Novel fluorescent pH sensor based on coumarin with piperazine and imidazole substituents

被引：49
作者：
Saleh, Na'il [1 ]
Al-Soud, Yaseen A. [2 ]
Nau, Werner M. [3 ]
机构：
[1] Yarmouk Univ, Dept Chem, Irbid 21163, Jordan
[2] Univ Al Al Bayt, Dept Chem, Al Mafraq, Jordan
[3] Jacobs Univ Bremen, Sch Sci & Engn, D-28759 Bremen, Germany
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2008年 / 71卷 / 03期
关键词：
Fluorescent multiple pH sensors; Photoinduced electron transfer (PET); Coumarin; Piperazine; Imidazole;
D O I：
10.1016/j.saa.2008.02.004
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A new coumarin derivative containing piperazine and imidazole moieties is reported as a fluorophore for hydrogen ions sensing. The fluorescence enhancement of the studied sensor with an increase in hydrogen ions concentration is based on the hindering of photoinduced electron transfer from the piperazinyl amine and the imidazolyl amine to the coumarin fluorophore by protonation. The presented sensor has a novel design of fluorophore-spacer-receptor(1)-receptor(2) format, which is proposed to sense two ranges of pH (front 2.5 to 5.5) and (front 10 to 12) instead of sensing one pH range. A model compound. in which the piperaziny ring is absent, was synthesized as well to confirm the novel pH sensing of the proposed sensor. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：818 / 822
页数：5
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