title: An abiotic receptor and its Cu(II) complex as selective 'turn-off' chemosensor for bisulfate ion.
abstract: The ligand 2,6-bis[(N-phenyl)amido]-4-methylphenol (receptor 1) and its copper(II) complex (receptor 2) having amide moiety have been designed and synthesized for selective sensing of anions. The anion recognition behavior of the receptor 1 and its copper complex (receptor 2) has been studied in acetonitrile. Quenching of fluorescence was observed for both receptors in presence of HSO4(-) anion whereas other physiologically and environmentally important anions such as F(-), Cl(-), Br(-), I(-), CN(-), OAc(-), HCO₃(-), H₂PO₄(-), NO₃(-), NO₂(-) and SO₄(2-) show fluorescence enhancement behavior. The sensing protocol has been studied both spectrophotometrically as well as spectrofluorometrically. Fluorescence quenching is suggested to proceed via both dynamic and static processes.
authors.affiliation: Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, West Bengal, India.
authors.forename: Suvendu
authors.initials: S
authors.lastname: Samanta
authors.affiliation: Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, West Bengal, India.
authors.forename: Partha Kumar
authors.initials: PK
authors.lastname: Samanta
authors.affiliation: Department of Chemistry, Budge Budge Institute of Technology, Nischintapur, Budge Budge, Kolkata 700 137, India. Electronic address: supriyo78@rediffmail.com.
authors.forename: Supriya
authors.initials: S
authors.lastname: Dutta
authors.affiliation: Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, West Bengal, India. Electronic address: papubiswas_besus@yahoo.com.
authors.forename: Papu
authors.initials: P
authors.lastname: Biswas
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D008024:Ligands; D010636:Phenols / Q000737:chemistry; D062165:Receptors, Artificial / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D013431:Sulfates / Q000032:analysis*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D010636:Phenols; D062165:Receptors, Artificial; D013431:Sulfates; D003300:Copper
keywords: Amide based ligand; Bisulfate anion; Copper(II) complex; ‘Turn-off’ chemosensor