Azusa Kikuchi, Yuki Hata, Ryo Kumasaka, Yuichi Nanbu and Mikio Yagi Photoexcited Singlet and Triplet States of a UV Absorber Ethylhexyl Methoxycrylene Photochemistry and Photobiology 89
The excited states of UV absorber, ethylhexyl methoxycrylene (EHMCR) have been studied through measurements of UV absorption, fluorescence, phosphorescence and electron paramagnetic resonance spectra in ethanol. The energy levels of the lowest excited singlet (S1) and triplet (T1) states of EHMCR were determined. The energy levels of the S1 and T1 states of EHMCR are much lower than those of photolabile 4-tert-butyl-4′-methoxydibenzoylmethane. The energy levels of the S1 and T1 states of EHMCR are lower than those of octyl methoxycinnamate.
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