同步辐射红外显微光谱学和成像技术在分析化学中的应用

Application of Synchrotron FTIR Microspectroscopy and Mapping in Analytical Chemistry

同步辐射红外显微光谱作为一种新兴的分析技术,一方面利用了红外光谱可以同时表征有机和/或无机、结晶和/或无定形样品的特点,另一方面充分发挥了同步辐射高亮度和高空间分辨率的特性,因此在对小样品或小样品区域的表征上具有传统红外光谱无法比拟的优势。经过20多年的发展,同步辐射红外显微光谱技术已被广泛地应用于多种分析化学领域并取得了丰硕的研究成果。本文总结了最近几年同步辐射红外显微光谱学和成像技术在文化遗产和考古学、地球和空间科学以及化学和高分子科学中的研究和应用进展。

Synchrotron radiation based Fourier-transform infrared （S-FTIR） microspectroscopy is a new- developed technique, which combines the advantages of FTIR spectroscopy and synchrotron light source. FTIR spectroscopy is an easy, fast, and well-established analytical method to be wildly used in many fields, especially has the ability to characterize different samples （for instance, organic and inorganic materials, or crystalline and amorphous materials） in the same time. On the other hand, the ultra brightness and high spatial resolution of synchrotron light source ensure S-FTIR microspectroscopy is capable of analyzing small samples or small sample areas that conventional FTIR cannot do. After 20 years of development, S-FTIR has been widely used in a variety of analytical chemistry field and obtained an abundant research results. In our previous review, we discussed the application of S-FTIR microspectroscopy in biomedical field, so here we review recent applications of S-FTIR microspectroscopy in some other analytical chemistry areas, including cultural heritage and archaeology, earth and space science, and chemistry and polymer science. It is no doubt that S-FTIR microspectroscopy has become a more and more useful tool to determine the structure of small samples or small sample areas. In the future, a muhiheam synchrotron imaging system, which combine a multibeam synchrotron source with focal plane array（FPA） detectors, with a greatly improved spatial resolution by reducing the diffraction limited spot size an order of magnitude to 0.54 μm × 0.54μm, may further show the merit of S-FTIR technique on the characterization of small samples or small sample areas in various research fields.