A new pH-dependent fluorescence probe 2,8-bis((E)-4-([2,2':6',2″-terpyridin]-4'-yl)styryl)-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine (TBPTP) based on Tröger's base (TB) bound to terpyridine was designed and synthesized. Photophysical properties and titration experiments of TBPTP were investigated by absorption and fluorescence spectroscopy. TBPTP exhibited high sensitivity in an acidic environment with the working pH range 7.2-2.5, especially having a good liner response to pH changes in the range 2.5-4.3, which suggested that TBPTP is a good candidate for pH monitoring.

中文翻译：

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一种基于三联吡啶的关闭式荧光探针，用于pH监测。

新型的pH依赖性荧光探针2,8-bis（（E）-4-（[[2,2'：6'，2''-terpyridin] -4'-yl）styryl）-6H，12H-5,11设计并合成了基于特格格碱（TB）结合到叔吡啶的-methanodibenzo [b，f] [1,5]重氮电影（TBPTP）。通过吸收和荧光光谱研究了TBPTP的光物理性质和滴定实验。TBPTP在酸性环境中的工作pH范围为7.2-2.5时显示出高灵敏度，特别是对2.5-4.3范围内的pH变化具有良好的衬里响应，这表明TBPTP是pH监测的良好选择。