecular hydrogen bonds with the coordinated water molecules, which may play a key role in the stability of the molecular structure, as shown by the higher release temperature for the coordinated water molecules than for the coordinated DMF molecule. The optical absorption properties of powder samples of the title compound have also been studied.
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http://dx.doi.org/10.1107/S0108270113008317DOI Listing
May 2013

rac-2,2'-Bis(diphenyl-phosphan-yl)-1,1'-binaphth-yl: a racemic diphosphine ligand.

Acta Crystallogr Sect E Struct Rep Online 2012 Jul 13;68(Pt 7):o2033. Epub 2012 Jun 13.

The asymmetric unit of the title compound, C(44)H(32)P(2), conventionally abbreviated BINAP, is one half of the complete chiral BINAP mol-ecule, which adopts a C2 crystallographic point-group symmetry with a twofold axis splitting the mol-ecule in two identical halves; a center of symmetry between mol-ecules further determines the racemic pairs. There are no obvious supra-molecular inter-actions between adjacent BINAP mol-ecules.
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http://dx.doi.org/10.1107/S1600536812025603DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3393302PMC
July 2012

Aqua-[4-(hy-droxy-imino-meth-yl)pyridine-κN](imino-diacetato-κO,N,O')copper(II).

Acta Crystallogr Sect E Struct Rep Online 2011 Sep 27;67(Pt 9):m1291-2. Epub 2011 Aug 27.

In the title complex, [Cu(C(4)H(5)NO(4))(C(6)H(6)N(2)O)(H(2)O)], conventionally abbreviated Cu(IDA)(4-OXPy)(H(2)O), where IDA is imino-diacetate and 4-OXPy is 4-(hy-droxy-imino-meth-yl)pyridine, the Cu(II) atom exhibits a distorted square-pyramidal coordination geometry, which is constructed from two O atoms and one N atom from a IDA ligand, one N atom from 4-OXPy ligand and one O atom from water. This mol-ecule looks like a space shuttle, the IDA ligand is its empennage (tail), and the 4-OXPy ligand is its airframe. The complexes are linked into two-dimensional supra-molecular layers parallel to (100) by three pairs of O-H⋯O hydrogen bonds. Two pairs of N-H⋯O hydrogen bonds further connect these supra-molecular layers, forming a three-dimensional supra-molecular network.
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http://dx.doi.org/10.1107/S1600536811033459DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200882PMC
September 2011

A double salt of iodo-bis-muthate: cis-aqua-iodidobis(1,10-phenanthroline)cobalt(II) tris-(1,10-phenanthroline)cobalt(II) trans-hexa-μ(2)-iodido-hexa-iodidotribismuthate(III).

Acta Crystallogr Sect E Struct Rep Online 2011 Sep 27;67(Pt 9):m1284-5. Epub 2011 Aug 27.

In the title complex, [Co(C(12)H(8)N(2))(3)][CoI(C(12)H(8)N(2))(2)(H(2)O)][Bi(3)I(12)], conventionally abbreviated [Co(phen)(3)][CoI(phen)(2)(H(2)O)][Bi(3)I(12)], where phen is 1,10-phenanthroline, the Co(II) atom in one cation is coordinated by six N atoms from three phen ligands in an octa-hedral coordination while the Co(II) atom in the other cation is coordinated octa-hedrally by four N atoms from two phen ligands, one water O atom and one I atom. In the anion, three Bi(III) ions adopt an octa-hedral coordination constructed by six I(-) ligands. The three BiI(6) octa-hedra are fused together through trans face-sharing.
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http://dx.doi.org/10.1107/S1600536811033460DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200835PMC
September 2011

A photochromic dinuclear compound: aquatetrakis(μ-2,3-diphenylprop-2-enoato)bis(2,3-diphenylprop-2-enoato)ethanolbis(1,10-phenanthroline)dilanthanum(III).

Acta Crystallogr C 2011 Sep 11;67(Pt 9):m293-6. Epub 2011 Aug 11.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

The title dinuclear complex, (aqua-1κO)tetrakis(μ-2,3-diphenylprop-2-enoato-1:2κ(2)O:O')bis(2,3-diphenylprop-2-enoato)-1κO;2κO-(ethanol-2κO)bis(1,10-phenanthroline)-1κ(2)N,N';2κ(2)N,N'-dilanthanum(III), [La(2)(C(15)H(11)O(2))(6)(C(12)H(8)N(2))(2)(C(2)H(5)OH)(H(2)O)], contains two similar La(III) centres with distorted [LaO(6)N(2)] bicapped triganol-prismatic coordination polyhedra formed by six phenylcinnamate (PCA(-) or 2,3-diphenylprop-2-enoate) ligands, two 1,10-phenanthroline (phen) ligands, a coordinating ethanol molecule and a coordinating water molecule. The two metal centres are bridged by four μ-PCA(-) ligands, with the remaining two PCA(-) ligands coordinated in a monodentate fashion. The noncoordinated carboxylate O atoms on the terminal PCA(-) ligands form O-H···O hydrogen bonds with the coordinated solvent molecules. Each La centre is also coordinated by a bidentate phen ligand. The PCA(-) ligands all adopt syn-syn orientations, with the two phenyl rings presenting dihedral angles of about 70°. The compound displays photochromic behaviour both in solution and in the solid state.
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http://dx.doi.org/10.1107/S0108270111030095DOI Listing
September 2011

catena-Poly[[(1,10-phenanthroline-κN,N')copper(I)]-μ(2)-iodido].

Acta Crystallogr Sect E Struct Rep Online 2010 Oct 31;66(Pt 11):m1486. Epub 2010 Oct 31.

The solvothermal reaction of copper(I) iodide and 1,10-phenanthroline (phen) in ethanol yielded the title polymeric compound, [CuI(C(12)H(8)N(2))](n). The asymmmetric unit comprises one Cu(+) cation, one I(-) anion and one phen ligand. Each Cu(+) cation is in a distorted tetrahedral coordination by two iodide anions and two N atoms from a bidentate chelating phen ligand. The Cu(+) cations are bridged through the iodide anions, leading to a zigzag chain structure extending parallel to [100]. There are π-π inter-actions among adjacent phen ligands of one chain [centroid-centroid distance = 3.693 (3) Å].
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http://dx.doi.org/10.1107/S1600536810043205DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3009332PMC
October 2010

2'-Eth-oxy-1,3,3-trimethyl-spiro-[indoline-2,3'-3H-naphtho-[2,1-b][1,4]oxazine].

Acta Crystallogr Sect E Struct Rep Online 2010 Jun 18;66(Pt 7):o1695. Epub 2010 Jun 18.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

In the title compound, C(24)H(24)N(2)O(2), the five-membered ring of the indoline ring system adopts an envelope conformation with the spiro C atom at the flap. The dihedral angle between the benzene ring of the indoline ring system and the naphthalene ring system is 71.70 (7)°. In the crystal structure, pair of weak C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.
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http://dx.doi.org/10.1107/S1600536810022890DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3006916PMC
June 2010

Chloridobis(1,10-phenanthroline)zinc(II) tetra-chlorido(1,10-phenan-throline)bis-muthate(III) monohydrate.

Acta Crystallogr Sect E Struct Rep Online 2010 Dec 24;67(Pt 1):m109-10. Epub 2010 Dec 24.

In the crystal structure of the title monohydrate salt, [ZnCl(C(12)H(8)N(2))(2)][BiCl(4)(C(12)H(8)N(2))]·H(2)O, the ionic components are linked into three-dimensional supra-molecular channels by five pairs of C-H⋯Cl hydrogen bonds and π-π stacking inter-actions with an inter-planar distance of 3.643 (2) Å. The solvent water mol-ecules are lodged in the channels.
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http://dx.doi.org/10.1107/S1600536810052682DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3050139PMC
December 2010

An organic photochromic compound: (2S)-2'-ethoxy-1,3,3-trimethyl-6'-(piperidin-1-yl)spiro[indoline-2,3'-3'H-naphtho[2,1-b][1,4]oxazine].

Acta Crystallogr C 2009 Dec 11;65(Pt 12):o621-3. Epub 2009 Nov 11.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

In the course of our synthesis of hybrid photochromic compounds, the unexpected new organic photochromic title compound, C(29)H(33)N(3)O(2), (I), was obtained. It is a derivative of the parent spirooxazine 1,3,3-trimethyl-6'-(piperidin-1-yl)spiro[indoline-2,3'-3'H-naphtho[2,1-b][1,4]oxazine], (II). The 2'-ethoxy group gives (I) different photochromic properties from its parent spirooxazine (II).
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http://dx.doi.org/10.1107/S0108270109043339DOI Listing
December 2009

N,N'-p-Phenyl-enediisonicotinamide monohydrate.

Acta Crystallogr Sect E Struct Rep Online 2009 Jul 4;65(Pt 8):o1749. Epub 2009 Jul 4.

The organic mol-ecule of the title compound, C(18)H(14)N(4)O(2)·H(2)O, lies on a center of inversion located at the centre of the central phenyl-ene ring. There are two half-molecules in the asymmetric unit. In the crystal, the mol-ecules are linked through by N-H⋯O and O-H⋯N hydrogen bonds involving the water mol-ecule, forming a layer structure. The layers inter-act by π-π inter-actions between the aromatic rings.
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http://dx.doi.org/10.1107/S1600536809024684DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977464PMC
July 2009

Two-dimensional dysprosium(III) triiodate(V) dihydrate, Dy(IO(3))(3)(H(2)O)·H(2)O.

Acta Crystallogr Sect E Struct Rep Online 2009 Jul 15;65(Pt 8):i61-i62. Epub 2009 Jul 15.

During our research into novel nonlinear optical materials using 1,10-phenanthroline as an appending ligand on lanthanide iodates, crystals of an infinite layered Dy(III) iodate compound, Dy(IO(3))(3)(H(2)O)·H(2)O, were obtained under hydro-thermal conditions. The Dy(III) cation has a dicapped trigonal prismatic coordination environment consisting of one water O atom and seven other O atoms from seven iodate anions. These iodate anions bridge the Dy(III) cations into a two-dimensional structure. Through O-H⋯O hydrogen bonds, all of these layers stack along [111], giving a supra-molecular channel, with the solvent water mol-ecules filling the voids.
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http://dx.doi.org/10.1107/S1600536809027068DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977138PMC
July 2009

Poly[(μ(5)-5-carboxylatotetrahydrofuran-2,3,4-tricarboxylic acid)sodium].

Acta Crystallogr Sect E Struct Rep Online 2009 Oct 23;65(Pt 11):m1419-20. Epub 2009 Oct 23.

College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.

The search for the novel metal-organic frameworks (MOFs) materials using tetra-hydro-furan-2,3,4,5-tetra-carboxylic acid (THFTCA) as a versatile multi-carboxyl ligand, lead to the synthesis and the structure determination of the title compound, [Na(H(3)THFTCA)] or [Na(C(8)H(7)O(9))](n), which was obtained by a solution reaction at room temperature. The ligand is mono-deprotonated, coordinating five sodium ions through one furan oxygen atom and six carboxyl oxygen atoms. The sodium ion exhibits a distorted penta-gonal-bipyramidal NaO(7) geometry consisting of seven O atoms derived from five surrounding ligands. Two adjacent pentagonal bipyramids share an O-O edge, forming a dinuclear sodium cluster. Finally, these clusters are effectively linked by the carboxyl groups of THFTCA ligands, forming a firm metal organic framework and O-H⋯O hydrogen bonds contribute to the crystal packing.
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http://dx.doi.org/10.1107/S160053680904269XDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2971171PMC
October 2009
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