Acidic-sensing property of 9-(cycloheptatrienylidene)fluorene by UV-Vis spectroscopy

被引：15

作者：

Wang, ZX ^{[1
]}

Li, W ^{[1
]}

Lu, P ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2004年 / 99卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

acidic sensor; 9-(cycloheptatrienylidene)fluorene;

D O I：

10.1016/j.snb.2003.11.021

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

From the UV-Vis absorption spectra based on the variety acidity, a pH-dependent reversible equilibrium between 9-(cycloheptatrienylidene)fluorene (1) and its protonated form (I-H+) has been established in a mixture of concentrated sulfuric acid and ethanol system. Three clear isosbestic points (235, 258 and 316 nm) were observed in the UV-Vis spectra. It shows clearly that the structural change between I and I-H+ can serve as an effective candidate for pH-indicator, and might be used as pH-dependent molecular sensor. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：264 / 266

页数：3

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