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: In this paper, the synthesis and structural characterization of AV-1 (Aveiro microporous solid no. 1), the first synthetic yttrium silicate containing stoichiometric amounts of framework sodium cations, are reported.
Abstract: The synthesis and structural characterization of AV-1 (Aveiro microporous solid no. 1), the first synthetic microporous yttrium silicate containing stoichiometric amounts of framework sodium (and yttrium) cations, are reported. AV-1, Na4K2Y2Si16O38·10H2O, possesses the structure of the rare mineral montregianite. The synthesis and structural characterization of AV-2, an alkali calcium silicate hydrate (ideal composition HKCa2Si8O19·6H2O) analogue of the rare mineral rhodesite, are also reported. The structures of AV-1 and AV-2 are characterized by the same type of double silicate layers, but important differences exist with respect to the constitution of the octahedral layers and channel species. AV materials have been characterized by a range of techniques, viz., scanning electron microscopy (SEM), powder X-ray diffraction (XRD), 29Si and 23Na single- and triple-quantum (3Q) magic-angle spinning (MAS) NMR spectroscopy, Fourier transform spectroscopy (FTIR), and thermogravimetric analysis (TGA).
35 citations
TL;DR: In this article, conformational substates (CSs) of deoxyribonucleic acid (DNA), essential for its dynamics and function, are revealed by a low-temperature method.
Abstract: Conformational substates (CSs) of deoxyribonucleic acid (DNA), essential for its dynamics and function, are spectroscopically revealed by a new low-temperature method. Hydrated films of the sodium ...
35 citations
TL;DR: In this article, the improvement in time resolution of a Fourier transform infrared spectrometer by the implementation of the step-scan technique is demonstrated with reference to the study of the electric-field-induced orientation and relaxation phenomena of a liquid crystal.
35 citations
TL;DR: The energy disposal and branching ratios in the reactions of O(1D2) with CHCl3 and CHF3 have been measured using an implementation of time-resolved Fourier transform spectroscopy in this laboratory as mentioned in this paper.
Abstract: The energy disposal and branching ratios in the reactions of O(1D2) with CHCl3 and CHF3 have been measured using an implementation of time‐resolved Fourier transform spectroscopy in this laboratory. The infrared emission from the products of the reactions is measured as a function of time after the creation of the O(1D2) atom by UV photolysis of ozone. The reaction with CHCl3 produces OH, HCl, and CO as primary products. The OH vibrational excitation indicates simple abstraction dynamics. The HCl has much lower vibrational excitation, characteristic of a longer‐lived insertion‐elimination process, which also produces CO in the decomposition of the internally excited Cl2CO product. Only HF is observed in the reaction with CHF3. In this case the vibrational distribution is nonmonotonic, indicating contributions from two microscopic channels, possibly associated with the formation of F2CO in both the ground (X 1A1) and first excited (A 1A2) states.
35 citations
TL;DR: In this paper, the CaCO3 particles were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and thermogravimetry analysis (TGA) methods.
34 citations