Showing papers on "Infrared spectroscopy correlation table published in 2017"
01 Jan 2017
TL;DR: In this paper, the basic theory behind FTIR spectroscopy and its various instrumentation aspects are reviewed, and the characteristic vibrational absorption bands used for the identification of key chemical structures as well as methods for quantitative measurement of chemical composition are described.
Abstract: Infrared spectroscopy has always been a powerful tool for the identification of organic materials The development of Fourier transform infrared (FTIR) spectroscopy has introduced a popular method for the quantitative analysis of complex mixtures, as well as for the investigation of surface and interfacial phenomena This chapter reviews the basic theory behind FTIR spectroscopy and its various instrumentation aspects The characteristic vibrational absorption bands used for the identification of key chemical structures as well as methods for quantitative measurement of chemical composition are described here The advantages and disadvantages encountered while using FTIR are also reviewed here
51 citations
TL;DR: In this article, single crystals of DL-valine and DL-lysine hydrochloride were grown by slow evaporation method and the crystallographic structure were confirmed by X-ray diffraction experiment and Rietveld method.
17 citations
TL;DR: The design and construction of a compact, "user-friendly" polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS) instrument at the Center for Functional Nanomaterials of Brookhaven National Laboratory, which allows studying surfaces at pressures ranging from ultra-high vacuum to 100 Torr is described.
Abstract: This paper describes the design and construction of a compact, “user-friendly” polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS) instrument at the Center for Functional Nanomaterials (CFN) of Brookhaven National Laboratory, which allows studying surfaces at pressures ranging from ultra-high vacuum to 100 Torr. Surface infrared spectroscopy is ideally suited for studying these processes as the vibrational frequencies of the IR chromophores are sensitive to the nature of the bonding environment on the surface. Relying on the surface selection rules, by modulating the polarization of incident light, it is possible to separate the contributions from the isotropic gas or solution phase, from the surface bound species. A spectral frequency range between 1000 cm−1 and 4000 cm−1 can be acquired. While typical spectra with a good signal to noise ratio can be obtained at elevated pressures of gases in ∼2 min at 4 cm−1 resolution, we have also acquired higher resolution spectra at 0.25 c...
8 citations
08 Feb 2017
TL;DR: The development of Fourier transform infrared (FTIR) has had widened its scope of perspective application on different types of substances in terms of technique of material analysis and identification.
Abstract: The development of Fourier transform infrared (FTIR) has had widened its scope of perspective application on different types of substances in terms of technique of material analysis and identification. The tri-step infrared analysis has shown its powerful application in the analysis and interpretation of spectra from pure compound, fraction, raw material, natural product and complex mixture.
4 citations
01 Jan 2017
TL;DR: In this article, the principal applications of the infrared method under the headings surface characterization, physical adsorption, and chemisorption and catalysis are surveyed, and the sampling techniques used differ substantially whether the systems under investigation involve finely divided samples (powders or porous solids) or whether the surface involved is flat.
Abstract: The investigation of surfaces, and of molecular layers adsorbed on surfaces, by electromagnetic radiation has been carried out principally by infrared spectroscopy The sampling techniques used differ substantially whether the systems under investigation involve finely divided samples (powders or porous solids) or whether the surface involved is flat After reviewing the experimental techniques involved, the principal applications of the infrared method under the headings surface characterization, physical adsorption, and chemisorption and catalysis are surveyed
2 citations
01 Jan 2017
TL;DR: In this article, the molecular vibrations are decomposed into independent fundamental vibrations, which are called normal modes, and in many cases a normal mode is located on a chemical group in a nearly isolated manner.
Abstract: Infrared (IR) spectroscopy is a physical science on molecular vibrations, with which the molecular characters can be discussed in detail. The molecular characters are represented by the molecular conformation, hydrogen bonding, crystallinity, and orientation as well as the primary chemical structure. If a vibration-excited molecule yields a single band, the spectral information would be too short to reveal the molecular structure. Fortunately, the molecular vibrations are decomposed into independent fundamental vibrations, which are called normal modes. In many cases, a normal mode is located on a chemical group in a nearly isolated manner. Thanks to this characteristic, IR spectroscopy is quite useful to discuss molecular structure with respect to each chemical group.