Temperature Characteristics of Huang-Ryes Factor of All-Trans-β-Carotene
LI Shuo1, SUN Shang1, LI Zuo-wei1, QU Guan-nan1, LIU Tian-yuan1, SUN Cheng-lin1, FAN Li-mei1, 2*
1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China 2. Second Hospital of Jilin University, Changchun 130041, China
Abstract：A Visible absorption and Raman spectra of all-trans-β-carotene was measured in cyclohexanol solution in the temperature range from 68 ℃ to 26 ℃. The results indicated that the visible absorption spectra are red-shifted, Raman scattering cross section increases, Huang-Ryes factor and electron-phonon coupling constants of CC bond vibration modes decreases with the temperature decreasing. The changes are interpreted using the theory of “coherent weakly damped electronic-lattice vibration model” and “effective conjugation length model”. The red shift of the absorption spectra and intensity of the Raman active are attributed to the thermal conformational change-induced increase in the effective conjugation length in all-trans-β-carotene chains. All-trans-β-carotene has strong coherent weakly damped CC bonds vibrational properties, which lead to large Raman scattering cross section in the solvent of low temperature. The electron-phonon coupling constants with dimension are used，which can easily establish relation with the Huang-Rhys factor and calculate the electron-phonon coupling constants of CC bond vibration modes. Effective conjugation length, the π-electron delocalization range and the Raman scattering cross section are described by the electron-phonon coupling constants.
李 硕1，孙 尚1，里佐威1，曲冠男1，刘天元1，孙成林1，范丽梅1, 2* . β-胡萝卜素分子的黄琨因子的温度特性 [J]. 光谱学与光谱分析, 2013, 33(09): 2311-2314.
LI Shuo1, SUN Shang1, LI Zuo-wei1, QU Guan-nan1, LIU Tian-yuan1, SUN Cheng-lin1, FAN Li-mei1, 2* . Temperature Characteristics of Huang-Ryes Factor of All-Trans-β-Carotene. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(09): 2311-2314.
[1] Mckenzie J L，Waid M C，Shi R Y，et al. Biomaterials, 2004, 25: 1309. [2] Choudhury K R，Sahoo Y，Prasad P N. Adv. Mater., 2005, 17(23): 2877. [3] Sugisaki M，Fujiwara M，Nair S V，et al. Phys. Rev. B, 2009，80(3): 035118. [4] Tian Y J，Zuo J，Zhang L Y，et al. Appl. Phys. B, 2007, 87(4): 727. [5] Rumi M，Zerbi G，Myllen K. J. Chem. Phys., 1997, 106: 24. [6] Paraschuk D Y，Kobbryanskii V M. Phys. Rev. Lett., 2001, 87: 207402. [7] Gierschner J，Mack H G，Lüer L，et al. J. Chem. Phys., 2002, 116(19): 8596. [8] Renge I，Grondelle R V. J. Photochem. Photobiol., A, 1996, 96: 109. [9] Qu G N, Li S, Sun C L, et al. Chin. Phys. B, 2012, 21(12): 127802. [10] Biswas N，Umapathy S. Appl. Spectrosc., 1998, 52(4): 477. [11] Dudik J M，Johndon C R，Asher S A. J. Chem. Phys., 1985, 82: 1732. [12] Henderson B，Imbusch G F. Optical Spectroscopy of Inorganic Solids. Clarendon, Oxford, 1989. [13] Peeters E，Ramos A M，Meskors S C J，et al. J. Chem. Phys., 2000, 112: 9445. [14] Hagler T W, Pakbaz K, Voss K F, et al. J. Phys. Rev. B, 1991, 44: 8652. [15] Tubio R, Dordinville R, Lam W, et al. Phys. Rev. B, 1984, 30: 6601.
