A squaraine based fluorescent probe for mercury ion via coordination induced deaggregation signaling  

作　　者：Shuang-Yong Lin Hui-Jun Zhu Wen-Jian Xu Gui-Mei Wang Nan-Yan Fu 

机构地区：[1]Key Laboratory of Analysis and Detection for Food Safety,Ministry of Education & Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety,College of Chemistry and Chemical Engineering,and Department of Chemistry,Fuzhou University

出　　处：《Chinese Chemical Letters》2014年第9期1291-1295,共5页中国化学快报（英文版）

基　　金：financially supported by the National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China (No.J1103303);the National Natural Science Foundation of China (No.20702005);the Fujian Provincial Department of Science and Technology,China (No.2013Y0062);Funding (Type A) from Fujian Education Department,PR China (Nos.JA12038 and JA13043);the Science and Technology Development Fund of Fuzhou University,China (No.600902)

摘　　要：Due to the high affinity between dithiocarbamate （DTC） and Hg2＋, a fluorescent probe based on squaraine chromophore with DTC side arm for Hg2＋ via coordination induced deaggregation signaling has been designed and synthesized. Squaraine has a high tendency to aggregate in aqueous solution, and such self-aggregation usually results in a dramatic absorption spectral broadening with fluorescence emission quenching. The combination of the DTC side arm of the probe with Hg2＋ induces steric hindrance, leading to the deaggregation of the dye complex, companying with a fluorescence emission restoration. In EtOH-H2O （20：80, v/v） solution, this ＂turn on＂ fluorescent probe has high selectivity and sensitivity toward Hg2＋ over other metal ions, and the limit of detection for Hg2＋ was estimated as 2.19 × 10^-8 mol/L by 3σ/k.Due to the high affinity between dithiocarbamate （DTC） and Hg2＋, a fluorescent probe based on squaraine chromophore with DTC side arm for Hg2＋ via coordination induced deaggregation signaling has been designed and synthesized. Squaraine has a high tendency to aggregate in aqueous solution, and such self-aggregation usually results in a dramatic absorption spectral broadening with fluorescence emission quenching. The combination of the DTC side arm of the probe with Hg2＋ induces steric hindrance, leading to the deaggregation of the dye complex, companying with a fluorescence emission restoration. In EtOH-H2O （20：80, v/v） solution, this ＂turn on＂ fluorescent probe has high selectivity and sensitivity toward Hg2＋ over other metal ions, and the limit of detection for Hg2＋ was estimated as 2.19 × 10^-8 mol/L by 3σ/k.

关 键 词：Squaraine dye Fluorescent probe Coordination induced deaggregation Mercury ion detection 

分 类 号：O614.243[理学—无机化学] Q523[理学—化学]