Terahertz time-domain spectroscopic investigation on quinones

• 来源期刊: 中国科学B辑（英文版）
• 年，卷（期）: 2008,（4）
• 页码范围: 354-358
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s 11426-008-0004-9

摘要

Well resolved far-infrared spectra of 1,4-benzoquinone, 1,4-naphthoquinone, and 9, 10-anthraquinonme in polycrystalline form have been measured with terahertz time domain spectroscopy at room tem-perature. The characterizations of power absorption and index of refraction in the frequency range 0.3 -2.0 THz are presented. Theoretical calculation is applied to assist the analysis and assignment of individual THz absorption spectra of the p-quinones with semiempirical AM1, Hartree-Fock (HF), and density functional theory (DFT) method. Observed THz responses are assigned to the translational and torsional vibrations of p-quinone dimer held together by weak hydrogen bonds.