MCM-41介孔分子筛负载咔唑类荧光分子杂化材料的合成及发光性质

Synthesis and Luminescent Properties of Carbazole-based Fluorescent Molecules Incorporated in Mesoporous Molecular Sieve MCM-41

摘要:

通过浸渍法将5种咔唑类荧光分子负载于介孔材料MCM-41上，制备有机-无机杂化复合荧光材料，并对咔唑荧光分子和杂化复合材料的表面结构、紫外-可见吸收、荧光发射等性质进行了对比。结果表明，负载后的咔唑类荧光分子分散于MCM-41孔道上，材料热稳定性提高，在100 ~ 350 oC内没有明显失重，其紫外吸收和荧光发射也发生明显蓝移（λabsmax = 331 ~ 368 nm，λemmax = 401 ~ 435 nm）。制备的杂化复合材料可用作蓝色荧光材料 (λemmax = 401 ~ 435 nm)。

Abstract:

Five carbazole-based fluorescent molecules were incorporated into mesoporous molecular sieve MCM-41 by impregnation method. Their photophysical properties were investigated systematically via XRD, UV-vis absorption and emission spectra in both solution and solid states. The absorption and emission properties of these fluorescent materials could be effectively changed by loading with MCM-41. These carbazole-based fluorescent molecules dispersed in the MCM-41 mesoporous channels and no obvious mass losses at the range of 100 ~ 350 oC, which indicate that the thermal stabilities of these materials are improved. Meanwhile, these hybrid materials show significant blue-shifts in their UV-vis absorption and fluorescent spectra compared to the fluorescent molecules in solid state. These hybrid materials can be utilized as efficient blue fluorescent materials (λemmax = 401 ~ 435 nm).