首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Two-color photodetachment study of the A~3Π-X ~3Σ- origin band of C_5H-
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Two-color photodetachment study of the A~3Π-X ~3Σ- origin band of C_5H-

机译:C_5H-的A〜3Π-X〜3Σ-原带的双色光解研究

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摘要

The origin band in the electronic transition to the dipole bound excited state of C_5H(D)- anions was measured using two-color photodetachment spectroscopy. The rotational analysis of the partially resolved contour is consistent with a linear structure of the anion in both the ground X~3Σ- and excited A~3Π electronic states, in contrast with an earlier interpretation. The following spectroscopic constants are inferred for C_5H-: T_(00) = 19248.0(1), B′ = 0.0835(1), B′′ = 0.0826(2), A′_(SO) = -11.96(1), λ_(SS)′ = 1.97(8) λ_(SS)′′ = 0.24(15). Ab initio calculations at the UHF-MP2 level support the conclusion that C_5H- is linear in the ground state. The experimentally determined ground state rotational constant can be used in the search for the millimeter wave spectrum of C _5H-.
机译:使用双色光分离光谱法测量了电子跃迁至C_5H(D)-阴离子的偶极结合激发态的原带。与较早的解释相反,部分分解的轮廓的旋转分析与基态X〜3Σ-和激发的A〜3Π电子态中阴离子的线性结构一致。对于C_5H-推断出以下光谱常数:T_(00)= 19248.0(1),B'= 0.0835(1),B''= 0.0826(2),A'_(SO)= -11.96(1), λ_(SS)'= 1.97(8)λ_(SS)''= 0.24(15)。从头算在UHF-MP2级别的计算支持以下结论:C_5H-在基态下是线性的。实验确定的基态旋转常数可用于搜索C _5H-的毫米波谱。

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