Electronic spectra and nature of transitions in [NH2(C2H5)2]2CuxZn1?xCl4 (x = 0.5, 1) crystals |
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Authors: | V. B. Kapustyanyk A. Ya. Batyuk Yu. M. Korchak |
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Affiliation: | (1) Ivan Franko Lvov National University, 107 Tarnavskii Str., UA-79017 Lvov, Ukraine |
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Abstract: | The absorption spectra of the [NH2(C2H5)2]2CuCl4 crystals grown from a solution in ethyl alcohol and also of solid solutions of [NH2(C2H5)2]2Zn0.5Cu0.5Cl4 in the visible spectral region have been investigated in the vicinity of thermochromic phase transitions. It is shown that the phenomenon of thermochromism in these crystalline compounds is primarily related to the replacement of the square-planar geometry of the coordination surrounding of the Cu2+ ion by a tetrahedral one.Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 71, No. 6, pp. 798–802, November–December, 2004.This revised version was published online in April 2005 with a corrected cover date. |
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Keywords: | absorption spectrum diethylaminetetrachlorocuprate thermochromism phase transition |
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