Supramolecular Chemistry of Pyronines B and Y, β-Cyclodextrin and Linked β-Cyclodextrin Dimers

Huy T. Ngo; Philip Clements; Christopher J. Easton; Duc-Truc Pham; Stephen F. Lincoln

doi:10.1071/CH09467

RESEARCH ARTICLE

Previous Next Contents Vol 63(4)

Supramolecular Chemistry of Pyronines B and Y, β-Cyclodextrin and Linked β-Cyclodextrin Dimers

Huy T. Ngo ^A , Philip Clements ^A , Christopher J. Easton ^B , Duc-Truc Pham ^A and Stephen F. Lincoln ^A ^C

+ Author Affiliations

- Author Affiliations

^A School of Chemistry and Physics, University of Adelaide, Adelaide, SA 5005, Australia.

^B Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia.

^C Corresponding author. Email: stephen.lincoln@adelaide.edu.au

Australian Journal of Chemistry 63(4) 687-692 https://doi.org/10.1071/CH09467
Submitted: 2 September 2009 Accepted: 7 January 2010 Published: 8 April 2010

Abstract

The complexation of cationic pyronine B (PB⁺) and pyronine Y (PY⁺) by β-cyclodextrin (βCD) and two linked βCD dimers, N,N′-bis((2^AS,3^AS)-3^A-deoxy-β-cyclodextrin-3^A-yl)succinamide, 33βCD₂suc, and N,N′-bis(6^A-deoxy-β-cyclodextrin-6^A-yl)succinamide, 66βCD₂suc, in aqueous solution has been studied by UV-vis, fluorescence, and ¹H NMR spectroscopy. The complexation constants for the 1:1 complexes: βCD.PB⁺, 33βCD₂suc.PB⁺, 66βCD₂suc.PB⁺, and the analogous PY⁺ complexes are reported as are the dimerization constants for PB⁺ and PY⁺. The modes of complexation, dimerization, and fluorescence quenching are discussed.

Acknowledgement

Support of this study by the Australian Research Council and the University of Adelaide, and the award of an Endeavour Postgraduate Award to H.T.N. are gratefully acknowledged.

References

Supramolecular Chemistry of Pyronines B and Y, β-Cyclodextrin and Linked β-Cyclodextrin Dimers

Abstract

Acknowledgement

Subscriber Login