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Raman spectra of biphenyl have been obtained under pressures up to 15 GPa. The results indicated that with the increase of pressure, the effect of inter- and intra-molecular π-πconjugation and delocation increases, accompanied by the intensity enhancement of the Raman bands, and blue shift of the frequency. The intensity ratio (Rf/a) of two Fermi resonance bands υ'6 + υ' 1 and υ' 8 decreases, and the frequency difference Δ increases with the pressure. The Fermi resonance phenomenon disappears when the pressure goos up to 8 GPa. Using J.F. Bertran's theory, we obtained the relationship of the inherent frequency difference Δ0 and coupling coefficient ω with pressure. This phenomenon was explained by high-pressure phase transition. The mechanism of high pressure induced Fermi resonance weakening was also discussed.
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Keywords:
- biphenyl /
- Fermi resonance /
- high pressure /
- Raman spectroscopy
[1] Meng Q T, Zheng Y J, Ding S L 2000 Int. J Quantum Chem. 81 154
[2] Cardini G 1987 Chem. Phys. 117 341
[3] Gao X L, Butler L S, Cremer R, Fan X J 1998 Acta Laser Biology Sinica 7 22(in Chinese)[高小玲、 巴特勒 LS、 克莱默 R、范贤俊1998 激光生物学报 7 22]
[4] Cao B, Zuo J, Li Z W, Ouyang S L, Gao S Q, Lu G H, Jiang Y H 2009 Acta Phys. Sin. 58 3538(in Chinese) [曹 彪、 左 剑、 里佐威、 欧阳顺利、 高淑琴、 陆国会、 姜永恒 2009 物理 学报 58 3538] [5] Chen Y, Zhou Y Q, Ni P 2006 Rock and Mineral Analysis 25 211(in Chinese)[陈 勇、 周瑶琪、 倪 培 2006 岩矿测试 25 211]
[5] Gross M , Muller D C, Nothofer H G, Scherf U, Neher D, Brauchle G, Meerholz K 2000 Nature 405 661
[6] Schon J H, Kloc C, Dodabalapur A, Batlogg B 2000 Science 289 599
[7] Heimel G, Somitsch D, Knoll P, Zojer E 2002 J. Chem. Phys. 116 10921
[8] Zhou M, Zhang P, Liu T C, Xu D P, Jiang Y H, Gao S Q, Li Z W 2010 Acta Phys. Sin. 59 210 (in Chinese) [周 密、 张 鹏、 刘铁成、 许大鹏、 姜永恒、 高淑琴、 里佐威 2010 59 210]
[9] Almenningen A, Bastiansen O, Fernholt L, Cyvin B, Samdal S 1985 J. Mol. Struct 128 59
[10] Roberts R M G 1985 Magn. Reson. Chem. 23 52
[11] Eaton V J, Steele D 1973 J. Chem. Soc., Faraday Trans. 69 1601
[12] Wilson E B 1934 J. Phys. Rev. 46 146
[13] Sandroni S, Geiss F 1966 Spectrochim. Acta Part A 22 235
[14] Bree A, Pang C Y, Rabeneck L 1971 Spectrochim. Acta Part A 27 1293
[15] Takahashi C, Maeda S 1974 Chem. Phys. Lett. 24 584
[16] Bree A, Zwarich R, Taliani C 1982 Chem. Phys. 70 257
[17] Rumi M, Zerbi G 1999 Chem. Phys. 242 123
[18] Charbonneau G P, Delugard Y 1977 Acta Cryst. 33 1586
[19] Murugan N A, Jha P C, Yashonath S, Ramasesha S 2004 J. Phys. Chem. B 108 4178
[20] Bertran J F, Ballester L 1968 Spectrochim. Acta 24 A 1765
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[1] Meng Q T, Zheng Y J, Ding S L 2000 Int. J Quantum Chem. 81 154
[2] Cardini G 1987 Chem. Phys. 117 341
[3] Gao X L, Butler L S, Cremer R, Fan X J 1998 Acta Laser Biology Sinica 7 22(in Chinese)[高小玲、 巴特勒 LS、 克莱默 R、范贤俊1998 激光生物学报 7 22]
[4] Cao B, Zuo J, Li Z W, Ouyang S L, Gao S Q, Lu G H, Jiang Y H 2009 Acta Phys. Sin. 58 3538(in Chinese) [曹 彪、 左 剑、 里佐威、 欧阳顺利、 高淑琴、 陆国会、 姜永恒 2009 物理 学报 58 3538] [5] Chen Y, Zhou Y Q, Ni P 2006 Rock and Mineral Analysis 25 211(in Chinese)[陈 勇、 周瑶琪、 倪 培 2006 岩矿测试 25 211]
[5] Gross M , Muller D C, Nothofer H G, Scherf U, Neher D, Brauchle G, Meerholz K 2000 Nature 405 661
[6] Schon J H, Kloc C, Dodabalapur A, Batlogg B 2000 Science 289 599
[7] Heimel G, Somitsch D, Knoll P, Zojer E 2002 J. Chem. Phys. 116 10921
[8] Zhou M, Zhang P, Liu T C, Xu D P, Jiang Y H, Gao S Q, Li Z W 2010 Acta Phys. Sin. 59 210 (in Chinese) [周 密、 张 鹏、 刘铁成、 许大鹏、 姜永恒、 高淑琴、 里佐威 2010 59 210]
[9] Almenningen A, Bastiansen O, Fernholt L, Cyvin B, Samdal S 1985 J. Mol. Struct 128 59
[10] Roberts R M G 1985 Magn. Reson. Chem. 23 52
[11] Eaton V J, Steele D 1973 J. Chem. Soc., Faraday Trans. 69 1601
[12] Wilson E B 1934 J. Phys. Rev. 46 146
[13] Sandroni S, Geiss F 1966 Spectrochim. Acta Part A 22 235
[14] Bree A, Pang C Y, Rabeneck L 1971 Spectrochim. Acta Part A 27 1293
[15] Takahashi C, Maeda S 1974 Chem. Phys. Lett. 24 584
[16] Bree A, Zwarich R, Taliani C 1982 Chem. Phys. 70 257
[17] Rumi M, Zerbi G 1999 Chem. Phys. 242 123
[18] Charbonneau G P, Delugard Y 1977 Acta Cryst. 33 1586
[19] Murugan N A, Jha P C, Yashonath S, Ramasesha S 2004 J. Phys. Chem. B 108 4178
[20] Bertran J F, Ballester L 1968 Spectrochim. Acta 24 A 1765
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