title: Inclusion complexation and photoprototropic behaviour of 3-amino-5-nitrobenzisothiazole with beta-cyclodextrin.
abstract: The inclusion complexation and photoprototropic behaviour of 3-amino-5-nitrobenzisothiazole (ANBT) in aqueous beta-cyclodextrin (beta-CDx) solution have been investigated. Absorption and fluorescence intensities of the neutral form of ANBT are enhanced due to the formation of 1:1 complex with beta-CDx. The complex formation has been confirmed by IR spectral and SEM studies. In the presence of beta-CDx, no change was observed in the ground and excited state acidity constant values when compared with aqueous medium. Based on its inclusion complexation and photoprototropic characteristics of ANBT in beta-CDx, the structure of the 1:1 complex is proposed.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar 608002, India.
authors.forename: R
authors.initials: R
authors.lastname: Rajamohan
authors.forename: S Kothai
authors.initials: SK
authors.lastname: Nayaki
authors.forename: M
authors.initials: M
authors.lastname: Swaminathan
mesh_terms: D052160:Benzothiazoles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010777:Photochemistry; D013053:Spectrophotometry; D017186:Titrimetry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: C528385:3-amino-5-nitrobenzisothiazole; D052160:Benzothiazoles; D047392:beta-Cyclodextrins