title: Constrained photophysics of partially and fully encapsulated charge transfer probe (E)-3-(4-Methylaminophenyl) acrylic acid methyl ester inside cyclodextrin nano-cavities: evidence of cyclodextrins cavity dependent complex stoichiometry.
abstract: The polarity sensitive intra-molecular charge transfer (ICT) emission from (E)-3-(4-Methylaminophenyl) acrylic acid methyl ester (MAPAME) is found to show distinct changes once introduced into the nano-cavities of cyclodextrins in aqueous environment. Movement of the molecule from the more polar aqueous environment to the less polar, hydrophobic cyclodextrin interior is marked by the blue shift of the CT emission band with simultaneous fluorescence intensity enhancement. The emission spectral changes on complexation with the α- and β-CD show different stoichiometries as observed from the Benesi-Hildebrand plots. Fluorescence anisotropy and lifetime measurements were performed to probe the different behaviors of MAPAME in aqueous α- and β-CD solutions.
authors: Department of Chemistry, University of Calcutta, Kolkata, India.
authors: Shalini
authors: S
authors: Ghosh
authors: Sankar
authors: S
authors: Jana
authors: Nikhil
authors: N
authors: Guchhait
mesh_terms: D000042:Absorption / Q000528:radiation effects; D000179:Acrylates / Q000737:chemistry*; D002138:Calibration; D003505:Cyclodextrins / Q000737:chemistry*; D005454:Fluorescence Polarization; D008027:Light; D008968:Molecular Conformation / Q000528:radiation effects; D049329:Nanostructures / Q000737:chemistry*; D055585:Physical Phenomena; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry
chemical_list: C544132:(E)-3-(4-methylaminophenyl)acrylic acid methyl ester; D000179:Acrylates; D003505:Cyclodextrins; D014867:Water