外场对π电子能隙调制C==C，C—C伸缩振动的影响

doi:10.3964/j.issn.1000-0593(2018)08-2462-06

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摘要：共振拉曼光谱是研究线性多烯分子的主要分子光谱技术。该技术完美地表征了π电子能隙对C==C，C—C伸缩振动的调制规律。这种调制是通过电子-声子耦合完成的。改变外界环境，能隙调制作用将受到影响。测量了溶剂中β-胡萝卜素分子在温度、压力、溶剂效应、相变等不同环境影响下的吸收光谱、共振拉曼光谱，研究了不同外场对π电子能隙调制C==C，C—C伸缩振动的影响机理及规律。结果表明，在外场影响下，体系的能量降低，π电子能隙(π—π^*)减小会使调制增强。即电子-声子耦合增强，使拉曼强度增加，谱线红移。对理解共振拉曼物理过程，认识线性多烯分子的结构，性能有重要意义，对研制优质光电器件也有参考价值。

关键词：线性多烯分子；电子能隙；共振拉曼光谱；电子-声子耦合

Abstract：As an important technique to study the linear polyene molecules, Resonance Raman spectroscopy perfectly characterizes the CC vibrations modulated by the π-electron band gap. This modulation generated by electron-phonon coupling is significantly influenced by external fields. In this paper, we illustrate the dependence of CC vibration modulated by π-electron in different environments such as temperature, pressure, phase and solvent. The results show that the decrease of system energy and the narrowing of π-electron band gap lead to enhancements of the vibrational modulation. Thus, there are enhances of electron-phonon coupling as well as Raman intensity, result of which the spectra red shift. This research is of great significance for a better interpretation on the structural dependence of linear polyene's spectral properties and physical process of its resonance Raman scattering. The results also serve as an important reference for developing high quality photoelectric devices.

Key words：Linear polyene; Electron band gap; Electron-phonon coupling constant; Resonance Raman spectra

收稿日期: 2017-06-30 修订日期: 2017-10-31

中图分类号:

O433.5

基金资助: 国家自然科学基金项目(11374123)资助

通讯作者: 陈伟，付浩阳 E-mail: fuhy16@mails.jlu.edu.cn；chenweidrl1999@163.com

作者简介: 龚楠，1992年生，吉林大学物理学院硕士研究生 e-mail:gongnan15@mails.jlu.edu.cn

引用本文:

龚楠，曹献文，孙成林，房文汇，苑举辉，高淑琴，里佐威，陈伟，付浩阳. 外场对π电子能隙调制C==C，C—C伸缩振动的影响[J]. 光谱学与光谱分析, 2018, 38(08): 2462-2467.
GONG Nan, CAO Xian-wen, SUN Cheng-lin, FANG Wen-hui, YUAN Ju-hui, GAO Shu-qin, LI Zuo-wei, CHEN Wei, FU Hao-yang. Effects of External Fields on CC Atomic Vibrations Modulated by Electron Band Gap. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(08): 2462-2467.

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[1] Qu G N, Li S, Sun C L，et al. Chin. Phys. B, 2012, 21(12): 127802.
[2] Qu G N, Sun M J, Li Shuo, et al. Spectrochim. Acta Part A，2013, 104：92.
[3] Liu T Y, Xu S N, Li Z W, et al. Spectrochim. Acta Part A，2014, 131：153.
[4] Frank H A, Cogdell R. J. Photochem. Photobiol.，1996, 63(3)：257.
[5] Fang W H, Men Z W, Sun C L. Chin. Phys. B, 2010, 19(6): 064213.
[6] Li T, Li F, Li Z, et al. Opt. Lett.，2016, 41(6): 1297.
[7] Wang S, Fang W, Li T, et al. Opt. Exp.，2016, 24(9): 10132.
[8] Baleviius Jr V, Abramavicius D, Polívka T, et al. J. Phys. Chem. Lett.，2016, 7(17): 3347.
[9] Li T, Zhang Y, Gong N, et al. Int. J. Mol. Sci.，2016, 17(6): 978.
[10] Men Z, Fang W, Li D, et al. Sci. Rep.，2014, 4：4606.
[11] Li Z, Li H, Fang W, et al. Opt. Lett.，2015, 40(14): 3253.
[12] Wei-Long L, De-Min W, Zhi-Ren Z. Chin. Phys. B，2010, 19(1): 013102.
[13] Men Z W, Fang W H, Li Z W, et al. J. Raman Spectrosc.，2010, 41：1661.
[14] Tian Y J, Zuo J, Zhang L Y, et al. Appl. Phys. B，2007, 87：727.
[15] Men Z W, Fang W H, Li Z W, et al. J. Raman Spectrosc.，2010, 41：49.
[16] Paraschuk D Y, Kobryanskii V M. Phy. Rev. Lett.，2001, 87：207402.
[17] Salaneck W R, Ingan?s O, Themans B, et al. J. Chem. Phys.，1988, 89：4613.
[18] Tian B, Zerbi G. J. Chem. Phys.，1990, 92：3892.
[19] Castiglioni C, Del Zoppo M, Zerbi G. J. Raman Spectrosc.，1993, 24(8): 485.
[20] Negri F, Orlandi G, Zerbetto F, et al. J. Chem. Phys.，1989, 91(10): 6215.
[21] Zerbetto F, Zgierski M Z, Negri F, et al. J. Chem. Phys.，1988, 89(6): 3681.
[22] Wang S, Fang W, Li T, et al. J. Appl. Phys.，2016, 119(16): 163104.
[23] Champion P M, Albrecht A C. J. Chem. Phys.，1980, 72(12): 6498.
[24] Siebrand W, Zgierski M Z. J. Chem. Phys.，1979, 71(9): 3561.
[25] Vardeny Z, Ehrenfreund E, Brafman O, et al. Phys. Rev. Lett.，1983, 51(25): 2326.
[26] Moses D, Feldblum A, Ehrenfreund E, et al. Phys. Rev. B，1982, 26(6): 3361.
[27] Frank H A, Bautista J A, Josue J, et al. J. Phys. Chem. B，2000, 104(18): 4569.
[28] Tommasini M, Longhi G, Abbate S, et al. J. Raman Spectrosc.，2014, 45(1): 89.
[29] Fiedor L, Fiedor J, Pilch M. J. Phys. Chem. Lett.，2016, 7(10): 1821.
[30] Tian Y J, Zuo J, Zhang L Y, et al. Appl. Phys. B，2007, 87：727.
[31] Ouyang S L, Sun C L, Zhou M, et al. J. Raman Spectrosc.，2010, 41：1650.
[32] Li S, Li Z L, Wang S H, et al. Mater. Res. Bull.，2015, 72：1.
[33] QU Guan-nan, OUYANG Shun-li, WANG Wei-wei, et al(曲冠南, 欧阳顺利, 王微微, 等). Chin. Phys. B，2011, 20(3)：037803.
[34] Tubino R, Dorsinville R, Lam W, et al. Phys. Rev. B，1984, 30：6601.
[35] Qu Guannan, Li Shuo, Wu Yongling, et al. Optik，2013, 124：1547.
[36] Clare M, Edwards I S. Coord. Chem. Rev.，2000, 199：1.
[37] Zhou Mi, Wang Kai, Men Zhiwei, et al. Spectrochimi. Acta Part A，2012, 97：526.
[38] XU Sheng-nan, LIU Tian-yuan, SUN Mei-jiao, et al(徐胜南，刘天元，孙美娇，等). Acta Physica Sinica(物理学报)，2014, 63(16)：167801.
[39] Tian Yanjie, Zuo Jian, Zhang Liuyang, et al. Appl. Phys. B，2007, 87(4)：727.
[40] QU Guan-nan, LI Dong-fei, LI Zhan-long, et al(曲冠南，李东飞，李占龙，等). Acta Physica Sinica(物理学报)，2010, 59(5)：3168.
[41] Qu Guannan, Sun Meijiao, Li Shuo, et al. Spectrochimi. Acta Part A，2013, 104：92.
[42] Qu Guannan, Li Shuo, Liu Tianyuan, et al. Vib. Spectrosc.，2013, 64：27.