[3PS-208]
Reversible Chemosensing with Self-Assembled Nanoporous Liquid Crystal Films of Cyanostilbene AIEgens
발표자성예빈 (전북대학교 )
연구책임자정광운 (전북대학교)
Abstract
We developed a reversible, sensitive nanoporous fluorescent film for acid-vapor sensing. An AIE-active cyanostilbene was complexed (1:1) with 4-(octyloxy) benzoic acid (C8OB) to form a smectic A mixture. The mixture was UV-cured at 365 nm with a diacrylate crosslinker to lock the layered structure. To create nanopores, C8OB was removed by alkaline extraction; pore formation was confirmed by FT-IR/SAXS, while the smectic order and alignment were retained. Trifluoroacetic acid caused a clear red shift in emission, which fully recovered after triethylamine treatment, giving a linear sub-ppm response. At 10 ppm, the planar-aligned film responded ~ 9 faster than the homeotropic film and remained stable over repeated cycles. Nanoporous sensing films with orientation-dependent sensitivity show excellent reversibility and durability and are promising real-time optical sensors for hazardous gases. This work is supported by the BK21 Four and the Mid-Career Researcher Program (RS-2021-NR059321).