College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:656-60. doi: 10.1016/j.saa.2013.11.091. Epub 2013 Nov 22.
A new 2-(2'-aminophenyl)benzimidazole (2-APBI) derivatized fluorescent sensor (L) that behaves relay recognition of Cu(2+) and S(2-) in water solution (pH 7.4) has been developed. Sensor L displays excited-state intramolecular proton transfer (ESIPT) featured two emission bands and performs highly selective and sensitive recognition to Cu(2+) through two emissions simultaneous quenching. The on-site formed L-Cu(2+) complex exhibits excellent selectivity to S(2-) with fluorescence "off-on" response via Cu(2+) displacement approach, which exerts ESIPT recovery. Thus, through modulation the ESIPT state of sensor L, relay recognition of Cu(2+) and S(2-) in water has been achieved.
一种新的 2-(2'-氨基苯基)苯并咪唑（2-APBI）衍生荧光传感器（L）在水溶液（pH 7.4）中对 Cu(2+)和 S(2-)表现出接力识别性能已经被开发出来。传感器 L 显示出激发态分子内质子转移（ESIPT）特征的两个发射带，并通过两个发射同时猝灭对 Cu(2+)进行高度选择性和灵敏的识别。现场形成的 L-Cu(2+)配合物通过 Cu(2+)置换方法对 S(2-)表现出优异的选择性荧光“关-开”响应，从而使 ESIPT 恢复。因此，通过调节传感器 L 的 ESIPT 状态，实现了水中对 Cu(2+)和 S(2-)的接力识别。
