Steady state fluorescence studies of the complexes between pyrene and per-6-O-tert-butyldimethylsilyl α-, β- and γ-cyclodextrins

Mohamed Eddaoudi, Anthony W. Coleman*, Patrice Prognon, Purificacion Lopez-Mahia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The complexation of pyrene by α-, β- and γ-cyclodextrins (CDs), persubstituted at the 6 position by tert-butyldimethylsilyl groups, has been investigated using steady state fluorescence spectroscopy. The α-CD derivative does not, as would be expected from steric considerations, form complexes. The β- and γ-CD derivatives form 1:1 host-guest complexes which show high association constants in 90:10 H2O-DMF solution [i.e. β-CD(SiR)7, 4.85 × 105 M-1; γ-CD(SiR)8, 4.91 × 105 M-1]. Analysis of the polarity of the microenvironment by means of the I/III peak ratios shows a more polar cavity in the case of γ-CD(SiR)8. The concentration dependence of I/III suggests that a weak supramolecular complex γ-CD(SiR)8-pyrene-n·DMF, may exist.

Original languageEnglish (US)
Pages (from-to)955-959
Number of pages5
JournalJournal of the Chemical Society. Perkin Transactions 2
Volume5
DOIs
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Chemistry(all)

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