New Representatives of Promising Thermochromic Materials
OL'GA G. SHAKIROVA, LYUDMILA G. LAVRENOVA, VLADIMIR N. IKORSKIY, YURI G. SHVEDENKOV, LILIA A. SHELUDYAKOVA, VLADIMIR V. VOLKOV and STANISLAV V. LARIONOV
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences,
Pr. Lavrentyeva 3, Novosibirsk 630090 (Russia), E-mail: ludm@che.nsk.su
Pages: 757-762
Abstract
Iron (II) complexes with 1,2,4-triazoles are promising thermochromic materials. New complexes of iron (II) perrhenate and dodecahydro-closo-dodecaborate with 1,2,4-triazole (Htrz) and 4-amino-1,2,4-triazole (NH2trz) of the composition FeL3An × mH2O (n = 1, 2; m = 4, 5) are synthesized and investigated. The compounds are studied by means of magneto-chemistry, XPA, electron and IR spectroscopy. Magnetochemical data show that the complexes possess 1A1 <=> 5T2 spin transition. The spin transition is accompanied by thermo-chromism (change of colour from pink to white).
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