title: Thiourea based novel chromogenic sensor for selective detection of fluoride and cyanide anions in organic and aqueous media.
abstract: Novel chromogenic thiourea based sensors 4,4'-bis-[3-(4-nitrophenyl) thiourea] diphenyl ether 1 and 4,4'-bis-[3-(4-nitrophenyl) thiourea] diphenyl methane 2 having nitrophenyl group as signaling unit have been synthesized and characterized by spectroscopic techniques and X-ray crystallography. The both sensors show visual detection, UV-vis and NMR spectral changes in presence of fluoride and cyanide anions in organic solvent as well as in aqueous medium. The absorption spectra indicated the formation of complex between host and guest is in 1:2 stoichiometric ratios.
authors.affiliation: Process Technology Development Division, Defence R&D Establishment, Jhansi Road, Gwalior 474002, India.
authors.forename: Vinod
authors.initials: V
authors.lastname: Kumar
authors.forename: M P
authors.initials: MP
authors.lastname: Kaushik
authors.forename: A K
authors.initials: AK
authors.lastname: Srivastava
authors.forename: Ajay
authors.initials: A
authors.lastname: Pratap
authors.forename: V
authors.initials: V
authors.lastname: Thiruvenkatam
authors.forename: T N Guru
authors.initials: TN
authors.lastname: Row
mesh_terms: D000838:Anions / Q000032:analysis; D018360:Crystallography, X-Ray; D003486:Cyanides / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D005459:Fluorides / Q000032:analysis*; D008958:Models, Molecular; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry*; D010647:Phenyl Ethers / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions; D012997:Solvents / Q000737:chemistry; D013890:Thiourea / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: C549178:4,4'-bis-(3-(4-nitrophenyl) thiourea) diphenyl ether; C549180:4,4'-bis-(3-(4-nitrophenyl) thiourea) diphenyl methane; D000838:Anions; D003486:Cyanides; D005456:Fluorescent Dyes; D009930:Organic Chemicals; D010647:Phenyl Ethers; D012996:Solutions; D012997:Solvents; D014867:Water; D013890:Thiourea; D005459:Fluorides