Details

Autor(en) / Beteiligte

• Jang, Junhwa
• Koo, Jahyeon
• Oh, Mintaek
• Wi, Youngjae
• Yu, Dongmin
• Hyeong, Jaeseok
• Jang, Eunji
• Ko, Hyeyoon
• Rim, Minwoo
• Jeong, Kwang‐Un

Titel

Self‐Assembled and Polymerized Hierarchical Nanostructure Films of Cyanostilbene‐Based Reactive AIEgens for Smart Chemosensors

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2024-04, Vol.20 (15), p.e2307885-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• For the development of acid‐responsive advanced fluorescent films with a 2D nanostructure, a pyridyl cyanostilbene‐based AIEgen (PCRM) is newly synthesized. The synthesized PCRM exhibits aggregation‐induced emission (AIE) and responds reversibly to acid and base stimuli. To fabricate the nanoporous polymer‐stabilized film, PCRM and 4‐(octyloxy)benzoic acid (8OB) are complexed in a 1:1 ratio through hydrogen bonding. The PCRM‐8OB complex with a smectic mesophase is uniaxially oriented at first and photopolymerized with a crosslinker. By subsequently removing 8OB in an alkaline solution, nanopores are generated in the self‐assembled and polymerized hierarchical 2D nanostructure film. The prepared nanoporous fluorescent films exhibit not only the reversible response to acid and base stimuli but also mechanical and chemical robustness. Since the nanoporous fluorescent films have different sensitivities to trifluoroacetic acid (TFA) depending on the molecular orientation in the film, advanced acid vapor sensors that can display the risk level according to the concentration of TFA are demonstrated. Reactive AIEgens‐based hierarchical nanostructure films with nanopores fabricated by a subsequent process of self‐assembly, polymerization, and etching can open a new door for the development of advanced chemosensors. For the development of advanced chemosensors, a pyridyl cyanostilbene‐based AIEgen is newly synthesized. From the optimized mixture, hierarchical nanostructure films with nanopores are fabricated by a subsequent process of self‐assembly, polymerization, and etching. The nanoporous sensing films have different sensitivities to acid vapors depending on the molecular orientation in the film. Utilizing the developed 2D nanostructure sensing films, various types of chemosensors are demonstrated.