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首页> 外文期刊>The Journal of Chemical Physics >Infrared and Raman studies on high pressure phases of solid N-2: An intermediate structural modification between epsilon and delta phases
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Infrared and Raman studies on high pressure phases of solid N-2: An intermediate structural modification between epsilon and delta phases

机译：固体N-2高压相的红外和拉曼研究：ε相和δ相之间的中间结构修饰

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The vibrational properties of high pressure phases of solid nitrogen have been studied along several isobars between 30 and 300 K by infrared and Raman spectroscopy. The existence of an intermediate phase (delta(loc)) between the high temperature delta and the low temperature epsilon phases has been confirmed. The analysis of the infrared spectrum in the fundamental region, combined to the knowledge of the Raman spectrum both in the fundamental and in the lattice region, furnishes direct information on the structural properties of the delta(loc) phase. In the delta(loc) phase the disklike molecules are ordered in fixed positions while the spherelike units behave as hindered rotors. An insight on the localization dynamics of the nitrogen molecules is given. A different structure from that of the delta phase is obtained from a group theoretical analysis of the observed Raman and infrared components. As to the epsilon phase, a temperature dependent reorganization of the molecules located on the faces of the rhombohedral cell is suggested. (C) 1998 American Institute of Physics. [References: 37]
机译：固体氮高压相的振动特性已通过红外和拉曼光谱法沿着30至300 K的几个等压线进行了研究。已经确认在高温δ和低温ε相之间存在中间相（delta（loc））。对基本区域中的红外光谱的分析与基本和晶格区域中的拉曼光谱的知识相结合，可提供有关δ（loc）相结构特性的直接信息。在δ（loc）相中，盘状分子在固定位置排列，而球形单元的行为受阻。给出了氮分子定位动力学的见解。通过对观察到的拉曼和红外成分进行的一组理论分析，获得了与δ相不同的结构。关于ε相，提出了位于菱形体表面上的分子的温度依赖性重组。 （C）1998美国物理研究所。 [参考：37]

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