The family of conjugated polymers known as polydiacetylenes (PDAs) has been extensively utilized in designing stimuli-responsive colorimetric and fluorometric sensors. In the current study, we have developed highly sensitive and rapidly responsive colorimetric chemosensors composed of PDAs bearing imidazole (PDA-Im) and triazole (PDA-Ta) head groups for the determination of pH and the detection of HCl gas. In solution, PDA-Im and PDA-Ta display distinct colorimetric changes from blue to red accordingly in response to pH changes. Also, a PDA-Im film was fabricated to detect HCl by a visibly observed blue-to-red color change.
Bibliographical noteFunding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (the National Creative Research Initiative: No. 2012R1A3A2048814) for J. Y. and the Ministry of Education (No. 2017R1A6A3A04004954) for S. L. Mass spectral data were obtained from the Korea Basic Science Institute (Daegu) using a JEOL JMS 700 high-resolution mass spectrometer.
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