Topic
Fourier transform spectroscopy
About: Fourier transform spectroscopy is a research topic. Over the lifetime, 5418 publications have been published within this topic receiving 134133 citations.
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TL;DR: The basic problems of condensed phase infrared emission spectroscopy are discussed in this paper, conditions which cause instrumental background and the method for background removal are reviewed, and the sensitivity of the technique is illustrated with spectra of microgram quantities.
Abstract: The basic problems of condensed phase infrared emission spectroscopy are discussed. Conditions which cause instrumental background and the method for background removal are reviewed. The sensitivity of the technique is illustrated with spectra of microgram quantities. Spectra are shown for samples near room temperature (30°C) and for a sample below room temperature. The major limitations in infrared emission spectroscopy are reviewed and the problems associated with multiple passing of radiation through the modulator are outlined.
55 citations
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TL;DR: The first use of Fourier transform vibrational circular dichroism (FT-VCD) to follow changes in the percent enantiomeric excess (% EE) of chiral molecules in time using a flow cell sampling apparatus is reported.
Abstract: The first use of Fourier transform vibrational circular dichroism (FT-VCD) to follow changes in the percent enantiomeric excess (% EE) of chiral molecules in time using a flow cell sampling apparatus is reported. FT-VCD, as opposed to dispersive scanning VCD, eliminates the need to scan the VCD spectrum in time to monitor the % EE at more than one spectral location. The first use of partial least-squares chemometric analysis to determine % EE values from kinetic sets of VCD spectral data is also reported. These two advances have been used to monitor simultaneously changes in the fractional composition and the % EE of a mixture of two different chiral molecules. This simulates the progress of the chemical reaction from a chiral reactant to a chiral product where the % EE of both molecules can change with time. For the molecules studied, α-pinene, camphor, and borneol, the accuracy of following % EE changes for one species alone is ∼1%, while for simultaneously following % EE changes in two species is ∼2% f...
55 citations
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TL;DR: The present review focuses only on the ATR-mid IR spectroscopy with a special interest for proteins and biological membranes.
55 citations
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TL;DR: In this paper, the degradation of methylene blue dye was evaluated for a series of in situ generated titania resulting from the impregnation of TiCl 4 into NaA zeolites, which were synthesized using alternative silicon sources, namely rice husk and chrysotile, and submitted to different treatments.
Abstract: The degradation of methylene blue dye was evaluated for a series of in situ generated titania resulting from the impregnation of TiCl 4 into a series of NaA zeolites, which were synthesized using alternative silicon sources, namely rice husk and chrysotile, and submitted to different treatments. The resulting catalysts were characterized by X-ray diffraction spectrometry, X-ray photoelectron spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, diffuse reflectance and transmittance infrared Fourier transform spectroscopy, energy dispersive X-ray scanning electron microscopy and differential pulse voltammetry. The generated titania are present in the form of anatase phase, without alteration of the zeolite framework. Homogeneous distribution of Ti is reached for up to 10 wt.% Ti, where higher contents seem to afford isolated conglomerates. The highest catalyst activity was reached with samples having 10 wt.% Ti. Catalyst activity was shown to be comparable to that exhibited by commercial P-25 after 1 h of UV light exposition. Experiments carried out in natural sunlight reached 92% decomposition of the methylene blue dye.
55 citations
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TL;DR: In this article, a co-precipitation method coupled with ultrasound irradiation can lower the crystallite size (15-18nm) and favors in getting a single spinel phase, which is characterized by different techniques: X-ray diffraction (XRD), Energy Dispersive Spectrometry (EDS), Fourier transform spectroscopy (FTIR), vibrating sample magnetometry (VSM) and photoluminescence (PL) emissions.
55 citations