期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.178301
关键词
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资金
- Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering Division, U. S. Department of Energy [DE-AC02-05CH11231]
- NSF IGERT
Single-molecule-resolved scanning tunneling microscopy of tetra-tert-butyl azobenzene ( TTB-AB) molecules adsorbed onto Au(111) reveals chirality selection rules in their photoswitching behavior. This observation is enabled by the fact that trans-TTB-AB molecules self-assemble into homochiral domains. Cis-TTB-AB molecules produced via photoisomerization are found in two distinct conformations with final state chirality determined by the initial trans isomer chirality. Based on these observations and ab initio calculations, we propose a new inversion-based dynamical photoswitching mechanism for azobenzene molecules at a surface.
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