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This article reports modulation of intramolecular charge transfer (ICT) reaction of 2-methoxy-4-(N,N-dimethylamino)benzaldehyde (2-MDMABA) encapsulated within the cyclodextrin nanocavities investigated by steady state and time resolved measurements. The ICT emission, absent in bulk water, originates in the presence of α-, β- and γ-CD with the huge enhancement of local emission. From the Benesi–Hildebrand plot, the stoichiometry of the host–guest inclusion complex is found to be 1:1 for β- and γ-CD whereas 1:1 and 1:2 guest to host complexation occur at low and high concentration of α-CD, respectively. The association constants of the inclusion complexes have also been estimated from the Benesi–Hildebrand plot. The greater binding capability of 2-MDMABA with β-CD than that of other two CDs is further supplemented by time resolved study.
| Authors: | Anuva Samanta, Sankar Jana, Nikhil Guchhait | |
| Journal: | Journal of Inclusion Phenomena and Macrocyclic Chemistry | |
| Year: | 2012 | |
| DOI: | 10.1007/s10847-012-0146-4 | |
| Publication date: | 13-05-2012 |
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