title: Fluorescence lifetime and intensity of terbium-doped dipicolinic acid in water, HCl, and sodium acetate buffer solutions.
abstract: The lifetimes of the individual fluorescing lines from the terbium-doped dipicolinic acid (DPA) complex have been measured and reported, for the first time to our knowledge. These lifetimes have been measured as a function of terbium and dipicolinic acid concentration, solvent pH, and solvent composition for water, HCl, and sodium acetate buffer solutions. Fluorescence lifetimes over the range from 0.75 to 1.07 ms were measured. The maximum fluorescence was obtained for distilled water solutions.
authors.affiliation: Department of Physics, University of South Florida, 4202 East Fowler Avenue, PHY 114, Tampa, Florida 33620, USA.
authors.forename: Anali
authors.initials: A
authors.lastname: Makoui
authors.forename: Dennis K
authors.initials: DK
authors.lastname: Killinger
mesh_terms: D002021:Buffers; D005456:Fluorescent Dyes; D006207:Half-Life; D006851:Hydrochloric Acid / Q000737:chemistry*; D010848:Picolinic Acids / Q000032:analysis* / Q000737:chemistry*; D019346:Sodium Acetate / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013725:Terbium / Q000032:analysis* / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D002021:Buffers; D005456:Fluorescent Dyes; D010848:Picolinic Acids; D014867:Water; D013725:Terbium; D019346:Sodium Acetate; D006851:Hydrochloric Acid; C004860:dipicolinic acid