期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 4, 页码 1046-1049出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201610948
关键词
argon matrix; electric fields; formaldehyde; IR spectroscopy; molecular orientation
资金
- Samsung Science and Technology Foundation [SSTF-BA1301-04]
Brute force orientation by an electric field is a promising way of controlling the orientation of polar molecules in the gas phase, but its application to condensed-phase molecules has been very limited. We studied the reorientation of formaldehyde molecules in a solid Ar matrix under the influence of a strong electric field using reflection absorption infrared spectroscopy. Asymptotically perfect alignment of the formaldehyde molecules along the field was achieved at field strengths exceeding 1 x 10(8) Vm(-1). The vibrational bands of the aligned molecules exhibited a unidirectional Stark shift proportional to the field strength. The reorientation of the molecules was reversible despite the cryogenic solid environment of the system.
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