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J Chem Phys 2022 Aug;157(5):054505

Graduate School of Arts and Sciences, Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 113-8902, Japan.

Hyper-Raman (HR) spectra of benzene-h, benzene-d, and pyridine in the liquid phase excited at 1064 nm were measured by a picosecond laser with a high repetition rate. Although benzene and pyridine are important aromatic molecules, the qualities of the HR spectra previously reported were not high enough to be compared with those of IR and Raman spectroscopy. Our HR spectroscopic system significantly improves sensitivity that enables the detection of HR bands of benzene and pyridine not observed before. Read More

J Chem Phys 2022 Aug;157(5):054103

School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, USA.

Spectral line shapes provide a window into the local environment coupled to a quantum transition in the condensed phase. In this paper, we build upon a stochastic model to account for non-stationary background processes produced by broad-band pulsed laser stimulation, as distinguished from those for stationary phonon bath. In particular, we consider the contribution of pair-fluctuations arising from the full bosonic many-body Hamiltonian within a mean-field approximation, treating the coupling to the system as a stochastic noise term. Read More

J Colloid Interface Sci 2022 Jul 20;628(Pt A):378-388. Epub 2022 Jul 20.

College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, PR China. Electronic address:

Solar-driven transfer of nitrogen into ammonia is still challenging as a result of the strong dipole moment of the NN triple bond. Molecular nitrogen activation to construct the reactive active nitrogen species (RNS) is the key aspect for the highly efficient solar N conversion. Herein, we selected black phosphorus-BiVO (BP-BiVO) as a model system to clarify the significance of the inherent defective state to the molecular nitrogen activation over the formed heterojunctions. Read More

Microvasc Res 2022 Aug 2:104418. Epub 2022 Aug 2.

Vascular Physiology Laboratory, Department of Basic Sciences, Universidad del Bío-Bío, Campus Fernando May, Av. Andrés Bello 720, Casilla 447, Chillán, Chile; Group of Research and Innovation in Vascular Health (GRIVAS Health), Chillán, Chile. Electronic address:

Microcirculation analysis of the brain cortex is challenging because surface perfusion varies rapidly in small space-time regions and is bone protected. The laser speckle contrast imaging (LSCI) technique allows analyzing in vivo brain vascular perfusion generating a large amount of data that requires sophisticated data analytics, making researchers invest much effort in processing. Our research question was whether the reduced placental perfusion model (RUPP) of preeclampsia (PE) was associated with impaired blood perfusion in the offspring's brains. Read More

Anal Chem 2022 Aug 5. Epub 2022 Aug 5.

Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, China.

A balanced detection of both adsorbates and dissolved species is very important for the clarification of the electrochemical reaction mechanism yet remains a major challenge for different modes of electrochemical infrared (IR) spectroscopy. Among others, conventional attenuated total reflection-surface-enhanced IR absorption spectroscopy (ATR-SEIRAS) is far less sensitive to low-concentration solution species than to surface species. We report herein an electrochemical wide-frequency ATR-SEIRAS with a novel thin-layer flow cell design, fulfilling the simultaneous detection of the variations of surface and solution species. Read More