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Chinese Journal of Lasers, Volume. 46, Issue 6, 0614017(2019)

Broadband Terahertz Spectroscopy of Levodopa

Zhongjie Zhu1,2,3, Guanhua Ren1,4, Chao Cheng1, Zhipeng Wu1, Jianbing Zhang1,3, Jiaguang Han4, and Hongwei Zhao1,3、*
Author Affiliations
  • 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 3 Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • 4 Tianjin University, Tianjin 300072, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (7)
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    References (37)
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    Figures & Tables(7)
    Diagram of L-DOPA structure

    Fig. 1. Diagram of L-DOPA structure

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    Broadband THz absorption spectra of L-DOPA at room temperature

    Fig. 2. Broadband THz absorption spectra of L-DOPA at room temperature

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    THz absorption spectra of L-DOPA

    Fig. 3. THz absorption spectra of L-DOPA

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    Temperature dependence of THz absorption spectra of L-DOPA

    Fig. 4. Temperature dependence of THz absorption spectra of L-DOPA

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    THz absorption spectra of L-DOPA

    Fig. 5. THz absorption spectra of L-DOPA

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    Vibrational modes of L-DOPA at 1.90, 2.95, 3.27, 9.46, 10.57, and 11.01 THz

    Fig. 6. Vibrational modes of L-DOPA at 1.90, 2.95, 3.27, 9.46, 10.57, and 11.01 THz

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    • Table 1. Comparison of spectra and vibrational modes of absorption peaks of L-DOPA

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      Table 1. Comparison of spectra and vibrational modes of absorption peaks of L-DOPA

      Experimental /THzTheoretical /THzVibrational mode assignment
      293 K83 K0 K
      1.681.711.90Collective vibration; molecule deformation
      2.052.012.26Collective vibration; mainly from ν (N(1)H3+)+t(—C(1)O(1))
      2.382.492.50Collective vibration; molecule deformation
      2.762.802.95Collective vibration
      3.143.233.27Collective vibration;mainly from ν (N(1)H3+,—C(3)H2)
      3.503.55
      3.803.923.89Mainly from w (Ar—O(4)H, —C(1)O(1))+r (N(1)H3+)
      4.454.47Collective vibration; mainly from t (N(1)H3+)+δtw(—C(1)O(1)O2-)
      5.025.24Collective vibration; mainly fromr (N(1)H3+)
      5.585.89Mainly from Φ (R)
      6.016.53Mainly from ν(side chain)
      7.647.47Collective vibration; mainly from w (C(5)H)
      9.149.21Mainly from ν(—C(3)H2)
      9.479.46Mainly from ν(—C(3)H2)
      9.969.87Mainly from ν(—C(3)H2, N(1)H3+)
      10.7510.57Mainly from Φ (R);ν (N(1)H3+)
      11.01Mainly from δ (Ar—O(3)H, —O(4)H)
      12.6312.39Mainly from ν (N(1)H3+,—C(3)H2)
      13.7913.78Mainly from w(C(5)H(9), C(8)H(10))
      14.2813.98Mainly from w(C(5)H(9), C(8)H(10))
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    Zhongjie Zhu, Guanhua Ren, Chao Cheng, Zhipeng Wu, Jianbing Zhang, Jiaguang Han, Hongwei Zhao. Broadband Terahertz Spectroscopy of Levodopa[J]. Chinese Journal of Lasers, 2019, 46(6): 0614017

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    Paper Information

    Category: terahertz technology

    Received: Feb. 14, 2019

    Accepted: Mar. 28, 2019

    Published Online: Jun. 14, 2019

    The Author Email: Zhao Hongwei (zhaohongwei@sinap.ac.cn)

    DOI:10.3788/CJL201946.0614017

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology