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The Templating Effect and Photochemistry of Viologens in Halometalate Hybrid Crystals (Eur. J. Inorg. Chem. 1/2013)
Author(s) -
Mercier Nicolas
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201390000
Subject(s) - viologen , chemistry , octahedron , photochemistry , polar , electron transfer , radical , crystallography , shadow (psychology) , crystal structure , organic chemistry , physics , psychology , astronomy , psychotherapist
As the walls of the Angers' castle (France) connect the towers, the methylviologen dications stabilise the rare halobismuthate or haloantimonate anionic chains of trans ‐connected octahedra. The chains are polar as highlighted by the flags at the top of the towers, which leads to a new fascinating family of ferroelectrics. In the moats, in the shadow of the castle, the clumps of crystals of halometalate viologen salts are yellow, but become black as soon as the sun appears, as a consequence of a photoinduced electron‐transfer process that occurs in the presence of viologen radicals. Details are discussed in the Microreview by N. Mercier on p. 19 ff.