CAJ | 학술논문

费米共振现象广泛存在于分子的振动光谱中，如红外光谱、拉曼光谱等。变换浓度方法是光谱分析的一种主要手段。文章中测量了二硫化碳（CS2）在四氢呋喃（THF）中不同浓度下的拉曼光谱，引入Bertran理论分析研究ν1-2ν2费米共振现象随浓度的变化规律。研究表明，随着二硫化碳体积浓度的降低，溶液中的费米共振特性参数（如光谱强度比、频率间隔、耦合系数、非谐力常数）将随溶剂效应的影响发生明显的变化。例如，光谱强度比逐渐减小，耦合系数逐渐增加等。这些变化不仅受到溶液散射系数的影响，更重要的是弱氢键的形成对振动光谱的影响。光谱图中还出现了拉曼谱线的非对称移动，基频ν1基本没有发生频移，倍频2ν2却逐渐向高波数方向移动，这与理论上的对称移动不相符。通过对分子间微观作用的研究，弱氢键的作用机理可以很好的解释这种现象。这些分析对于进一步研究溶剂效应对费米共振的影响意义重大，对于溶液中的分子振动光谱研究更加具有参考价值。
비미공진현상엄범존재우분자적진동광보중，여홍외광보、랍만광보등。변환농도방법시광보분석적일충주요수단。문장중측량료이류화탄（CS2）재사경부남（THF）중불동농도하적랍만광보，인입Bertran이론분석연구ν1-2ν2비미공진현상수농도적변화규률。연구표명，수착이류화탄체적농도적강저，용액중적비미공진특성삼수（여광보강도비、빈솔간격、우합계수、비해력상수）장수용제효응적영향발생명현적변화。례여，광보강도비축점감소，우합계수축점증가등。저사변화불부수도용액산사계수적영향，경중요적시약경건적형성대진동광보적영향。광보도중환출현료랍만보선적비대칭이동，기빈ν1기본몰유발생빈이，배빈2ν2각축점향고파수방향이동，저여이론상적대칭이동불상부。통과대분자간미관작용적연구，약경건적작용궤리가이흔호적해석저충현상。저사분석대우진일보연구용제효응대비미공진적영향의의중대，대우용액중적분자진동광보연구경가구유삼고개치。
In the present paper ,an innovative experiment was done .The authors measured the Raman spectra of CS2 mixed with THF at different volume fractions .According to the J .F .Bertran theory ,we analyzed the changing regularity of ν1 -2ν2 Fermi resonance along with the different concentration .It was shown that the characteristic parameters of Fermi resonance in solution , such as spectra intensity ,frequency space ,coupling coefficient and anharmonic constant ,will make changes along with solution concentration variation .Because of the existing of solvent effects ,the spectra intensity decreases gradually ,and the coupling co-efficient increases gradually .The explanation of such changes is that the vibration spectra are affected not only by scattering co-efficient ,but also by more weak hydrogen bond's formation .In addition ,the asymmetric frequency shift of the Raman spectra was also found in the paper .The fundamental frequency ν1 basically has no shifts ,but the overtone frequency 2ν2 moves towards the high wave number gradually ,which is inconsistent with the theory of symmetrical movement .According to the study of mo-lecular microcosmic action ,the formation and mechanism of the weak hydrogen bond can preferably explain the above phenome-non .The research has a major influence on the further study of solvent effects in Fermi resonance .And the paper will also pro-vide certain reference value for the study of molecule vibration spectra in solution .