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An unexpected dual-response pH probe based on acridine
Liang Xu1, Xiangzhen Yan2, Chunxue Yuan1
1College of Materials Science and Engineering, Tongji University Caoan Road 4800 Shanghai 201804 P. R. China cxyuan@tongji.edu.cn.
Abstract:
A new pH fluorescent probe 2,8-bis(acridin-9-ylethynyl)-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine (TBN), which has two acridine moieties attached to Tröger's base, is a useful fluorescent probe for monitoring extreme acidic and alkaline pH. TBN displays an excellent pH dependent behavior and responds linearly to extreme conditions in the pH ranges of 1.4-3.4 and 12.5-15.0. TBN can represent a novel type of fluorescent probe with perfect emission properties in extreme acidic and alkaline conditions by utilizing only one functional group.
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