Vibrational Relaxation in LiNO3-LiClO4, Na2CO3-Na2SO4, and KNO3-KNO2 Solid Binary Systems

被引：0
作者：
Aliev, A. R. [1 ]
Akhmedov, I. R. [1 ,2 ]
Kakagasanov, M. G. [1 ,2 ]
Aliev, Z. A. [1 ]
Gafurov, M. M. [1 ,2 ]
Rabadanov, K. Sh. [2 ]
Amirov, A. M. [2 ]
机构：
[1] Russian Acad Sci, Amirkhanov Inst Phys, Dagestan Sci Ctr, Makhachkala 367015, Russia
[2] Russian Acad Sci, Analyt Multiaccess Ctr, Dagestan Sci Ctr, Makhachkala, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2018年 / 12卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
binary systems; Raman scattering; molecular spectroscopy; vibrational relaxation; COUPLED PHASE-DIAGRAM; THERMODYNAMIC ANALYSIS; SPECTRA; LITHIUM; PERCHLORATE; SODIUM;
D O I：
10.1134/S1990793118030211
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Molecular relaxation in solid binary systems LiNO3-LiClO4, Na2CO3-Na2SO4, and KNO3-KNO2 was studied by Raman spectroscopy. The relaxation time of the nu(1)(A) vibrations of the anion (NO (3) (-) , CO (3) (2-) ) in the binary system was found to be smaller than in the individual crystal (nitrate or carbonate). The increase in the relaxation rate was explained by the presence of an additional relaxation mechanism of the vibrationally excited states of the anion in the binary system. This mechanism is associated with excitation of vibrations of another anion (ClO (4) (-) , SO (4) (2-) , NO (2) (-) ) and generation of a lattice phonon. It was found that this relaxation mechanism takes place if the frequency difference of these vibrations corresponds to the region of sufficiently high density of states of the phonon spectrum.
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页码：357 / 362
页数：6
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