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Bleaching kinetics of indoly‐benzylfulgimide in PMMA
Author(s) -
Rupp Romano A.,
Zheng Yuan,
Wang Yingli,
Dong Weibin,
Menke Neimule,
Yao Baoli,
Zhao Wei,
Chen Yi,
Fan Meigong,
Xu Jinjun,
Fally Martin
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200642373
Subject(s) - kinetics , photochromism , diffraction , diffraction efficiency , absorbance , exponential decay , chemistry , reaction rate constant , homogeneous , spectroscopy , beam (structure) , materials science , diffraction grating , optics , photochemistry , analytical chemistry (journal) , physics , thermodynamics , organic chemistry , quantum mechanics , nuclear physics
Indoly‐benzylfulgimide belongs to the photochromic fulgide family and follows photochemical first order kinetics. Its bleaching kinetics is investigated at 633 nm and 640 nm by spectroscopy, by the time dependence of transmission and of diffraction from holographically induced gratings. The non‐exponential decay law resulting for diffraction experiments with a Gaussian beam profile is calculated and verified experimentally. For a quasi‐homogeneous beam profile the time constant determined from diffraction decay is half the one for absorbance decay. The photochemical reaction rate of indoly‐benzylfulgimide in PMMA is (3.9 ± 0.3) cm 2 /J at 650 nm. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)