1. Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
2. Institute of Organic Chemistry and Röntgen Research Center for Complex Material Systems, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
3. Department of Chemistry, University of Hull, Cottingham Road, Kingston-upon-Hull, East Yorkshire, HU6 7RX, United Kingdom
4. Department of Chemistry, Youngstown State University, One University Plaza, Youngstown, Ohio 44555-3663, United States