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