Modulating the Photoluminescence of Bridged Silsesquioxanes Incorporating Eu<sup>3+</sup>-Complexed <i>n</i>,<i>n</i>′-Diureido-2,2′-bipyridine Isomers: Application for Luminescent Solar Concentrators
作者:Julien Graffion、Xavier Cattoën、Michel Wong Chi Man、Vasco R. Fernandes、Paulo S. André、Rute A. S. Ferreira、Luís D. Carlos
DOI:10.1021/cm2019026
日期:2011.11.8
Two new urea-bipyridine derived bridged organosilanes (P5 and P6) have been synthesized and their hydrolysis–condensation under nucleophilic catalysis in the presence of Eu3+ salts led to luminescent bridged silsesquioxanes (M5-Eu and M6-Eu). An important loading of Eu3+ (up to 11%w) can be obtained for the material based on the 6,6′-isomer. Indeed the photoluminescence properties of these materials