Coverage-Induced Conformational Selectivity
| Autor: | Karina Morgenstern, Konrad Boom, Friederike Stein, Steffen Ernst |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemistry
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Gas phase Organic molecules Crystallography General Energy Microscopy Physical and Theoretical Chemistry 0210 nano-technology Selectivity Conformational isomerism Superstructure (condensed matter) Quantum tunnelling |
| Zdroj: | The Journal of Physical Chemistry C. 121:20254-20258 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b04986 |
| Popis: | Different conformations of organic molecules are often almost isoenergetic, giving rise to their coexistence at finite temperature. In the gas phase, pressure was used to shift the equilibrium toward desired conformers. Here we use lateral pressure, enforced by increased coverage, to change the relative abundance of conformers of astraphloxin, an industrial dye, on Ag(100). We show in a variable temperature scanning tunnelling microscopy study that higher coverages enforce the predominance of one conformer only, leading to a homoconformational superstructure. The necessary conformational changes are possible at temperatures as low as 120 K. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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