State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Sci Rep. 2018 Jun 12;8(1):8964. doi: 10.1038/s41598-018-27310-7.
In this paper, the terahertz (THz) and infrared (IR) characteristic absorption spectra of aqueous glucose solutions and aqueous fructose solutions with different concentrations were measured and studied. The absorption spectra of these two molecules in solid-state and in aqueous solutions were compared and analyzed, the significant effect of molecular adjacent environment on the molecular structure and vibrational mode was revealed. In addition, the THz and IR absorption spectra of these two isomers' aqueous solutions were also compared and explored. No obvious differences were found from their IR absorption features measured at room temperature, while their THz absorption spectra do have the differences, indicating THz characteristic absorption spectra more suitable for the detection and identification of aqueous glucose and fructose solutions. The results are helpful to understand the influence of aqueous solutions environment on the molecular structures and vibrational modes of the materials, and also provide a theoretical reference for the quantum chemical calculation of biological macromolecules.
本文测量并研究了不同浓度的水合葡萄糖溶液和水合果糖溶液的太赫兹（THz）和红外（IR）特征吸收光谱。比较和分析了这两种分子在固态和水溶液中的吸收光谱，揭示了分子相邻环境对分子结构和振动模式的显著影响。此外，还比较和探讨了这两种异构体水溶液的太赫兹和红外吸收光谱。从室温下测量的红外吸收特征来看，它们没有明显的差异，而它们的太赫兹吸收光谱确实存在差异，这表明太赫兹特征吸收光谱更适合于检测和识别水合葡萄糖和果糖溶液。研究结果有助于了解水溶液环境对材料分子结构和振动模式的影响，也为生物大分子的量子化学计算提供了理论参考。
