119Sn Mössbauer spectroscopy of tetrahedral tin (IV) molecular solids: SnH4, SnD4, Sn(CH3)4, SnCl4, SnBr4, SnI4, and related compounds
119Sn Mössbauer spectroscopy of tetrahedral tin (IV) molecular solids: SnH4, SnD4, Sn(CH3)4, SnCl4, SnBr4, SnI4, and related compounds
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四面体锡 (IV) 分子固体的 119Sn 穆斯堡尔谱：SnH4、SnD4、Sn(CH3)4、SnCl4、SnBr4、SnI4 和相关化合物
DOI：
10.1063/1.435186
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发表时间：
1977
影响因子：
4.4
通讯作者：
M. F. Leahy
中科院分区：
文献类型：
--
作者：
R. Herber;M. F. Leahy
为了进一步验证有效振动质量(EVM)模型在穆斯堡尔效应研究中的应用，测定了一些四面体锡(IV)化合物及其相关分子的~(119)Sn无反冲分数与温度的关系。对于许多模型化合物，包括SnCl4、SnBr4、SnI4、(C6H5)4SnCl2和(C6H5)2SnCl2，在高温极限下，lnfa的温度依赖关系是足够线性的，从而允许将(低温)振动光谱晶格模区中的拉曼活动模指定为分子间、分子内相互作用的晶胞振动。在(CH_3)_4Sn、SnH_4、SnD_4和(C_6H_5CH_2)_4Sn的情况下，由于在整个可接近的温度范围内存在明显的运动非谐性，高温下的穆斯堡尔数据不能符合简单的线性温度关系。在此温度范围内，考察了同位素替代对穆斯堡尔超精细参数的影响。
The temperature dependence of the 119Sn recoil‐free fraction has been determined for a number of tetrahedral Sn(IV) compounds and related molecules in order to test further the assumptions of the effective vibrating mass (EVM) model as applied to Mossbauer effect studies. For a number of model compounds, including SnCl4, SnBr4, SnI4, (C6H5)4Sn, and (C6H5)2SnCl2 the temperature dependence of lnfa in the high temperature limit is sufficiently linear to permit an assignment of a Raman active mode in the lattice mode region of the (low temperature) vibrational spectra to an intermolecular, intraunit cell vibration of the molecules against each other. In the case of (CH3)4Sn, SnH4, SnD4, and (C6H5CH2)4Sn, the Mossbauer data in the high temperature limit cannot be fitted to a simple linear temperature dependence due to pronounced motional anharmonicity over the whole accessible temperature range. The effect of isotopic substitution on the Mossbauer hyperfine parameters has been examined over the temperature ran...