A Fluorescent Chemosensor for Dihydrogen Phosphate Ion Based on 2-[2-Hydroxy-4-(diethylamino)phenyl]-1Himidazo[4,5-b]phenazine-Fe^(3+)Ensemble  

作　　者：Taibao Wei Guiyuan Wu Bingbing Shi Qi Lin Hong Yao Youming Zhang 

机构地区：[1]Key Laboratory of Eco-Environment-Related Polymer Materials,Ministry of Education of China,Key Laboratory of Polymer Materials of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou,Gansu 730070,China

出　　处：《Chinese Journal of Chemistry》2014年第12期1238-1244,共7页中国化学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.21064006,21262032 and 21161018);the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(No.IRT1177);the Natural Science Foundation of Gansu Province(No.1010RJZA018);the Youth Foundation of Gansu Province(No.2011GS04735);NWNU-LKQN-11-32.

摘　　要：A long wavelength emission fluorescent(612 nm)chemosensor with high selectivity for H_(2)PO_(4)^(−)ions was designed and synthesized according to the excited state intramolecular proton transfer(ESIPT).The sensor can exist in two tautomeric forms(‘keto’and‘enol’)in the presence of Fe^(3+)ion,Fe^(3+)may bind with the‘keto’form of the sensor.Furthermore,the in situ generated GY-Fe^(3+)ensemble could recover the quenched fluorescence upon the addition of H_(2)PO_(4)^(−)anion resulting in an off-on-type sensing with a detection limit of micromolar range in the same medium,and other anions,including F^(−),Cl^(−),Br^(−),I^(−),AcO^(−),HSO^(−)_(4),ClO^(−)_(4)and CN−had nearly no influence on the probing behavior.The test strips based on 2-[2-hydroxy-4-(diethylamino)phenyl]-1H-imidazo[4,5-b]phenazine and Fe^(3+)metal complex(GY-Fe^(3+))were fabricated,which could act as convenient and efficient H_(2)PO_(4)^(−)test kits.

关 键 词：long wavelength fluorescent Fe^(3+)ion H_(2)PO_(4)^(−) 1H-imidazo[4 5-b]phenazine 

分 类 号：O62[理学—有机化学]