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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01 Jun 1997
TL;DR: The rotational spectrum of the van der Waals complex consisting of argon and 2,5-dihydrofuran has been observed in a molecular beam Fourier transform microwave spectrometer in the frequency range 5-18.5 GHz.
Abstract: The rotational spectrum of the van der Waals complex consisting of argon and 2,5-dihydrofuran has been observed in a molecular beam Fourier transform microwave spectrometer in the frequency range 5–18.5 GHz. Analysis of the derived spectroscopic constants shows that the dimer has a structure with a plane of symmetry in which the argon atom is located 3.48 A above the ring plane. The experimental setup of the molecular beam Fourier transform microwave spectrometer is also presented.
81 citations
81 citations
TL;DR: In this paper, a uniform Al2O3 films were deposited on silicon substrates by the sol-gel process from stable coating solutions and the technological procedure includes spin coating deposition and investigating the influence of the annealing temperature on the dielectric properties.
81 citations
TL;DR: Polarized, low-temperature Fourier transform infrared (FTIR) difference spectroscopy has been used to investigate the structure of bacteriorhodopsin as it undergoes phototransitions from the light-adapted state, bR570, to the K630 and M412 intermediates.
Abstract: Polarized, low-temperature Fourier transform infrared (FTIR) difference spectroscopy has been used to investigate the structure of bacteriorhodopsin (bR) as it undergoes phototransitions from the light-adapted state, bR570, to the K630 and M412 intermediates. The orientations of specific retinal chromophore and protein groups relative to the membrane plane were calculated from the linear dichroism of the infrared bands, which correspond to the vibrational modes of those groups. The linear dichroism of the chromophore C=C and C-C stretching modes indicates that the long axis of the polyene chain is oriented at 20-25 degrees from the membrane plane at 250 K and that it orients more in-plane when the temperature is reduced to 81 K. The polyene plane is found to be approximately perpendicular to the membrane plane from the linear dichroism calculations of the HOOP (hydrogen out-of-plane) wags. The orientation of the transition dipole moments of chromophore vibrations in the K630 and M412 intermediates has been probed, and the dipole moment direction of the C=O bond of an aspartic acid that is protonated in the bR570----M412 transition has been measured.
80 citations
TL;DR: A novel strategy for determining the elemental composition of organic compounds using the peak ratio of isotopic fine structure observed by high-magnetic field Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), which should be particularly amenable to the metabolomics research field.
Abstract: We propose a novel strategy for determining the elemental composition of organic compounds using the peak ratio of isotopic fine structure observed by high-magnetic field Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). Using 3′-phosphoadenosine 5′-phosphosulfate and CTU guanamine as standard organic compounds, isotopic peaks derived from 15N-, 34S-, and 18O-substituted forms were separated from 13C-substituted species. Furthermore, these isotopic peaks were quantitatively detected and closely matched the natural abundance of each element. These data successfully led us to determine the one elemental composition in a standard independent manner. The approach should be particularly amenable to the metabolomics research field.
80 citations