6 July 1998 Molecular design of hybrid organic-inorganic nanocomposites with emission and photochromic properties
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Abstract
Hybrids organic-inorganic nanocomposites are obtained though the hydrolysis and condensation of diethoxymethylsilane and methyltriethoxysilane alkoxides with or without the use of Lewis acids such as Zr(OPrn)4 or Al(etac)(OBus)2 precursors. These materials which present both reductive and hydrophobic behavior are performant host matrices for rare-earth cations and for photochromic dyes such as from spirooxazines (SO), diarylethene derivatives (DE) and furylfulgides (FF). We report the room temperature synthesis of new Eu2+ doped hybrid materials together with their absorption and emission properties. The photochromic properties of the different dyes (SO, DE, FF) in these hybrid solid matrices are also described. Very fast kinetics of coloration and thermal fading (0.2 s-1) are reproducibly evaluated for spiroxazines, while for the first time, quantum yields of the coloration process of diarylethene derivatives and furylfulfydes embedded in solid sol-gel derived matrices are measured.
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Clement Sanchez, Clement Sanchez, A. Lafuma, A. Lafuma, L. Rozes, L. Rozes, Keitaro Nakatani, Keitaro Nakatani, Jacques A. Delaire, Jacques A. Delaire, Eloisa Cordoncillo, Eloisa Cordoncillo, Bruno Viana, Bruno Viana, Purificiation Escribano, Purificiation Escribano, "Molecular design of hybrid organic-inorganic nanocomposites with emission and photochromic properties", Proc. SPIE 3469, Organic-Inorganic Hybrid Materials for Photonics, (6 July 1998); doi: 10.1117/12.312905; https://doi.org/10.1117/12.312905
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