摘要
本论文分为三部分,分别为MCM-41与8-羟基喹啉铝复合发光材料的制备、MCM-41与苯甲酸铕无机-有机杂化材料的合成、MCM-41与激光染料的组装,通过采用XRD、IR、N_2吸附-脱附、荧光光谱等测试方法对合成样品进行表征,着重对样品的光谱性能进行了研究。
1、室温条件下合成出高度有序的介孔材料MCM-41,并将有机发光小分子8-羟基喹啉铝(Alq3)组装进介孔MCM-41中,测试结果表明组装体保持了有序的介孔骨架结构,主客体之间存在较强的结合力,并且组装体具有优异的发光性能。
2、将稀土有机配合物Eu(BA)_3组装进介孔MCM-41中,得到有机-无机杂化介孔材料Eu(BA)_3-MCM-41。结果表明,孔道中引入的Eu(BA)_3充当了二次模板剂的作用,并且Eu(BA)_3与-OH在介孔孔道中成键,组装体较Eu(BA)_3发光强度大大提高。
3、将激光染料与介孔MCM-41组装后得到了介孔组装体,测试结果表明组装体仍保持了六方介孔结构,但染料分子的进入降低了介孔孔道结构的有序性,并且在组装的过程中,染料分子与介孔孔道中的-OH成键,组装体具有优异的发光性能,并具有良好的稳定性。复合染料组装体较单一染料组装体具有更强的荧光效应。
There are three parts in this paper: The synthesis of luminescent Alq3-MCM-41 assembly, the organic-inorganic hybrid Eu(BA)_3-MCM-41 assembly, and the assembly of MCM-41 and the fluorescence dyes. The products were characterized by small angle XRD, IR, Excitation-emission spectra and N_2 adsorption-desorption, and the spectra properties were mainly studied.
1. Small organic luminescent molecule of 8-hydroxyquinoline aluminum (Alq3) as an active optical guest was incorporated into the one-dimension channels of MCM-41. The results from XRD patterns suggest that the Alq3-MCM-41 also have the typical mesoporous structure, but the channels were partially destroyed by the entrance of Alq3. The appearance of absorption band at 1 542cm-1 shows that there is strong binding force between MCM-41 and Alq3 in the assembly. Alq3-MCM-41 has excellent luminescent property owing to the energy transfer between the host and the guest, which is mainly due to the mutual effect of the hybrid inorganic-organic material.
2. Eu(BA)_3 was assemblied into the channels of MCM-41 directly, then the organic-inorganic hybrid material Eu(BA)_3-MCM-41 was gained. The results indicate that the assembly have more ordered mesoporous structure than MCM-41. Eu(BA)_3 can act as a secondary template when it enters the channel and increase the ordered framework of mesoporous silicon. Eu(BA)_3 can be bonded with the hydroxyl in the channel. The relative luminescent intensity of the peak at 610.2nm which belongs to the transition of 5D0→7F2 of Eu~(3+) is up to 2 859.4 in the assembly, and it is 299% times more than that of Eu(BA)_3.
3. Luminescent dyes like RhB, Rh6G and the mixture were assemblied with mesoporous material MCM-41, and the assemblies were synthesized. The results show that the assembly remains the hexagonal structure of MCM-41, which reduces in a certain degree as the entrance of the dye molecules. The dyes can be bonded with the hydroxyl of MCM-41, so the assembly exhibits a good fluorescent property. The assembly of mixed dyes has a stronger luminescence than that of single dye.
引文
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