1. Department of Chemistry, Queensland Institute of Technology, P.O. Box 246, Brisbane, Qld, 400, Australia
2. School of Textile Technology, University of New South Wales, P.O. Box I, Kensington, 2033, N.S.W. Australia
3. School of Chemistry, University of New South Wales, P.O. Box 1, Kensington, 2033, N.S.W. Australia