发光学报2017，Vol.38Issue(8)：1109-1116,8.DOI:10.3788/fgxb20173808.1109
氧化偶氮苯双席夫碱化合物对Cu2+的比色识别
Highly Selective Colorimetric Recognition of Copper Ions Based on Bis-Schiff Base Containing An Azoxy Group
摘要
Abstract
In order to obtain copper ion sensors, a bis-Schiff base containing an azoxy group was synthesized.The complexation effect of the compound on Cu2+ was studied, and the interference of 23 metal ions such as As3+, Mo6+, Mn2+, Zn2+, Fe3+, Pb2+, Al3+, Hg2+, Ni2+, Pt4+, Mg2+, Be2+, Sr2+, Cs+, Os4+, Cd2+, Se4+, Cr6+, Co2+, Rb+, Ba2+, V6+, Ca2+ was also studied in MeOH-H2O by UV-Vis spectroscopy.Job-plot method was used to study the ratio of the Cu2+ complex with the compound.The cooperation mechanism was studied by infrared spectrometry, and the "off-on" nature of the compound with copper ion was studied in EDTA.The results indicate that the bis-Schiff base has a large conjugated system, the structure is novel and stable.The bis-Schiff base shows a highly selective response to Cu2+. A clear color change from colorless to yellow is observed upon the addition of Cu2+ to the solution of the receptor in MeOH by naked-eyes and a single selectivity colorimetric recognition.The Job-plot shows that the bis-Schiff base coordinates with Cu2+ to form 1∶1 stable luminescent complex.The UV absorbance of the system shows a good linear relationship with Cu2+ concentration within 1.32-13.0 μmol·L-1, and the detection limit is 2.6×10-7 mol·L-1.The sensing of Cu2+ by this sensor is found to be reversible with the Cu2+ induced color being lost upon the addition of EDTA.The process of titrating Compound 1 with Cu2+ is reversible, and Compound 1 can be used as an off-on switch chemosensor.The complexation mechanism of Compound 1 and Cu2+ was studied by IR spectroscopy, and the binding sites of compound 1 and Cu2+ were identified.关键词
双席夫碱/氧化偶氮/Cu2+/比色识别Key words
bis-Schiff base/azoxy/copper ion/colorimetric recognition分类
化学化工引用本文复制引用
吕蕾,盛野,郑松志,苏冉,安胜姬..氧化偶氮苯双席夫碱化合物对Cu2+的比色识别[J].发光学报,2017,38(8):1109-1116,8.基金项目
国家自然科学基金国家基础科学人才培养基金(J1103302)资助项目 Supported by National Science Foundation for Fostering Talents in Basic Research of The National Natural Science Foundation of China(GJ1103302) （J1103302）
