A novel pH sensor which could respond to multi-scale pH changes via different fluorescence emissions. (21st March 2016)

• Record Type: Journal Article
• Authors: Zhu, Xin; Lin, Qi; Chen, Pei; Fu, Yong-Peng; Zhang, You-Ming; Wei, Tai-Bao
• Is Part Of: New journal of chemistry. Volume 40:Number 5(2016:May)
• Page Start: 4562
• Page End: 4565
• Publication Date: 2016-03-21
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c5nj03114a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : SensorL6 exhibited two obvious pH jumps and could respond to multi-scale pH changes via different fluorescence emissions and colors. Abstract : This paper describes the design and synthesis of a multi-scale pH chemosensorL6 based on the ICT-TICT (an intramolecular charge transfer and a twisted intramolecular charge transfer) state change mechanism. SensorL6 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, sensorL6 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/H2 O (v/v, 1/9) aqueous solution. These properties mean sensorL6 has the potential to monitor pH variations over the entire physiological pH range (4.5–8.5).