1. Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
2. Arkema Inc., 900 First Avenue, King of
Prussia, Pennsylvania 19406, United States
3. DuPont Experimental Station, Wilmington, Delaware 19898, United States
4. The Makineni Theoretical
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States