Langmuir Films of Anthracene Derivatives on Liquid Mercury II: Asymmetric Molecules
| Autor: | Peter S. Pershan, E. Ofer, B. M. Ocko, L. Tamam, Moshe Deutsch, Eli Sloutskin, H. Kraack |
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| Rok vydání: | 2007 |
| Předmět: |
Langmuir
Anthracene Anthraquinone Anthrone Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Crystallography National Synchrotron Light Source General Energy chemistry X-ray crystallography Molecular symmetry Molecule Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 111:2580-2587 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp063937g |
| Popis: | The 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. |
| Databáze: | OpenAIRE |
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