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Tailor‐Made Photochromic Systems: First Bichromophoric Spiro‐1,8a‐dihydroindolizines
Author(s) -
Spang Peter,
Dürr Heinz
Publication year - 1984
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.198402411
Subject(s) - photochromism , excited state , ring (chemistry) , photochemistry , wavelength , irradiation , chemistry , materials science , optoelectronics , physics , organic chemistry , atomic physics , nuclear physics
Two different chromophoric molecular units are contained in the novel compounds 1 . Each of the two molecular units can be selectively excited (in each case leading to opening of a five‐membered ring) by irradiation using light of different wavelengths. For example: 1 . R 1 = CH 3 CO, R 1′ = CO 2 CH 3 , R 2 = R 3 = H, X = zero.