A Terpyridine Based 1,2,3-Triazol-1,4-diyl-Fluoroionophore-A Fluorometric Study Towards 3d Metal Ions in Acetonitrile.

IF 2.5 4区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Thomas Schwarze, Holger Müller, Eric Sperlich, Alexandra Kelling, Hans-Jürgen Holdt
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引用次数: 0

Abstract

In this paper, we report on the sensing role of the 1,2,3-triazol unit in a 1,4-diyl arrangement in a fully π-conjugated fluorescent probe 1 (cf. Scheme 1) towards the fluorometric detection of 3d metal ions. The 1,2,3-triazol-1,4-diyl-fluoroionophore 1 was designed in a donor(D)-acceptor(A) arrangement with a 1,2,3-triazol unit as a π-linker between a terpyridine (A) ionophore and a diethylaminocoumarin (D) fluorophore to study the fluorescence behavior towards the divalent 3d metal ions Mn2+, Fe2+, Co2+, Ni2+, Cu2+ and Zn2+. This fluoroionophore 1 is based on an intramolecular charge transfer (ICT) and shows a moderate quantum yield (φf) of 0.508 in acetonitrile. A modulation of the ICT process in 1 through Fe2+, Co2+, Cu2+, Ni2+ and Zn2+ leads to a small red shift of the lowest energetically lying absorption UV/Vis absorption band and to a very strong 3d metal ion induced fluorescence quenching. It should be considered, that the installation of a 1,2,3-triazole unit as a fully π-linker in ICT probes originates no ratiometric fluorescence response towards Fe2+, Co2+, Cu2+, Ni2+ and Zn2+.

一种基于 Terpyridine 的 1,2,3-三唑-1,4-二基荧光团--对乙腈中 3d 金属离子的荧光测定研究。
在本文中,我们报道了1,4-二基排列的1,2,3-三唑单元在全π共轭荧光探针1(参见方案1)中对三维金属离子的荧光检测的传感作用。以1,2,3-三唑-1,4-二基氟离子载体1为供体(D)-受体(a)结构,以1,2,3-三唑作为三吡啶(a)离子载体与二乙基氨基香木素(D)荧光载体之间的π连接体,研究其对Mn2+、Fe2+、Co2+、Ni2+、Cu2+和Zn2+等二价三维金属离子的荧光行为。该氟离子团1基于分子内电荷转移(ICT),在乙腈中的量子产率(φf)为0.508。通过Fe2+, Co2+, Cu2+, Ni2+和Zn2+调制1中的ICT过程导致最低能量吸收UV/Vis吸收带的小红移和非常强的3d金属离子诱导荧光猝灭。应该考虑的是,在ICT探针中安装1,2,3-三唑单元作为全π连接剂,对Fe2+、Co2+、Cu2+、Ni2+和Zn2+没有产生比例荧光响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ChemistryOpen
ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
4.80
自引率
4.30%
发文量
143
审稿时长
1 months
期刊介绍: ChemistryOpen is a multidisciplinary, gold-road open-access, international forum for the publication of outstanding Reviews, Full Papers, and Communications from all areas of chemistry and related fields. It is co-owned by 16 continental European Chemical Societies, who have banded together in the alliance called ChemPubSoc Europe for the purpose of publishing high-quality journals in the field of chemistry and its border disciplines. As some of the governments of the countries represented in ChemPubSoc Europe have strongly recommended that the research conducted with their funding is freely accessible for all readers (Open Access), ChemPubSoc Europe was concerned that no journal for which the ethical standards were monitored by a chemical society was available for such papers. ChemistryOpen fills this gap.
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