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Mini‐Violerythrins: Why can C 38 ‐Carotinoids be Blue?
Author(s) -
Kummer Matthias,
Martin Georg,
Martin HansDieter
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198610181
Subject(s) - polyene , homo/lumo , chemistry , blue light , photochemistry , stereochemistry , materials science , organic chemistry , optoelectronics , molecule
The red dinorcanthaxanthin 1 becomes blue upon oxidation to violerythrin 2 . That this slight modification of a carotinoid effects a shift in λ max of about 100 nm remained for a long time unexplained. Studies on miniviolerythrins–model compounds with shortened polyene chains–showed that the effect is mainly due to lowering of the π * ‐LUMO level.
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