Affiliation: | (1) Department of Chemistry, University of North Texas, P. O. Box 305070, Denton, TX 76203-5070, USA;(2) Department of Research and Statistical Support, University of North Texas, P. O. Box 305398, Denton, TX 76203-5398, USA;(3) Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK |