Studies on the Transition Metal Ion Induced Fluorescence Enhancement of 1,8-Naphthalimide Derivatives  

作　　者：文国涛 朱满洲 王卓 孟祥明 胡惠媛 郭庆祥 

机构地区：[1]Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China

出　　处：《Chinese Journal of Chemistry》2006年第9期1230-1237,共8页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Nos. 20332020.20472079）. Dedicated to Professor Xikui Jiang on the occasion of his 80th birthday.

摘　　要：Two fluorosensor systems have been designed and synthesized with their photophysical properties and fluorescence responses toward the transition metal ions studied. The fluorosensor was composed of 1,8-naphthalimide and 4-chloro-1,8-naphthalimide as fluorophore respectively, an amino moiety as the receptor and a hydrocarbon chain as the spacer to link the fluorophore and receptor. Fluorescence intensity of these systems is very weak due to the process of the efficient intramolecular photoinduced electron transfer （PET） in the absence of metal ions. Titration of the transition metal ions can switch on the fluorescence immediately. The intensity of released fluorescence is even higher than the expected from the consideration of the PET in these systems. It may be rationalized that the receptor bound to transition metal ions and the solvation of the fluorophore by the water molecules from the hydrated transition metal salts, may significantly cause fluorescence enhancement.Two fluorosensor systems have been designed and synthesized with their photophysical properties and fluorescence responses toward the transition metal ions studied. The fluorosensor was composed of 1,8-naphthalimide and 4-chloro-1,8-naphthalimide as fluorophore respectively, an amino moiety as the receptor and a hydrocarbon chain as the spacer to link the fluorophore and receptor. Fluorescence intensity of these systems is very weak due to the process of the efficient intramolecular photoinduced electron transfer （PET） in the absence of metal ions. Titration of the transition metal ions can switch on the fluorescence immediately. The intensity of released fluorescence is even higher than the expected from the consideration of the PET in these systems. It may be rationalized that the receptor bound to transition metal ions and the solvation of the fluorophore by the water molecules from the hydrated transition metal salts, may significantly cause fluorescence enhancement.

关 键 词：1 8-NAPHTHALIMIDE photoinduced electron transfer fluorescence enhancement fluorescent sensor 

分 类 号：O625.6[理学—有机化学] O621.22[理学—化学]