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Ion‐in‐Conjugation: Squaraine as an Ultrasensitive Ammonia Sensor Material
Author(s) -
Xiao Xin,
Cheng XueFeng,
Hou Xiang,
He JingHui,
Xu QingFeng,
Li Hua,
Li NaJun,
Chen DongYun,
Lu JianMei
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201602190
Subject(s) - ammonia , crystallinity , ion , computer science , materials science , nanotechnology , combinatorial chemistry , chemistry , organic chemistry , crystallography
An organic thin‐film gas sensor based on squaraine detects ammonia as low as 40 ppb with impressive reversibility and stability. The resonance‐stabilized zwitterionic characteristics offer squaraines high affinity and sensitivity toward electron‐rich analytes without irreversible chemical binding, while the embedded squaric ring makes SA‐CH 3 highly sensitive. The symmetric molecular geometry and good crystallinity also contribute to the high performance.