Brute Force Orientation of Matrix-Isolated Molecules: Reversible Reorientation of Formaldehyde in an Argon Matrix toward Perfect Alignment
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- 作者：Youngwook Park ; Hani Kang and Prof. Heon Kang
- 刊名：Angewandte Chemie International Edition
- 出版年：2017
- 出版时间：January 19, 2017
- 年：2017
- 卷：56
- 期：4
- 页码：1046-1049
- 全文大小：1138K
- ISSN：1521-3773
文摘
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 1×108 V m−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.