title: Design of switchable wettability sensor for paraquat based on clicking calix[4]arene.
abstract: A calix[4]arene acetylene (C4AE)-modified gold surface is successfully constructed in situ via click chemistry. The functionalized surface is used for selective recognition of paraquat by a wettability switch. Impedance measurements showed that the surface also expresses recognition for paraquat with a high sensitivity of 10 pM. The recognition mode, based on host-guest inclusion, is studied by computational calculations and the possible mechanism is analyzed.
authors.affiliation: Key Laboratory of Pesticide and Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Guifen
authors.initials: G
authors.lastname: Zhang
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Zhu
authors.forename: Fajun
authors.initials: F
authors.lastname: Miao
authors.forename: Demei
authors.initials: D
authors.lastname: Tian
authors.forename: Haibing
authors.initials: H
authors.lastname: Li
mesh_terms: D000114:Acetylene / Q000138:chemical synthesis / Q000737:chemistry; D047250:Calixarenes / Q000138:chemical synthesis / Q000737:chemistry*; D057930:Click Chemistry; D017097:Electric Impedance; D055664:Electrochemical Techniques / Q000379:methods*; D006046:Gold / Q000737:chemistry; D006540:Herbicides / Q000032:analysis*; D010269:Paraquat / Q000032:analysis*; D010636:Phenols / Q000138:chemical synthesis / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013499:Surface Properties; D017155:Wettability
chemical_list: D006540:Herbicides; D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D006046:Gold; D000114:Acetylene; D010269:Paraquat