Smolka, Tanja; Sustmann, Reiner; Boese, Roland:
Phenazine and meso-1,2-diphenyl-1,2-ethanediol. Partners in photochromic cocrystals.
1999
In: Journal fuer Praktische Chemie (Weinheim, Germany), Jg. 341 (1999), Heft 4, S. 378 - 383
Artikel/Aufsatz in Zeitschrift1999Chemie
Titel:
Phenazine and meso-1,2-diphenyl-1,2-ethanediol. Partners in photochromic cocrystals.
Autor(in):
Smolka, Tanja; Sustmann, Reiner; Boese, RolandLSF
Erscheinungsjahr
1999

Abstract:

A H-bonded network in a 1:1 cocrystal of phenazine and meso-1,2-diphenyl-1,2-ethanediol places phenazine and diol in such a way that a thermally reversible photochromism is produced. The structure of the cocrystal is detd. by x-ray crystallog. Thermally reversible changes in the UV/Vis and IR spectrum on irradn., in combination with the generation of paramagnetism (ESR) lead to the interpretation that a light-induced electron transfer between 2 phenazine mols. is followed by a double proton transfer to the N atoms of the radical anion of phenazine.