title: Fluorescent sensing of anions with acridinedione based neutral PET chemosensor.
abstract: Newly synthesised fluorescent chemosensor ADDTU contains the thiourea receptor connected to the acridinedione (ADD) fluorophore via a covalent bond, giving rise to a fluorophore-receptor motif. In this fluorescent chemosensor, the anion recognition takes place at the receptor site which result in the concomitant changes in the photophysical properties of a ADD fluorophore by modulation of photoinduced electron transfer (PET) process. The binding ability of these sensor with the anions F(-), Cl(-), Br(-), I(-), HSO(4)(-), ClO(4)(-), AcO(-), H(2)PO(4)(-) and BF(4)(-) (as their tetrabutylammounium salts) in acetonitrile were investigated using UV-vis, steady state and time-resolved emission techniques. ADDTU system allows for the selective fluorescent sensing of AcO(-), H(2)PO(4)(-) and F(-) over other anions in acetonitrile.
authors.affiliation: National Centre for Ultrafast Processes, University of Madras, Taramani Campus, Chennai 600113, India.
authors.forename: Viruthachalam
authors.initials: V
authors.lastname: Thiagarajan
authors.forename: Perumal
authors.initials: P
authors.lastname: Ramamurthy
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D000166:Acridines / Q000737:chemistry*; D000838:Anions / Q000737:chemistry; D001665:Binding Sites; D015374:Biosensing Techniques / Q000379:methods*; D004579:Electron Transport; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010777:Photochemistry; D012997:Solvents / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013890:Thiourea / Q000737:chemistry; D013997:Time Factors; D017186:Titrimetry
chemical_list: D000097:Acetonitriles; D000166:Acridines; D000838:Anions; D005456:Fluorescent Dyes; D012997:Solvents; D013890:Thiourea; C032159:acetonitrile