Raflectance Spectra and Band Structures of Quasi-One-Dimensional [Pt(en)2][Pt(en)2X2](ClO4)4 (X=I and Cl, en=ethylenediamine) Crystals

Masatoshi Tanaka; Susumu Kurita; Masami Fujisawa; Setsuko Matsumoto

doi:10.1143/JPSJ.54.3632

Abstract

Reflectance spectra of single crystals of [Pt(en)₂][Pt(en)₂I₂](ClO₄)₄ and [Pt(en)₂][Pt(en)₂Cl₂](ClO₄)₄ have been measured in the vacuum ultraviolet region up to 25 eV, with synchrotron radiation. Halogen ion-dependent structures observed below 10 eV are ascribed to the transitions related to the valence bands originating from p orbitals of halogens. The one-dimensional band structures for the two compounds are determined from these spectral structures and their polarization-dependences, with the aid of the tight-binding approximation.

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