title: Dansyl - Substituted Aza Crown Ethers: Complexation with Alkali, Alkaline Earth Metal Ions and Ammonium.
abstract: The present study investigates the binding properties of four dansyl substituted aza-crown ethers with alkali, alkaline earth metal ions and ammonium. The influence of the solvent polarity and protonation on the photophysical properties of the compounds was studied by UV/Vis and fluorescence methods. The host species caused only slight changes on the absorption spectra of the ligands. The fluorescence changes were more pronounced and concentration dependent thus allowing to calculate the binding constants of the process. The most stable complex under our working conditions was the one between Ba(2+) and DNS18C6.
authors: Department of Chemistry, Florida A&M University, 444 Gamble St. #204, Tallahassee, FL 32307, USA, Tel: 1-850-412-5662.
authors: Nelly
authors: N
authors: Mateeva
authors: Shihab
authors: S
authors: Deiab
authors: Edikan
authors: E
authors: Archibong
authors: Donka
authors: D
authors: Tasheva
authors: Bereket
authors: B
authors: Mochona
authors: Madhavi
authors: M
authors: Gangapuram
authors: Kinfe
authors: K
authors: Redda