The frequency-domain infrared spectrum of ammonia encodes changes in molecular dynamics caused by a DC electric field
The frequency-domain infrared spectrum of ammonia encodes changes in molecular dynamics caused by a DC electric field
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氨的频域红外光谱编码直流电场引起的分子动力学变化
DOI:
10.1073/pnas.1914432116
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Kang, Heon
中科院分区:
文献类型:
--
作者:
Park, Youngwook;Kang, Hani;Field, Robert W.;Kang, Heon
Ammonia is special. It is nonplanar, yet inv= 1 of the umbrella mode (ν2) its inversion motion is faster thanJ= 0↔1 rotation. Does the simplicity of the Chemist's concept of an electric dipole moment survive the competition between rotation, inversion, and a strong external electric field? NH3is a favorite pedagogical example of tunneling in a symmetric double-minimum potential. Tunneling is a dynamical concept, yet the quantitative characteristics of tunneling are expressed in a static, eigenstate-resolved spectrum. The inverting-umbrella tunneling motion in ammonia is both large amplitude and profoundly affected by an external electric field. We report how a uniquely strong (up to 108V/m) direct current (DC) electric field causes a richly detailed sequence of reversible changes in the frequency-domain infrared spectrum (thev= 0→1 transition in the ν2umbrella mode) of ammonia, freely rotating in a 10 K Ar matrix. Although the spectrum is static, encoded in it is the complete inter- and intramolecular picture of tunneling dynamics.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. Behrens;U. Buck;R. Fröchtenicht;M. Hartmann;F. Huisken;F. Rohmund
通讯作者:
F. Rohmund
影响因子:
4.4
作者:
Sunghwan Shin;Youngsoon Kim;Eui;Du Hyeong Lee;Hani Kang;Heon Kang
通讯作者:
Heon Kang
影响因子:
4.4
作者:
Chengyin Wu;Yonggang He;W. Kong
通讯作者:
W. Kong
影响因子:
2.9
作者:
M. Ruzi;David T. Anderson
通讯作者:
David T. Anderson
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
R. Bemish;M. Chan;Roger E. Miller
通讯作者:
Roger E. Miller