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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Comparative study of infrared and Raman spectra of CCl4 in vapour and condensed phases: Effect of LO-TO splitting resulting from hetero-isotopic TD-TD interactions
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Comparative study of infrared and Raman spectra of CCl4 in vapour and condensed phases: Effect of LO-TO splitting resulting from hetero-isotopic TD-TD interactions

机译：气相和冷凝相中CCl4的红外光谱和拉曼光谱的比较研究：异同位素TD-TD相互作用引起的LO-TO分裂的影响

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摘要

Salient features of an in-depth comparative study of infrared and Raman spectra Of CCl4 in vapour, liquid and condensed phases are presented. Wavenumbers of v(4), v(1) + v(4), v(3) and 2v(3) modes of CCl4 vapour in infrared and Raman spectra are found to be in good agreement. Analysis of the vibrational spectra of liquid CCl4 together with the spectroscopic observations on solid CCl4 at low temperatures reveal TD-TD interaction amongst various CCl4 isotopes in condensed states. The concept of LO-TO splitting of dipole active v(3) and v(1) + v(4) Fermi doublet have been invoked to explain several features of the vibrational spectra of liquid CCl4. There is significant strengthening of Fermi resonance interaction between v(3) and v(1) + v(4) modes Of CCl4 in condensed phases relative to that in vapour phase. The Fermi resonance interaction parameter W has been found to be independent of molecular environment. (c) 2005 Elsevier B.V. All rights reserved.
机译：提出了对蒸气相，液相和冷凝相中CCl4的红外和拉曼光谱进行深入比较研究的显着特征。发现在红外光谱和拉曼光谱中CCl4蒸气的v（4），v（1）+ v（4），v（3）和2v（3）模的波数非常吻合。液体CCl4的振动光谱分析以及在低温下对固体CCl4的光谱观察表明，凝聚态下各种CCl4同位素之间的TD-TD相互作用。偶极子有源v（3）和v（1）+ v（4）费米二重态的LO-TO分裂概念被用来解释液态CCl4振动光谱的几个特征。相对于气相而言，在冷凝相中CCl4的v（3）和v（1）+ v（4）模之间的费米共振相互作用得到了显着增强。已经发现费米共振相互作用参数W与分子环境无关。 （c）2005 Elsevier B.V.保留所有权利。

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