title: Fluorescence properties of Schiff base - N,N'-bis(salicylidene) - 1,2-Phenylenediamine in presence of bile acid host.
abstract: Fluorescence properties of Schiff base - N,N'-bis(salicylidene) - 1,2-phenylenediamine (LH2) is used to study the micelles formed by aggregation of different important bile acids like cholic acid, deoxycholic acid, chenodeoxycholic acid and glycocholic acid by steady state and picosecond time-resolved fluorescence spectroscopy. The fluorescence band intensity was found out to increase with concomitant red shift with gradual addition of different bile acids. Binding constant of the probe with different bile acids as well as critical micelle concentration was obtained from the variation of fluorescence intensity on increasing concentration of bile acids in the medium. The increase in fluorescence quantum yields, fluorescence decay times and substantial decrease in nonradiative decay rate constants in bile acids micellar environment points to the restricted motion of the fluorophore inside the micellar subdomains.
authors.affiliation: Department of Chemistry, Assam University, Silchar, Assam 788 011, India.
authors.forename: Nayan
authors.initials: N
authors.lastname: Roy
authors.affiliation: Department of Chemistry, Assam University, Silchar, Assam 788 011, India.
authors.forename: Pradip C
authors.initials: PC
authors.lastname: Paul
authors.affiliation: Department of Chemistry, Assam University, Silchar, Assam 788 011, India. Electronic address: takhelsingh@gmail.com.
authors.forename: T Sanjoy
authors.initials: TS
authors.lastname: Singh
mesh_terms: D001647:Bile Acids and Salts / Q000737:chemistry*; D002635:Chenodeoxycholic Acid / Q000737:chemistry; D003840:Deoxycholic Acid / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008823:Micelles; D010655:Phenylenediamines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D001647:Bile Acids and Salts; D005456:Fluorescent Dyes; D008823:Micelles; D010655:Phenylenediamines; D003840:Deoxycholic Acid; D002635:Chenodeoxycholic Acid; C034193:1,2-diaminobenzene
keywords: Bile acid; Binding constant; Critical micelle concentration; Fluorescence; Fluorescence lifetime; Schiff base