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Updated: Jun 10, 2026
Activation and Conjugation of Soluble Polysaccharides using 1-Cyano-4-Dimethylaminopyridine Tetrafluoroborate (CDAP)
Published on: June 14, 2021
Fluorimetric and prototropic studies on the inclusion complexation of 3,3'-diaminodiphenylsulphone with
Muthu Vijayan Enoch1, Rajaram Rajamohan, Meenakshisundaram Swaminathan
1Department of Chemistry, Annamalai University, Annamalainagar 608 002, India.
Abstract:
The photophysical and photoprototropic properties of 3,3'-diaminodiphenylsulphone (3DADPS) in aqueous beta-cyclodextrin (beta-CDx) solution have been investigated using absorption and fluorescence spectral techniques. beta-CDx forms 1:1 inclusion complex with 3DADPS as revealed by steady state and time-resolved fluorescence spectroscopy. This inclusion complex formation was also confirmed by the FT-IR and SEM image analysis of solid complex prepared by co-precipitation method. The existence of twisted intramolecular charge transfer state and the unusual red shift observed during inclusion complexation were analyzed and discussed. The ground and excited state acidity constants in beta-CDx are reported. Based on the photophysical and photoprototropic characteristics of 3DADPS in beta-CDx, the structure of the 1:1 inclusion complex is proposed.
