title: The Different Sensitive Behaviors of a Hydrogen-Bond Acidic Polymer-Coated SAW Sensor for Chemical Warfare Agents and Their Simulants.
abstract: A linear hydrogen-bond acidic (HBA) linear functionalized polymer (PLF), was deposited onto a bare surface acoustic wave (SAW) device to fabricate a chemical sensor. Real-time responses of the sensor to a series of compounds including sarin (GB), dimethyl methylphosphonate (DMMP), mustard gas (HD), chloroethyl ethyl sulphide (2-CEES), 1,5-dichloropentane (DCP) and some organic solvents were studied. The results show that the sensor is highly sensitive to GB and DMMP, and has low sensitivity to HD and DCP, as expected. However, the sensor possesses an unexpected high sensitivity toward 2-CEES. This good sensing performance can't be solely or mainly attributed to the dipole-dipole interaction since the sensor is not sensitive to some high polarity solvents. We believe the lone pair electrons around the sulphur atom of 2-CEES provide an electron-rich site, which facilitates the formation of hydrogen bonding between PLF and 2-CEES. On the contrary, the electron cloud on the sulphur atom of the HD molecule is offset or depleted by its two neighbouring strong electron-withdrawing groups, hence, hydrogen bonding can hardly be formed.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. yinlong0506@foxmail.com.
authors.forename: Yin
authors.initials: Y
authors.lastname: Long
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. uestcwang@126.com.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. xsdu@uestc.edu.cn.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Du
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. cheng.luhua@foxmail.com.
authors.forename: Luhua
authors.initials: L
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. uestcstuwpl@163.com.
authors.forename: Penglin
authors.initials: P
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China. jiangyd@uestc.edu.cn.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Jiang
mesh_terms: D000143:Acids / Q000737:chemistry*; D000162:Acoustics / Q000295:instrumentation*; D002619:Chemical Warfare Agents / Q000032:analysis*; D003199:Computer Systems; D006860:Hydrogen Bonding; D009151:Mustard Gas; D009943:Organophosphorus Compounds / Q000032:analysis; D011108:Polymers / Q000737:chemistry*; D012524:Sarin / Q000032:analysis; D014835:Volatilization
chemical_list: D000143:Acids; D002619:Chemical Warfare Agents; D009943:Organophosphorus Compounds; D011108:Polymers; C031116:dimethyl methylphosphonate; D012524:Sarin; D009151:Mustard Gas
keywords: SAW; chemical sensor; hydrogen-bond acidic polymer