Luminescence of Nanosized Supramolecular Material of Mesoporous Molecular Sieve and Terbium Complex

作     者：尹伟 张迈生 康北笙 

作者机构：School of Chemistry and Chemical EngineeringSun Yat-Sen (zhongshan) University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2003年第21卷第S1期

页      面：41-44页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：ProjectsupportedbytheScienceFoundationofGuangdongProvince (960 0 78)  theScienceFoundationofGuangzhouCity(2 0 0 0 Z 0 76 0 1)  LaboratoryofRareEarthChemistryandPhysics  ChangchunInstitutionofAppliedChemistry  ChineseAcademyofSciencesandKeyLaboratoryofIn 

主　　题：MCM-41 (CH_3)_3Si-MCM-41 lupramolecular system luminescence exponential decay rare earths 

摘      要：Among rare earth complexes Tb(Phen)_ x (Bipy)_((4- x ))(NO_3)_3 ( x =4,3,2,1,0) solutions (1×10 (-3) (mol·L (-1)),) the fluorescent intensity of Tb (3+) in Tb(Phen)_3(Bipy)(NO_3)_3 is strongest and that of Tb (3+) in Tb(Bipy)_4(NO_3)_3 is weakest. The fluorescent intensity of Tb (3+) in (CH_3)_3Si-MCM-41-Tb(Bipy)_4(NO_3)_3 is strongest and that of Tb (3+) in MCM-41-Tb(Phen)_3(Bipy)(NO_3)_3 or (CH_3)_3Si-MCM-41-Tb(Phen)_3(Bipy)(NO_3)_3 becomes very weak. Luminescence supramolecular nanostructured materials that the guests Tb(Phen)_4(NO_3)_3 and Tb(Bipy)_4(NO_3)_3 were encapsulated in the non-polar channels of (CH_3)_3Si-MCM-41 are stronger than that encapsulated in the polar channels of MCM-41. When the guests are Tb(Phen)_3(Bipy)(NO_3)_3 and Tb(Phen)_2(Bipy)_2(NO_3)_3,the result is just opposite. The results were proved by fluorescent lifetime experiments. MCM-41-Tb(Phen)(Bipy)_3(NO_3)_3 shows two distinct exponential decays,which time constants are 168.8 and 641.1 μs and its amplitude ratio is 0.96∶1. The same as (CH_3)_3Si-MCM-41-Tb(Phen)(Bipy)_3(NO_3)_3 shows,of which are 73.2 and 590.4 μs and the amplitude ratio is 2.3∶1. The ratios of decay time and luminescence intensity of the both supramolecular systems are 2.5∶1,1∶2.5 and 1.1∶1,0.96∶1,respectively. These results indicate that interaction and selectivity between host and guest influence greatly luminescent properties of supramolecular system.