L-丝氨酸为桥联剂构筑稀土配合物MCM-41基质复合型介孔发光材料

Construction of Luminescent Lanthanide Complex /MCM-41 Hybird Mesoporous Material by L-serine Acting as Molecular Bridge

氨基酸分子首次用以制备构筑稀土介孔发光材料。L-丝氨酸通过分子修饰得到新配体2-烟酰氨基-3-羟基丙酸(L),并进一步引入MCM-41介孔基质中,最后和稀土Tb3+离子复合得发光介孔材料Tb-L-MCM-41。通过核磁共振、紫外、XRD、氮吸附和荧光光谱等对配体和杂化材料的结构和性质进行了表征。结果表明,配体L很好的引入到MCM-41介孔基质中,Tb-LMCM-41介孔材料呈现L的特征紫外吸收。同时,稀土配合物的引入占据了MCM-41基质的部分孔道,使其比表面和孔体积都有所降度。Tb-L-MCM-41呈现稀土Tb3+离子的特征光。

The amino acid molecule was first used to construct luminescent lanthanide-based mesoporous materials. L-serine was modified and the novel ligand HNPA = 3-hydroxy-2-（ nicotinamido） propanoic acid was synthesized. The ligand was introduced into MCM-41 host,and further reacted with Tb3 ＋ions to form luminescent mesoporous material Tb-L-MCM-41. The ligand and Tb-L-MCM-41 were investigated by NMR,UV,XRD,N2 adsorption /desorption and fluorescent spectra. The results indicated the novel ligand has been introduced into the mesoporous material system,and Tb-L-MCM-41 exhibits the characteristic absorption of ligand. In addition,the incorporation of the complexes reduces the diameter of the micelles of MCM-41 host,as a result,the surface area and pore volume were decreased. Tb-L-MCM-41 shows the characteristic emission of Tb3 ＋ions.