1. Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
2. Department of Chemistry and Biochemistry, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8262, USA
3. Center for Integrative Petroleum Research (CIPR), College of Petroleum Engineering and Geoscience, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia