Rotation of CH3+ Cations in Helium Droplets

被引：15

作者：

Erukala, Swetha ^{[1
]}

Verma, Deepak ^{[1
]}

Vilesov, Andrey ^{[1
,2
]}

机构：

[1] Univ Southern Calif, Dept Chem, Los Angeles, CA 90089 USA

[2] Univ Southern Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2021年 / 12卷 / 21期

基金：

美国国家科学基金会;

关键词：

INFRARED PHOTODISSOCIATION; IR SPECTROSCOPY; BOUND-STATES; IONS; HE; MOLECULES; SOLVATION; CLUSTERS; SPECTRA; MODEL;

D O I：

10.1021/acs.jpclett.1c01274

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Observation of the free rotation of molecules in helium droplets enabled microscopic study of interaction of quantum rotors with a superfluid environment at T = 0.4 K. This work extends studies of rotation in helium to molecular cations, such as methenium, CH3+. The spectrum of the v(3) band of CH3+ around 3130 cm(-1) has three prominent peaks assigned to the rotational structure of the band. While the free CH3+ is an oblate top, in helium it behaves as a prolate top. This effect is ascribed to the strong binding of two He atoms along the figure axis of the ion. Our results indicate that the other He atoms within the first solvation shell remain fluxional and in disparity with the widely accepted model of a rigid He "snowball" surrounding ions.

引用

页码：5105 / 5109

页数：5

共 34 条

[1] [Anonymous], 1956, Molecular spectra and molecular structure. II. Infrared and raman spectra of polyatomic molecules
[2] IONS IN LIQUID HELIUM
ATKINS, KR
[J]. PHYSICAL REVIEW, 1959, 116 (06): : 1339 - 1343
[3] Potential energy surface, bound states, and rotational inelastic cross sections of the He-CH4 system:: A theoretical investigation
Calderoni, G
Cargnoni, F
Martinazzo, R
Raimondi, M
[J]. JOURNAL OF CHEMICAL PHYSICS, 2004, 121 (17) : 8261 - 8270
[4] Superfluid hydrodynamic model for the enhanced moments of inertia of molecules in liquid 4He
Callegari, C
Conjusteau, A
Reinhard, I
Lehmann, KK
Scoles, G
Dalfovo, F
[J]. PHYSICAL REVIEW LETTERS, 1999, 83 (24) : 5058 - 5061
[5] Infrared spectroscopy of helium nanodroplets: novel methods for physics and chemistry
Choi, M. Y.
Douberly, G. E.
Falconer, T. M.
Lewis, W. K.
Lindsay, C. M.
Merritt, J. M.
Stiles, P. L.
Miller, R. E.
[J]. INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 2006, 25 (1-2) : 15 - 75
[6] Bosonic helium droplets with cationic impurities: Onset of electrostriction and snowball effects from quantum calculations
Coccia, E.
Bodo, E.
Marinetti, F.
Gianturco, F. A.
Yildrim, E.
Yurtsever, M.
Yurtsever, E.
[J]. JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (12)
[7] INFRARED-SPECTROSCOPY OF CARBO-IONS .3. UPSILON-3 BAND OF METHYL CATION CH-3+
CROFTON, MW
JAGOD, MF
REHFUSS, BD
KREINER, WA
OKA, T
[J]. JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (02) : 666 - 678
[8] Probing Elusive Cations: Infrared Spectroscopy of Protonated Acetic Acid
Davies, Julia A.
Besley, Nicholas A.
Yang, Shengfu
Ellis, Andrew M.
[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2019, 10 (09): : 2108 - 2112
[9] Spectroscopic and theoretical studies of CH+3-Rgn clusters (Rg = He, Ne, Ar):: from weak intermolecular forces to chemical reaction mechanisms
Dopfer, O
[J]. INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 2003, 22 (03) : 437 - 495
[10] IR spectroscopy of protonated leu-enkephalin and its 18-crown-6 complex embedded in helium droplets
Florez, Ana Isabel Gonzalez
Ahn, Doo-Sik
Gewinner, Sandy
Schoellkopf, Wieland
von Helden, Gert
[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2015, 17 (34) : 21902 - 21911

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