1. Laboratoire des Fluides Complexes, UMR 5150 TOTAL-CNRS-UPPA, BP 1155, 64013 Pau Cedex, France, State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China, TOTAL S.A., CSTJF, Avenue Larribau, 64018 Pau Cedex, France, and Laboratoire de Chimie Théorique et Physico-Chimie Moléculaire, UMR CNRS 5624, University of Pau, BP 1155, 64013 Pau Cedex, France