title: A novel colorimetric HSO4(-) sensor in aqueous media.
abstract: A novel and sensitive anion receptor 3, bearing Schiff base structure, nitrophenyl azobenzol and carboxyl groups, was developed and characterized as a single chemosensor for the recognition of HSO(4)(-) anion. The different responses of UV-vis spectra and color changes of 3 could be applied to the recognition for HSO(4)(-) over other anions such as F(-), CI(-), Br(-), I(-), AcO(-), H(2)PO(4)(-) and CIO(4)(-) by the naked eye. Furthermore, the anion binding interaction of receptor-anion was also studied using UV-vis and (1)H NMR titration which revealed that 3 displayed a remarkable binding ability for the HSO(4)(-) with an association constant K(a)=6.59×10(4) M(-1). And the detection limitation of HSO(4)(-) with the receptor 3 was 2.0×10(-6) mol L(-1) in aqueous solution. Most importantly, the qualitative detection of HSO(4)(-) using receptor 3 was attempted with test kit which was made from receptor 3.
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Lanzhou, Gansu, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.forename: You-Ming
authors.initials: YM
authors.lastname: Zhang
authors.forename: Qi
authors.initials: Q
authors.lastname: Lin
authors.forename: Jun-Qiang
authors.initials: JQ
authors.lastname: Li
authors.forename: Tai-Bao
authors.initials: TB
authors.lastname: Wei
mesh_terms: D000838:Anions / Q000737:chemistry*; D015374:Biosensing Techniques; D009682:Magnetic Resonance Spectroscopy; D012545:Schiff Bases / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013431:Sulfates / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D000838:Anions; D012545:Schiff Bases; D013431:Sulfates; D014867:Water