通过远红外-真空紫外双色电离研究中性硅团簇的振动光谱。

Vibrational spectroscopy of neutral silicon clusters via far-IR-VUV two color ionization.

机构信息

Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.

出版信息

J Chem Phys. 2009 Nov 7;131(17):171105. doi: 10.1063/1.3262803.

PMID:19894990

Abstract

Tunable far-infrared-vacuum-ultraviolet two color ionization is used to obtain vibrational spectra of neutral silicon clusters in the gas phase. Upon excitation with tunable infrared light prior to irradiation with UV photons we observe strong enhancements in the mass spectrometric signal of specific cluster sizes. This allowed the recording of the infrared absorption spectra of Si(6), Si(7), and Si(10). Structural assignments were made by comparison with calculated linear absorption spectra from quantum chemical theory.

摘要

可调远红外-真空紫外双色电离用于获得气相中性硅团簇的振动光谱。在用可调红外光激发后再用紫外光子辐照，我们观察到特定团簇尺寸的质谱信号有很强的增强。这使得能够记录 Si(6)、Si(7)和 Si(10)的红外吸收光谱。通过与量子化学理论计算的线性吸收光谱进行比较，进行了结构归属。