Synthesis of 1,8-naphthalimide-based fluorescent nano-probes and their application in pH detection  

作　　者：Langping Zhou Zechen Jin Xiaoxiang Fan Yuhua Yao Zhaoyang Chen Weibing Zhang Junhong Qian 

机构地区：[1]Shanghai Key Laboratory of Functional Materials Chemistry,School of Chemistry & Molecular Engineering,East China University of Science and Technology

出　　处：《Chinese Chemical Letters》2018年第10期1500-1502,共3页中国化学快报（英文版）

基　　金：financial support from the National Natural Science Foundation of China (No. 21576085)

摘　　要：Two kinds of fluorescent nano-probes（pH-A and pH-B） with different diameters for the determination of H＋concentration, based on photo-induced electron transfer mechanism, were synthesized through click reaction. In which 1,8-naphthalimide was employed as the fluorophore and N,N-dimethylethylenediamine as the receptor. The effects of particle size and linker length on the photophysical properties of the probe were studied. The results revealed that the nano-probes were more sensitive toward pH with increasing particle size. The fluorescence intensity at 529 nm（I529） of the nano-probe p H-A of 120 nm exhibited good linear relationship with solution＇s pH in the range of 6–8. The probe p H-A displayed excellent selectivity and competition toward proton over other possible coexisted ions, and it could be applied to detect pH in realistic samples（river water, urine）.Two kinds of fluorescent nano-probes（pH-A and pH-B） with different diameters for the determination of H＋concentration, based on photo-induced electron transfer mechanism, were synthesized through click reaction. In which 1,8-naphthalimide was employed as the fluorophore and N,N-dimethylethylenediamine as the receptor. The effects of particle size and linker length on the photophysical properties of the probe were studied. The results revealed that the nano-probes were more sensitive toward pH with increasing particle size. The fluorescence intensity at 529 nm（I529） of the nano-probe p H-A of 120 nm exhibited good linear relationship with solution＇s pH in the range of 6–8. The probe p H-A displayed excellent selectivity and competition toward proton over other possible coexisted ions, and it could be applied to detect pH in realistic samples（river water, urine）.

关 键 词：Fluorescent probe NANO-PARTICLES NAPHTHALIMIDE pH detection Realistic samples 

分 类 号：O657.3[理学—分析化学]