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The combination of X-ray diffraction experiments with optical methods such as Raman, UV/Vis absorption and fluorescence spectroscopy greatly enhances and complements the specificity of the obtained information. The upgraded version of the in situ on-axis micro-spectrophotometer, MS2, at the macromolecular crystallography beamline X10SA of the Swiss Light Source is presented. The instrument newly supports Raman and resonance Raman spectroscopy, in addition to the previously available UV/Vis absorption and fluorescence modes. With the recent upgrades of the spectral bandwidth, instrument stability, detection efficiency and control software, the application range of the instrument and its ease of operation were greatly improved. Its on-axis geometry with collinear X-ray and optical axes to ensure optimal control of the overlap of sample volumes probed by each technique is still unique amongst comparable facilities worldwide and the instrument has now been in general user operation for over two years.
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http://dx.doi.org/10.1107/S0909049513016063 | DOI Listing |
Phys Chem Chem Phys
September 2025
Shock Wave Research Laboratory, Department of Physics, Abdul Kalam Research Center, Sacred Heart College (Autonomous), affiliated to Thiruvalluvar University, Tirupattur, Tamil Nadu, 635 601, India.
Bismuth ferrite (BiFeO) is a semiconductor with multiferroic properties, synthesized by the sol-gel method. While static high-pressure studies have advanced our understanding of the phase behavior of BiFeO, the effects of dynamic pressure acoustic shock waves remain unexplored. In this study, BiFeO was subjected to 100 shock pulses with 0.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2025
Department of Chemistry - BMC, Biochemistry, Uppsala University, 75123 Uppsala, Sweden.
Phytochromes are photosensor proteins found in plants, fungi, and bacteria. They photoswitch between red light absorbing (Pr) and far-red light absorbing (Pfr) states. Thermal reversion in the dark, however, is an equally important factor in controlling their signaling levels.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
September 2025
College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, PR China.
The interactions of three berberine mid-chain fatty acid salts ([BBR][C], n = 6, 7, 8) with lysozyme (Lyz) are investigated in detail using multi-spectroscopic and molecular docking techniques. Steady-state fluorescence and UV-visible absorption experiments suggest that the binding mechanism of [BBR][C] on Lyz is a static quenching with a binding ratio of 1:1. The compound [BBR][C] exhibits a moderate binding affinity toward Lyz.
View Article and Find Full Text PDFMicrosc Res Tech
September 2025
Department of Physics, West Tehran Branch, Islamic Azad University, Tehran, Iran.
Titanium dioxide (TiO) thin films were deposited on glass substrates under HV conditions at room temperature by the physical vapor deposition method. Produced titanium thin films were post-annealed at 573 K at different oxygen flows (0, 9 and 23 cm/s). The influence of different oxygen flows on nano-structure, crystallography, and optical parameters of TiO films was investigated by XRD, AFM, and spectrophotometer in the UV-VIS wavelength range.
View Article and Find Full Text PDFJ Phys Chem B
September 2025
Department of Chemistry and Chemical Engineering, Florida Institute of Technology, Melbourne, Florida 32901, United States.
Merocyanine photoacids (MCHs) have found applications in chemical, material, energy, and biomedical areas, and are currently being investigated for industrial applications. Hydrolysis, relatively high dark acidity, and moderate solubility in water are the major concerns for their practical applications. Inspired by the structure of the cell membrane, we incorporated the most commonly used MCH into sodium dodecyl sulfate (SDS) micelles.
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