Topic
Fourier transform infrared spectroscopy
About: Fourier transform infrared spectroscopy is a research topic. Over the lifetime, 48250 publications have been published within this topic receiving 1134369 citations.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, Fe 3 O 4 magnetic nanoparticles (MNPs) are synthesized via plantain peel extract by the biogenic method and the reaction process is simple, eco-friendly and convenient to handle.
198 citations
••
TL;DR: Information on the bonding of organic ligands to hydrous metal oxide surfaces, necessary to gain insight into the mechanisms of surface reactivity, was extracted using attenuated total reflection-Fourier transform infrared spectroscopy.
Abstract: Information on the bonding of organic ligands to hydrous metal oxide surfaces, necessary to gain insight into the mechanisms of surface reactivity, was extracted using attenuated total reflection-Fourier transform infrared spectroscopy. Various ligands were investigated in-situ on the surface of δ-Al 2 O 3 in water. Keeping the study of structure with respect to surface reactivity in the foreground, we report here specifically on the model ligand salicylate, which we also examined on the surfaces of other oxides, including corundum, hematite, lepidocrocite, and goethite. Because the direct ligand-metal bond vibrations absorb in the same region as the metal-oxygen vibrations in the bulk oxide, evidence of bonding was obtained by observing changes in the spectrum of the ligand itself
198 citations
••
TL;DR: In this paper, a new method for synthesis of Fe3O4@SiO2@TiO2/Ho magnetic core-shell nanoparticles with spherical morphology is proposed, and the crystal structures, morphology, and chemical properties of the as-synthesized nanoparticles were characterized using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive X-ray (EDS), XRD), UV-ray diffraction (DRS), and vibrating sample magnetometer (
197 citations
••
TL;DR: In this paper, a polycrystalline Pd disk electrode in alkaline media was studied by in situ Fourier transform infrared (FTIR) reflection spectroscopy, which revealed that most of ethanol was incompletely oxidized to acetate.
197 citations
••
TL;DR: The results showed that all of the polymers synthesized in this study were susceptible to CE-catalyzed hydrolytic degradation, and that the extent of degradation was highly dependent on the nature of hard segment interactions within the polymer and at the surface.
Abstract: Polycarbonate urethanes (PCNUs) have been used as a replacement for traditional biomedical polyether-urethanes due to their reported resistance to oxidative biodegradation. However, relatively little is known about their hydrolytic stability in the presence of inflammatory derived enzymes. This has in part motivated the current study relating to the effect of hard segment chemistry and the microdomain structures generated by such chemistry, on the cholesterol esterase (CE) catalyzed hydrolysis of PCNUs. The bulk structures of the studied materials were characterized using gel permeation chromatography (GPC), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), Fourier transform infrared spectroscopy (FTIR) for their bulk structures, and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) for their subsurface structures. 14C-labeled PCNUs were incubated with CE (400 units/mL), for a period of 10 weeks (pH 7.0 at 37 degrees C), and radiolabel release was used to monitor the degradation. The results showed that all of the polymers synthesized in this study were susceptible to CE-catalyzed hydrolytic degradation, and that the extent of degradation was highly dependent on the nature of hard segment interactions within the polymer and at the surface. More specifically, the degree of phase separation and soft segment crystallinity were found to be less important in comparison to the hydrogen bonding among the carbonate and urethane linkages. The rank of the different chemical groups' susceptibility to hydrolysis was as follows: nonhydrogen bonded carbonate > nonhydrogen bonded urethane > hydrogen bonded carbonate > hydrogen bonded urethane. The findings suggest that the degree of hydrogen bonding, when processed into a polyurethane material could be an important parameter to consider in the design of new biostable polyurethane products.
197 citations