A novel pH sensor which could respond to multi-scale pH changes via different fluorescence emissions

作者：Zhu, Xin; Lin, Qi^*; Chen, Pei; Fu, Yong-Peng; Zhang, You-Ming; Wei, Tai-Bao^*

来源：New Journal of Chemistry, 2016, 40(5): 4562-4565.

DOI：10.1039/c5nj03114a

• RATIOMETRIC CHEMOSENSOR
• TRANSITION
• CYANIDE
• PROBE

This paper describes the design and synthesis of a multi-scale pH chemosensor L6 based on the ICT-TICT (an intramolecular charge transfer and a twisted intramolecular charge transfer) state change mechanism. Sensor L6 exhibited two obvious pH jumps (pH ranged from 3.0 to 5.0 and 8.5 to 10.5) among the different pH ranges. Thus, sensor L6 could perform over a broad pH range including acidic, neutral and alkaline ranges by exhibiting different fluorescence emissions (blue at pH 1.0-3.0, green at pH 4.5-8.5 and quenching at pH 10.5-13.5). Interestingly, owing to the sensor's relatively high water solubility, the whole sensing process could be observed successfully in a DMSO/H2O (v/v, 1/9) aqueous solution. These properties mean sensor L6 has the potential to monitor pH variations over the entire physiological pH range (4.5-8.5).

• 出版日期2016
• 单位西北师范大学