Diode-laser absorption spectroscopy of supersonic carbon cluster beams: the nu 3 spectrum of C5.
Diode-laser absorption spectroscopy of supersonic carbon cluster beams: the nu 3 spectrum of C5.
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超音速碳团簇束的二极管激光吸收光谱：C5 的 nu 3 光谱。
DOI：
10.1126/science.11539817
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发表时间：
1989
期刊：
影响因子：
56.9
通讯作者：
R. Saykally
中科院分区：
文献类型：
--
作者：
J. Heath;A. Cooksy;M. Gruebele;C. Schmuttenmaer;R. Saykally
开发了一种新的光谱实验，其中通过直接吸收二极管激光光谱测量了由石墨激光汽化产生的超音速冷却碳簇的振动跃迁。已使用多普勒有限分辨率测量了 C5 碳簇 nu 3 带的 36 条连续振动线。吸收光谱是具有对称中心的线性分子的特征。光谱的最小二乘分析表明有效碳-碳键长度为 1.283 埃，与从头算量子化学计算非常一致。这项工作证实了随附论文中报告的 IRC + 10216 中 C5 的检测。
A new spectroscopic experiment has been developed in which rovibrational transitions of supersonically cooled carbon clusters, which were produced by laser vaporization of graphite, have been measured by direct-absorption diode-laser spectroscopy. Thirty-six sequential rovibrational lines of the nu 3 band of the C5 carbon cluster have been measured with Doppler-limited resolution. The absorption spectrum is characteristic of a linear molecule with a center of symmetry. Least-squares analysis of the spectrum indicates an effective carbon-carbon bond length of 1.283 angstroms, in good agreement with ab initio quantum chemical calculations. This work confirms the detection of C5 in IRC + 10216 reported in the accompanying paper.