Cation-\pi-Interaction Promoted Aggregation of Aromatic Molecules and Energy Transfer within Y Zeolites

Thomas, KJ and Sunoj, RB and Chandrasekhar, J and Ramamurthy, V (2000) Cation-\pi-Interaction Promoted Aggregation of Aromatic Molecules and Energy Transfer within Y Zeolites. In: Langmuir, 16 (11). pp. 4912-4921.

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Abstract

Photophysical studies of naphthalene confirm that aromatic molecules tend to aggregate within cation exchanged Y zeolites. Ground-state aggregation is traced to the presence of cation-aromatic pi-interaction. Solvents that can coordinate to the cation “turn off” the cation-aromatic interaction, and consequently aggregation does not occur in zeolites that are impregnated with the above solvents. The solvent that exhibits a maximum in such an effect is water. MP2 calculations on cation-benzene dimer indicate that cation-\pi-interaction results in stabilization of the \pi-stacked benzene dimer. Results of MP2 calculations are consistent with the formation of ground-state \pi-stacked aggregates of naphthalene molecules within Y zeolites.

Item Type:	Journal Article
Publication:	Langmuir
Publisher:	American Chemical Society
Additional Information:	Copyright of the article belongs to American Chemical Society
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	15 Dec 2008 11:23
Last Modified:	19 Sep 2010 04:53
URI:	http://eprints.iisc.ac.in/id/eprint/16634

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