带有羧基部分的冠醚螺吡喃氟离子载体用于锂离子的选择性检测。

Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions.

作者信息

Stubing D B, Heng S, Abell A D

机构信息

ARC Centre of Excellence for Nanoscale BioPhotonics, Institute of Photonics and Advanced Sensing, Department of Chemistry, The University of Adelaide, South Australia, 5005, Australia.

出版信息

Org Biomol Chem. 2016 Apr 12;14(15):3752-7. doi: 10.1039/c6ob00468g.

DOI:10.1039/c6ob00468g

PMID:27001932

Abstract

The absorbance and fluorescence spectra of carboxylated spiropyrans containing methyl-1-aza-12-crown-4, methyl-1-aza-15-crown-5, methyl-1-aza-18-crown-6 moieties are compared. Characteristic changes in spectra after addition of the alkali metal salts of Li(+), Na(+), K(+) and Cs(+) were observed. Chromism induced by the binding of the metal cations was observed as an increase in absorbance and fluorescence. Of these metal cations, the Li(+) ion produced the largest change in all three spiropyran systems. Reversible photoswitching of the spiropyran-metal complexes was observed on irradiation with alternating 352 nm UV and white light. This results in reversible fluorescence based sensing of lithium ions with potential for use in a biological sensor device.

摘要

比较了含有甲基 - 1 - 氮杂 - 12 - 冠 - 4、甲基 - 1 - 氮杂 - 15 - 冠 - 5、甲基 - 1 - 氮杂 - 18 - 冠 - 6 部分的羧化螺吡喃的吸收光谱和荧光光谱。观察到添加 Li(+)、Na(+)、K(+) 和 Cs(+) 的碱金属盐后光谱的特征变化。观察到由于金属阳离子结合引起的变色表现为吸收和荧光的增加。在这些金属阳离子中，Li(+) 离子在所有三种螺吡喃体系中产生的变化最大。在用交替的 352 nm 紫外光和白光照射时，观察到螺吡喃 - 金属配合物的可逆光开关现象。这导致基于可逆荧光的锂离子传感，具有用于生物传感装置的潜力。