Ion-in-Conjugation: Squaraine as an Ultrasensitive Ammonia Sensor Material
Xin Xiao, Xue-Feng Cheng, Xiang Hou, Jing-Hui He*（贺竞辉）, Qing-Feng Xu, Hua Li, Na-Jun Li, Dong-Yun Chen, Jian-Mei Lu*（路建美）
College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, P. R. China
small 2017,13, 1602190
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-CH3 highly sensitive. The symmetric molecular geometry and good crystallinity also contribute to the high performance.
链接：http://onlinelibrary.wiley.com/doi/10.1002/smll.201602190/abstract