Effects of Gd3+ on Luminescence Properties of Eu3+ within Polymeric Structure in Aqueous Solutions

Abstract:2 , 6 , 2′, 6′-tetracarboxy-4 , 4′-bipyridine was synthesized and the luminescence enhancement of their Eu3+ complexes by Gd3+ was observed .The results indicate that the mechanism of enhancement is based on the formation of a polymeric structure where Eu3+ and Gd3+ are linked together by the ligands , which favours the consequent transfer of absorbed energy along the polymeric chain through several ligands toward the Eu3+.ProjectsupportedbytheNationalNaturalScienceFoundationofChina (2 970 10 0 6-HHS)andNaturalScienceFoundationofGuangdongProvinc

Synthesis of 3 or 4-Substituted Pyridine-2, 6-Dicarboxylic Acid Derivatives

the National Science Foundation of China !(grant 29701006 to HHS) ;the Nat

Studies on Electrochemical Synthesis of 4,5-Disubstituted-1,2- Benzoquinones and the Reaction Mechanism

邻苯二酚在不同亲核试剂存在下经电解氧化 ,一步合成了 4,5_二取代_1,2_苯醌类化合物 ;对电解氧化_迈克尔加成反应进行了探讨 ,提出了可能的反应历程 .The oxidation peak potentials( E p) of alinine derivates and catechol in 0.1 mol/L KCl+15% alcohol solution were measured by cyclic voltammograms technique. The electrochemical oxidation condition was set according to the E p. Three derivates of 4,5_disubstituted _1,2_benzoquinones were prepared via electrochemical oxidation_Michael addition reaction. The possible mechanism of electrochemical oxidation_Michael addition reaction is presented.作者联系地址：中山大学化学与化学工程学院!广东广州510275,中山大学化学与化学工程学院!广东广州510275,中山大学化学与化学工程学院!广东广州510275,中山大学化学与化学工程学院!广东广州510275,中山大学化学与化学工程学院!广东广州510275Author's Address: Inst.of Chem. and Chem. Engin. of Zhongshan Univ., Guangzhou 510275,China$$