激光染料掺杂介孔SiO_2微球的光学特性研究

Study on luminescence properties of mesoporous silica spheres doped with laser dye

利用自组装法将激光染料分子(4-dicyanomethylene-2-methyl-6-p-dimethyl-aminostyryl-4H-pyran,DCM)组装到介孔二氧化硅微球(mesoporous silica spheres,MSS)孔道中,制备出光学活性较好的复合材料DCM-MSS。样品DCM-MSS通过光学显微镜、XRD、FTIR、N_2吸附/脱附、紫外可见吸收光谱和荧光光谱进行表征。结果表明:DCM-MSS具有相对透明、均一的球状形貌,粒径约为800μm;复合材料DCM-MSS与固体激光染料分子DCM相比,最大吸收峰发生了123nm的蓝移,说明染料分子在复合材料DCM-MSS中呈单分散状态;复合材料DCM-MSS的发射峰位相对于染料分子DCM发生了100nm的红移,说明复合材料DCM-MSS具有很好的光致发光性质。

The composite material of DCM-MSS with optical property has been successfully prepared by doping mesoporous silica spheres（MSS）with laser dye 4-dicyanomethylene-2-methyl-6-p-dimethyl-aminostyryl-4H-pyran（DCM）a self-assembly method.The investigations of optical microscope,XRD,FTIR,N_2 adsorption-desorption,UV-Vis and PL characterization confirm that the dye molecules are mono-disperse in the channels of MSS in terms of a blue-shift of UV-Vis absorption peak.Red-shift of 100 nm in the PL emission peak was observed for the composite material compared with the dyes in solid.In addition,the transparent DCM-MSS with an average diameter of 800 nm showed the strong photoluminescence properties.