Gas phase electronic spectrum of T-shaped AlC2 radical

被引：7

作者：

Apetrei, C. ^{[1
]}

Knight, A. E. W. ^{[1
]}

Chasovskikh, E. ^{[1
]}

Jochnowitz, E. B. ^{[1
]}

Ding, H. ^{[1
]}

Maier, J. P. ^{[1
]}

机构：

[1] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland

来源：

JOURNAL OF CHEMICAL PHYSICS | 2009年 / 131卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

ab initio calculations; aluminium compounds; fluorescence; free radicals; molecular beams; molecule-photon collisions; photoionisation; rotational states; two-photon spectra; vibrational states; vibronic states; YTTRIUM DICARBIDE; DISSOCIATION ENERGIES; INFRARED-SPECTRA; AB-INITIO; SPECTROSCOPY; IDENTIFICATION; FREQUENCIES; TRANSITION; MOLECULE; SYSTEM;

D O I：

10.1063/1.3186758

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：

Gas phase electronic transitions for the C approximate to B-2(2)<- X approximate to (2)A(1) and D approximate to B-2(1)<- X approximate to (2)A(1) band systems of T-shaped AlC2 (C-2v) radical have been measured in the 345-475 nm range. Vibrational analyses of both band systems are reported. Simulation of several rotationally resolved bands confirms previously obtained rotational parameters for the C approximate to B-2(2) state. The radical is produced by ablating an aluminum rod in the presence of acetylene gas. The resulting supersonic molecular beam is probed using both mass-selective resonant two-color two-photon ionization and laser induced fluorescence. Ab initio calculations and vertical electronic excitation energies help the assignment. Vibrational frequencies for the X approximate to (2)A(1), C approximate to B-2(2), and D approximate to B-2(1) states have been determined. Rotational analysis of a number of bands yields spectroscopic constants for one vibronic state in the C approximate to B-2(2) manifold and the origin band of the D approximate to B-2(1)<- X approximate to (2)A(1) system.

引用

页数：7

共 36 条

[1] Near-infrared diode-laser spectroscopy of the CCO radical in the (A)over-tilde(010)3Δ-(X)over-tilde(010)3Π(b) band [J].