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On the experimental evidence for a departure from first‐order photochemical kinetics in bistable photochromic materials
Author(s) -
Perciante César D.,
Ferrari José A.
Publication year - 2009
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.200945077
Subject(s) - photochromism , kinetics , bistability , exponential function , order (exchange) , exponential decay , first order , thermodynamics , photochemistry , chemistry , materials science , statistical physics , physics , mathematics , mathematical analysis , quantum mechanics , optoelectronics , economics , finance
We discuss the apparent discrepancy between experimental results and the mono‐exponential decay law (which is characteristic of first‐order kinetics) for two‐state photochromic materials during activation and bleaching. Although deviations from first‐order kinetics could be expected for realistic samples, we show that the experimental data presented are actually compatible with a mono‐exponential decay law, and that the apparent discrepancy is attributable to an inappropriate description of the photo‐stationary state. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)