具有1-脱氮嘌呤骨架的简单多响应二茂铁受体对Pb(II)离子的三通道传感

Triple channel sensing of Pb(II) ions by a simple multiresponsive ferrocene receptor having a 1-deazapurine backbone.

作者信息

Zapata Fabiola, Caballero Antonio, Espinosa Arturo, Tarraga Alberto, Molina Pedro

机构信息

Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain.

出版信息

Org Lett. 2008 Jan 3;10(1):41-4. doi: 10.1021/ol702541y. Epub 2007 Dec 5.

DOI:10.1021/ol702541y

PMID:18052288

Abstract

A new redox, chromogenic, and fluorescent chemosensor molecule based on a deazapurine ring selectively senses aqueous Pb2+ in acetonitrile over other metal ions examined: redox shift (DeltaE1/2 = 0.15 V of the Fe(II)/Fe(III) redox couple), the colorless to orange color change, and an emission change of 620-fold, with an unprecedented detection limit of 2.7 microg L-1. The signal transduction occurs via a reversible CHEF with this inherent quenching metal ion.

摘要

一种基于脱氮嘌呤环的新型氧化还原、显色和荧光化学传感器分子，在乙腈中能选择性地检测水溶液中的Pb2+，优于所检测的其他金属离子：氧化还原电位移动（Fe(II)/Fe(III)氧化还原对的ΔE1/2 = 0.15 V），颜色由无色变为橙色，发射变化达620倍，检测限低至2.7 μg L-1，前所未有的低。信号转导通过与这种固有猝灭金属离子的可逆化学增强荧光（CHEF）发生。