In the search for appropriate host matrices for highly luminescent molecular guest species, an organo-silica monolithic xerogel prepared by the hydrolysis and co-condensation reactions of 3-glycidoxypropyltrimethoxysilane (GPTS) and tetraethylorthosilicate (TEOS) is proposed. Such alkoxides allowed the development of hybrid silica monoliths with a cross-linked three-dimensional structure, in which the silica domains are strictly interconnected with the polymeric network. Highly luminescent monoliths were prepared from the immobilization of a blue-green emissive Ir(III) phosphor in the host matrix, with improved luminescent properties attributed to the greater rigidity of the medium and less diffusion of oxygen within the matrix. The structure of the hybrid material was elucidated by high-resolution solid-state NMR, confirming that the final structure of the developed silica matrix is very similar for both Ir(III)-doped and undoped xerogels. Altogether, the experimental strategy used in this work stands as an advance in the design of photo-functional materials with substantial potential for optical and photonic applications.

在为高发光分子客体寻找合适的主体基质中，提出了通过 3-环氧丙氧基丙基三甲氧基硅烷 (GPTS) 和原硅酸四乙酯 (TEOS) 的水解和共缩合反应制备的有机二氧化硅整体干凝胶。这种醇盐允许开发具有交联三维结构的混合二氧化硅整料，其中二氧化硅域与聚合物网络严格互连。通过将蓝绿色发光 Ir(III) 磷光体固定在主体基质中制备了高发光整料，其改进的发光性能归因于介质的更大刚度和基质内氧的更少扩散。通过高分辨率固态核磁共振阐明了杂化材料的结构，证实所开发的二氧化硅基质的最终结构对于 Ir(III) 掺杂和未掺杂的干凝胶非常相似。总而言之，这项工作中使用的实验策略代表了光功能材料设计的进步，具有巨大的光学和光子应用潜力。