Tamam, L.Kraack, H.Sloutskin, E.Ocko, B. M.Pershan, PeterOfer, E.Deutsch, M.2011-02-162007Tamam, L., H. Kraack, E. Slotskin, B. M. Ocko, Peter S. Pershan, E. Ofer, and M. Deutsch. 2007. Langmuir films of anthracene derivatives on liquid mercury II: Asymmetric molecules. Journal of Physical Chemistry C 111(6): 2580-2587.1932-7447http://nrs.harvard.edu/urn-3:HUL.InstRepos:4726296The structure and phase sequence of liquid-mercury-supported Langmuir films (LFs) of anthrone and anthralin were studied by surface tensiometry and surface-specific synchrotron X-ray diffraction. In the low-coverage phase the molecules are both side-lying, rather than the flat-lying orientation found for anthracene and anthraquinone. In the high-coverage phase, the molecules are either standing up (anthrone) or remain side-lying (anthralin) on the mercury surface. In contrast with the symmetric anthracene and anthraquinone, both high-coverage phases exhibit long-range in-plane order. The order is different for the two compounds. The structural details, the role of molecular symmetry, the oxygen side groups, and the asymmetry-induced dipole moments are discussed.en-USJournal Article10.1021/jp063937g