Medium controlled photochemistry of Provitamin D: From solutions to liquid crystals
作者： Olga Dmitrenko , Tetiana Orlova , Irina Terenetskaya
DOI: 10.1016/J.MOLLIQ.2018.01.049
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摘要: Abstract The article summarizes the results of our research on branched network Provitamin D photo-isomerization in various media using UV absorption spectroscopy. focus is microenvironment effect efficiency Previtamin cis-trans photoisomerization. Solvent polarity has a negligible homogeneous solutions. In some inhomogeneous significant suppression this undesirable side photoreaction was detected. result discussed accordance with well known concept ground state conformation control trienes photochemistry. Unexpected increase trans-isomer formation under irradiation observed liquid crystalline matrices as compared to solvents. It indicates change pathway or mechanism isomerization. further detailed temperature and concentration studies suggest that ordering liquid-crystalline medium contributes increased isomerization due collective nature process.
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