title: Colorimeric and fluorescence ON-OFF probe for acetate anion based on thiourea derivative: theory and experiment.
abstract: Based on thiourea moiety, three colorimetric and fluorescent anion probes have been synthesized. Results indicated the probe 1 containing p-NO(2) group showed the strongest binding ability for AcO(-) among the anions tested (F(-), AcO(-), H(2)PO(4)(-), Cl(-), Br(-), I(-)), which was not influenced by the existence of other anions. The interaction of host-guest was accompanied with a dramatic color change from colorless to orange. However, the addition of various anions did not cause noticeable spectral response of the probes (2 and 3) containing o, m-NO(2) groups. Theoretical investigation demonstrated the electron transition of the highest LUMO aroused the red-shift phenomenon in UV-vis spectra of 1-anion.
authors.affiliation: Department of Chemistry, Xinxiang Medical University, Jinsui Road 601, Xinxiang, Henan 453003, China. xuefangshang@126.com
authors.forename: Xuefang
authors.initials: X
authors.lastname: Shang
authors.forename: Shuanbao
authors.initials: S
authors.lastname: Tian
authors.forename: Nankai
authors.initials: N
authors.lastname: Xi
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.forename: Dong
authors.initials: D
authors.lastname: Liang
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhenya
authors.initials: Z
authors.lastname: Yin
authors.forename: Jinlian
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiufang
authors.initials: X
authors.lastname: Xu
mesh_terms: D000085:Acetates / Q000032:analysis*; D000838:Anions / Q000032:analysis*; D003124:Colorimetry / Q000379:methods; D004396:Coloring Agents / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D008958:Models, Molecular; D013056:Spectrophotometry, Ultraviolet; D013890:Thiourea / Q000737:chemistry*
chemical_list: D000085:Acetates; D000838:Anions; D004396:Coloring Agents; D005456:Fluorescent Dyes; D013890:Thiourea