Stimuli-Responsive Optical Sensors from Hydrogen-Bondable Cyanostilbene Based Monomers.
발표자
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초록
내용
To fabricate an organic fluorescent film with a two-dimensional nanoporous structure that responds to trifluoroacetic acid (TFA), a pyridyl cyanostilbene core linked by a polymerizable chain (PCM) was newly designed and synthesized. The synthesized PCM exhibited aggregation induced emission (AIE) and reversibly response to acid/base. The PCM with the H-bonded acceptor and 8OB with the H-bonded donor were formed in a 1:1 complex through H-bonding. As a result, the PCM-8OB complex with a similar shape to a rod-like liquid crystal has a smectic mesophase. The two-dimensional nanoporous structure was made through photopolymerization and subsequently removing 8OB. Interestingly, the fabricated sensing films showed different sensitivities to TFA depending on the organized direction of nanoporous structure. We developed a new optical sensor that can display the risk level according to the concentration of TFA in the air using this sensitivity difference. This work was supported by Mid-Career Researcher Program (2021R1A2C2009423).