| Autor: |
Cho, Jongweon, Berbil-Bautista, L., Levy, Niv, Poulsen, Daniel, Fréchet, Jean M. J., Crommie, Michael F. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 12/21/2010, Vol. 133 Issue 23, p234707, 4p, 5 Diagrams |
| Abstrakt: |
We have used scanning tunneling microscopy to investigate the structure and photoswitching behavior of azobenzene molecules functionalized with bulky spacer groups and adsorbed onto Au(111). We find that positioning tert-butyl 'legs' in a canted arrangement on the azobenzene phenyl rings quenches photoisomerizability of the molecule on Au(111). Addition of cyano groups at the para positions changes the molecular self-assembly significantly, but does not alter the quenched photoisomerizability. This behavior likely arises from a combination of molecule-surface interactions, molecule-molecule interactions, and alteration of azobenzene electronic structure resulting from the position-specific addition of tert-butyl groups. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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