Thermochromic effects in a Jahn-Teller active CuCl(4-)6 layered hybrid system.

Caretta, A; Miranti, R; Arkenbout, A H; Polyakov, A O; Meetsma, A; Hidayat, R; Tjia, M O; Palstra, T T M; van Loosdrecht, P H M

Caretta, A; Miranti, R; Arkenbout, A H; Polyakov, A O; Meetsma, A; Hidayat, R; Tjia, M O; Palstra, T T M; van Loosdrecht, P H M.

Afiliación

Caretta A; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

J Phys Condens Matter ; 25(50): 505901, 2013 Dec 18.

Article en En | MEDLINE | ID: mdl-24220020

RESUMEN

The hybrid material copper (II) tetrachloro-bis(phenyl ethyl ammonium) (C6H5CH2CH2NH3)2CuCl4, or PEACuCl, has been investigated by temperature-dependent spectroscopic absorption experiments. The absorption bands observed in the near-infrared region (1.3-1.9 eV) generally exhibit redshifts with increasing temperature. The temperature-induced energy shifts of the spectral components are shown to be consistently related to temperature-induced Cu-Cl bond length changes. Additionally, the thermochromic color change is caused by a charge transfer band edge redshifting (in the visible region 2.0-2.8 eV) with increasing temperature. By comparison with similar Cu-based systems, it is suggested that this shift is caused by broadening and strengthening of the band.

Asunto(s)

Cloruros/química; Complejos de Coordinación/química; Cobre/química; Electrones; Transición de Fase; Espectroscopía Infrarroja Corta; Temperatura; Termogravimetría; Difracción de Rayos X

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cloruros / Cobre / Complejos de Coordinación Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2013 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Reino Unido

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