Slow photoelectron velocity-map imaging spectroscopy of C2N-, C4N-, and C6N-

被引：38
|
作者：
Garand, Etienne [1 ]
Yacovitch, Tara I. [1 ]
Neumark, Daniel M. [1 ,2 ]
机构：
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA
来源：
JOURNAL OF CHEMICAL PHYSICS | 2009年 / 130卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
carbon compounds; electron affinity; electron detachment; excited states; ground states; molecular configurations; molecule-photon collisions; negative ions; photoelectron spectra; spin-orbit interactions; LASER-INDUCED FLUORESCENCE; AB-INITIO; EXCITATION SPECTROSCOPY; ASTRONOMICAL DETECTION; CLUSTER ANIONS; NEGATIVE-IONS; SPECTRUM; TRANSFORM; CARBON; BAND;
D O I：
10.1063/1.3076320
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：
High resolution photoelectron spectra of C2N-, C4N-, and C6N- anions are reported, obtained using slow electron velocity-map imaging. The spectra show well resolved transitions to the X (2)Pi neutral ground state of all three species and to the a (4)Sigma(-) excited state of C2N and C4N. This study yields the adiabatic electron affinity of C2N, C4N, and C6N, the spin-orbit splitting in the X (2)Pi state of each radical, and the term energy of the a (4)Sigma(-) state in C2N and C4N. Relatively little vibrational activity is observed, indicating small geometry changes upon photodetachment. This result, plus the observation of transitions to neutral quartet states, indicates that the C2nN- (n=1-3) anions all have linear (3)Sigma(-) ground states.
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页数：7
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