SBA-15分子筛用于组装二溴对氯偶氮胂(英文)

USE OF MOLECULAR SIEVE SBA-15 FOR INCORPORATION OF DIBROMOCHLORO-ARSENAZO

以煅烧的分子筛SBA 15为主体材料,二溴对氯偶氮胂(dibromochloro-arsenazo,DBC-ASA)作客体材料,以水为介质,用液相移植法制备了(SBA 15)-(DBC-ASA)主客体复合材料。用粉末X射线衍射、Fourier变换红外光谱、固体扩散漫反射吸收光谱及发光研究表征了所制得的复合材料(SBA 15)-(DBC-ASA)的性质。X射线衍射结果表明:(SBA 15)-(DBC-ASA)主客体复合材料分子筛骨架存在且有序度高。红外光谱分析表明:较低量的DBC-ASA引入SBA 15分子筛中,分子筛骨架结构仍然存在,但引入量较大时,分子筛的骨架有序度明显降低。固体扩散漫反射吸收光谱研究表明:DBC-ASA处于分子筛SBA 15孔道内,分子筛孔道对DBC-ASA具有立体限域效应。发光光谱分析表明:所制得的样品的非辐射过程强,导致电子光子作用极强,产生电荷迁移和跃迁,发生Stokes位移,光谱谱带变宽。

Molecular sieve （SBA - 15）-（dibromochloro-arsenazo, DBC-ASA） host-guest composite materials were prepared by a liquid-phase grafting method using the calcined SBA - 15 molecular sieve as the host material, the DBC-ASA solution as the guest material, and water as the medium. The composite materials （SBA - 15）-（DBC-ASA） were characterized by X-ray diffraction（XRD）, Fourier transform infrared（FTIR）spectra, solid state diffuse reflectance absorption spectra, and luminescence studies. The XRD results show that the molecular sieve framework in the （SBA- 15）-（DBC-ASA） host-guest composite mate- rials is retained, and is highly ordered. The FTIR spectra indicate that the framework of the SBA- 15 molecular sieve is retanned when a small amount of DBC-ASA is incorporated into it, the order degree of the molecular sieve decreases when a large amount of DBC-ASA is incorporated into it. The solid state diffuse reflectance absorption spectra show that DBC-ASA is located in the channel of the SBA - 15 molecular sieve, and the channel of SBA - 15 has stereoconfinment. The luminescence spectra show a strong non-radiation transition processes in the prepared samples, and this results in very strong electron-photon interaction causing a charge transfer transition. The Stokes displacement takes place and the spectrum bands broaden.