D-π-A型偶氮苯酚探针对氟离子的比色识别  

Colorimetric recognition of D-π-A azophenol probe for fluoride anion

作　　者：宋秀美 余彪 何清运 席艳杰 韩冰 冯宗财 SONG Xiu-mei;YU Biao;HE Qing-yun;XI Yan-jie;HAN Bing;FENG Zong-cai(Institute for Advanced Materials,Lingnan Normal University,Zhanjiang 524048,China;School of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang 524048,China)

机构地区：[1]岭南师范学院新材料研究院,广东湛江524048 [2]岭南师范学院化学化工学院,广东湛江524048

出　　处：《化学研究与应用》2020年第6期924-932,共9页Chemical Research and Application

基　　金：国家自然科学基金项目(21805125)资助;湛江市科技计划项目(2015A020203)资助。

摘　　要：设计合成系列D-π-A偶氮苯酚探针,利用紫外-可见光谱对F^-、Cl^-、Br^-、I^-、HSO4^-、H2PO4^-、NO3^-和AcO^-阴离子进行识别,考察探针电子结构和空间位阻对F^-识别能力的影响。结果表明,在乙腈中P1~P4对F^-能选择性地识别,检测限达到0.10~0.63μmol·L^-1(1.90~11.97 ppm),探针分子与F^-形成的络合物共轭程度增大有利于对F^-识别,识别基团邻位取代基团空间位阻对F^-识别并不产生明显的影响。1H NMR滴定表明识别机理为探针分子酚羟基与F^-通过氢键结合形成1∶1络合物。A serials of probes P1~P4 based on azophenol had been designed and synthesized,then used to detect F^-,Cl^-,Br^-,I^-,HSO4^-,H2PO4-,NO3^-and AcO-anions by UV-visible absorption spectrum.The effects of probe electrons structure and steric hindrance on F-recognition were investigated.The probes in CH 3CN exhibited high sensitivity for F^-.The detection limit of P1~P4 were determined to be 0.10~0.63μmol·L^-1(1.90~11.97 ppm)for F^-.The increasing of the conjugation degree of the complex composed by probe and F-was conducive to F^-recognition.However,the steric resistance of the ortho-substituted groups of the recognition group had no obvious influence on F^-recognition.1H NMR titration had been performed to establish the proposed reaction mechanism,which was considered to be direct consequence of hydrogen-bond formation between phenolic group of probe and F^-.

关 键 词：偶氮苯酚 比色法 探针 氟离子 

分 类 号：O621.2[理学—有机化学]