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PHOTO‐DIMERIZATION AND PHTO‐REDUCTION OF ALPHA‐NAPTHOQUINONE IN DIFFERENT SOVENT MEDIA
Author(s) -
Rennnert J.,
Japar S.,
Guttman M.
Publication year - 1967
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1967.tb08747.x
Subject(s) - excited state , excitation , benzene , photochemistry , chemistry , reduction (mathematics) , ground state , molecule , absorption (acoustics) , product (mathematics) , atomic physics , optics , physics , organic chemistry , quantum mechanics , geometry , mathematics
‐Violet and ultravioet radiation are equally efficient in phot‐dimerizing aplhanathoquinone in benzene. The reactants yielding the dimeric photo‐product are moelcules in the ground state and excited ones. The photo‐reduction in 2‐propanol occurs with the same effciency for excitation in the n→* and →π* absorption bands. It is concluded that either reaction occurs via an n,π* excited state molecule, by direct excitation or after 100 per cent effucient internal conversion from the π,π* to the n,π* state.