title: A simple colorimetric and ON-OFF fluorescent chemosensor for biologically important anions based on amide moieties.
abstract: A simple colorimetric and fluorescent anion chemosensor based on amide moieties, 6-nitro-1,4-dihydroquinoxaline-2,3-dione has been designed, synthesized and characterized by (1)H NMR, ESI-MS and elemental analyses. The strong basic anions such as F(-) and AcO(-) resulted in significant decrease in fluorescent emission intensity of the compound 1, accompanied synchronously with a dramatic color change from colorless to deep yellow in organic medium. (1)H NMR titration experiments shed light on the nature of the interactions between 1 and the anions.
authors.affiliation: Department of Chemistry, Nankai University, Tianjin 300071, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Shao
authors.forename: Hai
authors.initials: H
authors.lastname: Lin
authors.forename: Zun-Sheng
authors.initials: ZS
authors.lastname: Cai
authors.forename: Huakuan
authors.initials: H
authors.lastname: Lin
mesh_terms: D000085:Acetates / Q000737:chemistry; D000577:Amides / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects; D000838:Anions / Q000737:chemistry*; D015374:Biosensing Techniques / Q000379:methods*; D003124:Colorimetry; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects; D005459:Fluorides / Q000737:chemistry; D011810:Quinoxalines / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects; D013056:Spectrophotometry, Ultraviolet
chemical_list: C542013:6-nitro-1,4-dihydroquinoxaline-2,3-dione; D000085:Acetates; D000577:Amides; D000838:Anions; D005456:Fluorescent Dyes; D011810:Quinoxalines; D005459:Fluorides