TARD, Cédric; PERRUCHAS, Sandrine; MARON, Sébastien; LE GOFF, X.; GUILLEN, François; GARCIA, Alain; VIGNERON, Jacky; ETCHEBERRY, Arnaud; GACOIN, Thierry; BOILOT, Jean-Pierre

doi:10.1021/cm801780g

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

TARD, Cédric
Laboratoire de physique de la matière condensée [LPMC]

PERRUCHAS, Sandrine
Laboratoire de physique de la matière condensée [LPMC]

MARON, Sébastien
Laboratoire Hétéroéléments et Coordination [DCPH]

Idioma

Article de revue

Este ítem está publicado en

Chemistry of Materials. 2008, vol. 20, n° 22, p. 7010-7016

American Chemical Society

Resumen en inglés

The incorporation of copper iodide clusters in sol−gel silica has been investigated to prepare materials with original luminescent properties. The synthesis, structural characterizations, and optical properties of sol−gel films containing [Cu4I4L4] clusters, L = phosphine-based ligands, are reported. Clusters studied are [Cu4I4(PPh2(CH2)2Si(OCH2CH3)3)4] (C1), able to copolymerize with the silica matrix, and [Cu4I4(PPh2(CH2)2CH3)4] (C2) used as a reference for the characterizations. The luminescent films exhibit the optical properties of these clusters in accordance with XPS and NMR studies demonstrating their integrity in the gel matrix. The temperature dependence of light emission properties of clusters and films shows, for the first time for phosphine-based [Cu4X4L4] clusters, thermochromic luminescence with bright yellow luminescence at room temperature and purple emission at 77 K. As a result of weak Cu−Cu interactions, the two emissive states appear as highly coupled with a low energy barrier (2 kJ·mol−1), leading to a controlled thermochromism in a large temperature range.< Leer menos

Palabras clave en inglés

Thermochromism

Luminescence

Films

Sol-gel process

Inorganic compounds

Metadatos

Licencia de uso del documento

Thermochromic luminescence of sol−fel films based on copper Iodide clusters

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en inglés

DOI

Orígen

Centros de investigación