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Photochromism of a Methyl Viologen Bismuth(III) Chloride: Structural Variation Before and After UV Irradiation
Author(s) -
Xu Gang,
Guo GuoCong,
Wang MingSheng,
Zhang ZhangJing,
Chen WenTong,
Huang JinShun
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200700122
Subject(s) - photochromism , viologen , photochemistry , irradiation , bismuth , chemistry , octahedron , chloride , crystallography , crystal structure , organic chemistry , physics , nuclear physics
Color scheme : Reversibly photochromic crystals of (MV)Bi 2 Cl 8 (methyl viologen, MV 2+ : N , N ′‐dimethyl‐4,4′‐bipyridinium) show structural variations before and after UV irradiation. Color reversion is accomplished by heating in air (see picture). ([Bi 2 Cl 8 ] 2− ) ∞ double‐octahedral chains serve as electron donors to in situ generated MV 2+ dications.