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Issue 3, 1994
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Optical investigation of the intervalence charge-transfer interactions in the three-dimensional gold mixed-valence compounds Cs2Au2X6(X = Cl, Br or I)

Abstract

The intervalence charge-transfer (i.v.c.t.) transitions between the gold-(I) and -(III) ions in Cs2Au2X6(X = Cl, Br or I) have been investigated. From the polarized reflectance spectra of a single crystal of Cs2Au2I6 and group-theory analysis, the i.v.c.t. bands have been assigned. The strongest reflectance peak was that of lowest energy, which was observed with the electric vector perpendicular to the c axis, and was assigned to the AuI(5dx2y2)→ AuIII(5dx2y2) transition in the ab plane. This indicates that a two-dimensional correlation between the gold ions is present in the charge-transfer interaction despite the three-dimensional perovskite structure of the compounds.

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Article type: Paper
DOI: 10.1039/DT9940000327
Citation: J. Chem. Soc., Dalton Trans., 1994,0, 327-331
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    Optical investigation of the intervalence charge-transfer interactions in the three-dimensional gold mixed-valence compounds Cs2Au2X6(X = Cl, Br or I)

    N. Kojima and H. Kitagawa, J. Chem. Soc., Dalton Trans., 1994, 0, 327
    DOI: 10.1039/DT9940000327

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