Covalent organic hollow nanospheres constructed by using AIEactive units for nitrophenol explosives detection  

作　　者：Shan Jiang Shengda Liu Lingchen Meng Qingkai Qi Lipeng Wang Bin Xu Junqiu Liu Wenjing Tian 

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials,Jilin University,Changchun 130000,China

出　　处：《Science China Chemistry》2020年第4期497-503,共7页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China(21835001,51773080,21674041,51573068,21221063);Program for Changbaishan Scholars of Jilin Province,Jilin Province Project(20160101305JC);the“Talents Cultivation Program”of Jilin University.

摘　　要：The development of conjugated nanomaterials with high sensitivity and super-amplified quenching effect for the detection of nitrophenol explosives is still a great challenge. Herein, we developed conjugated hollow nanospheres constructed by using aggregation-induced emission(AIE) active 1,3,5-tris(4-formyl-phenyl)benzene(TFPB). The high emission hollow nanospheres with uniform size and admirable dispersiveness exhibited obvious fluorescence quenching response with the addition of nitrophenol explosives owing to the photoinduced electron transfer(PET) from the hollow nanospheres to nitrophenol explosives. The Stern-Volmer constants of hollow spheres for 2,4,6-trinitrophenol(TNP), 4-nitrophenol(NP) and 2,4-dinitrophenol(DNP) can reach 9.67×10^5, 3.14×10^5 and 4.8×10^4 M-1, respectively. Furthermore, the handy test paper coated with hollow nanospheres was prepared and showed a good response toward TNP solutions and vapor. The study provides a novel strategy to construct AIE-active conjugated hollow nanospheres for efficient nitrophenol explosives sensing.The development of conjugated nanomaterials with high sensitivity and super-amplified quenching effect for the detection of nitrophenol explosives is still a great challenge. Herein, we developed conjugated hollow nanospheres constructed by using aggregation-induced emission（AIE） active 1,3,5-tris（4-formyl-phenyl）benzene（TFPB）. The high emission hollow nanospheres with uniform size and admirable dispersiveness exhibited obvious fluorescence quenching response with the addition of nitrophenol explosives owing to the photoinduced electron transfer（PET） from the hollow nanospheres to nitrophenol explosives. The Stern-Volmer constants of hollow spheres for 2,4,6-trinitrophenol（TNP）, 4-nitrophenol（NP） and 2,4-dinitrophenol（DNP） can reach 9.67×105, 3.14×105 and 4.8×104 M-1, respectively. Furthermore, the handy test paper coated with hollow nanospheres was prepared and showed a good response toward TNP solutions and vapor. The study provides a novel strategy to construct AIE-active conjugated hollow nanospheres for efficient nitrophenol explosives sensing.

关 键 词：aggregation-induced emission COVALENT ORGANIC NANOSPHERES NITROPHENOL explosives detection fluorescence QUENCHING 

分 类 号：TQ560.72[化学工程—炸药化工]