Cation-π-interaction promoted aggregation of aromatic molecules and energy transfer within Y zeolites

K. J. Thomas, R. B. Sunoj, J. Chandrasekhar, V. Ramamurthy

Research output: Contribution to journalArticle

53 Scopus citations

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 π-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 - π-interaction results in stabilization of the π-stacked benzene dimer. Results of MP2 calculations are consistent with the formation of ground-state π-stacked aggregates of naphthalene molecules within Y zeolites.

Original languageEnglish (US)
Pages (from-to)4912-4921
Number of pages10
JournalLangmuir
Volume16
Issue number11
DOIs
StatePublished - May 30 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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