Absolute infrared intensities and band shapes in pure solid CO and CO in some solid matrices
Absolute infrared intensities and band shapes in pure solid CO and CO in some solid matrices
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纯固体 CO 和某些固体基质中 CO 的绝对红外强度和谱带形状
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
K. G. Brown
中科院分区：
文献类型：
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作者：
G. Jiang;W. Person;K. G. Brown
本文研究了一氧化碳在氩气中的红外吸收光谱。本文测量了纯晶体CO和CO在氩基体中的绝对红外强度。使用二阶矩确定吸收带基线的技术已经过测试，发现可以改善数据。纯固体CO的绝对积分摩尔吸收系数为A=58.1±5.50 km mol-1（1 km/mole=100 cm/mmole），而氩气基质中CO的绝对积分摩尔吸收系数为66.5±2.4 km mol-1。在实验误差范围内，这两个值被认为是相同的。研究还作出了CO捕获在不同的矩阵，包括SF6，C6 H6和四氯化碳。从气相（A=58.0 km mol −1）到纯固相（A=58.1）或到固体基质（66.5−114 km mol−1，取决于基质），CO的绝对强度明显增加，这在很大程度上是由于电场效应。谱带的形状被分析以获得二阶和四阶矩，从而获得分子间力矩和偶极时间相关函数。从一个系统到另一个系统的相关函数随时间的扭矩和缓慢衰减的大值表明，CO分子在纯固体和固体基质中要么极大地阻碍了旋转，要么根本没有旋转。
The infrared absorption spectra of carbon monoxide in argon matrices have been studied over a wide range of CO concentrations. The absolute infrared intensities of pure crystalline CO and of CO in argon matrices have been measured. The technique of using the second moment to determine the baseline of the absorption band has been tested and found to improve the data. The absolute integrated molar absorption coefficient of pure solid CO was found to be A=58.1±5.50 km mol−1 (1 km/mole=100 cm/mmole) and that for CO in the argon matrices is 66.5±2.4 km mol−1. The two values are believed to be the same within experimental error. Studies were also made of CO trapped in different matrices, including SF6, C6H6, and CCl4. The absolute intensity of CO increases from the gas phase (A=58.0 km mole−1) to the pure solid phase (A=58.1) or to the solid matrices (66.5−114 km mol−1, depending on the matrix) apparently due for the most part to the electric field effect. The band shapes have been analyzed to obtain the second and fourth moments and hence the intermolecular torques and dipole time−correlation functions. The large values for the torques and slow decay of the correlation function with time from one system to another suggest that the CO molecules have either greatly hindered rotation or no rotation at all in the pure solid and in the solid matrices.