Showing papers in "Vibrational Spectroscopy in 1998"

TL;DR: In this article, the infrared and Raman spectra of crystalline acid NH CH COOHP Cl and alkaline Na P NHCH COO 32 2 2 glycine salts were recorded and interpreted.

TL;DR: In this article, infrared emission spectroscopy of the clay minerals attapulgite, sepiolite and ''Rocky Mountain leather'' has been used to characterise the thermal degradation over the temperature range of 100 to 700°C.

TL;DR: In this paper, the authors used ab initio force field calculations for the vibrational analysis of the IR and Raman spectra of three different structural types of melamine derivatives, including tris- and hexa-methoxymethyl melamines (TMMM) and s-triazine substituted with 3 methyl carbamate groups (TMCT).

TL;DR: In this article, the authors used Raman spectroscopies to identify the complexed species of uranyl with hydroxide and acetate in aqueous solutions as a function of pH and metal-to-ligand ratio.

TL;DR: In this paper, the Fourier transform Raman and surface-enhanced Raman spectra on the colloid of the dithiocarbamate fungicides thiram, ziram and metiram are reported.

TL;DR: In this article, the presence of carboxylate structures in the infrared and Raman spectra of dilute aqueous solutions (0.05 to 0.6 M) with alkaline-earth or copper(II) cations and acetate anions is studied at room temperature.

TL;DR: In this paper, it was shown that the strong decrease of the intensity of the ν (OH) bands is a specific feature of the intramolecular hydrogen bonding in comparison to related intermolecular complexes.

TL;DR: In this article, the site symmetries of intrinsic uranate groups are deduced by comparing the number of observed and resolved bands with the number predicted by the various site symmetry subgroups.

TL;DR: In this article, a new electrochemical procedure of roughening of a copper surface was developed, producing a surface with a high surface-enhanced Raman scattering (SERS) activity.

TL;DR: In this paper, the relationship between infrared data and plastic properties, volatile matter content, textural properties and combustion behavior of coal ashes was discussed, and a relationship between the carbonyl-to-hydrogen ratio and characteristic temperatures of the burning profiles of coal combustion was observed.

TL;DR: In this paper, the diffuse reflectance infrared Fourier transform (DRIFT) spectrum of stearic acid (STA) on 2 μm-sized silver particles is recorded, and the usual surface selection rule that applies to flat metal surfaces is confirmed even to the surface of fine metal particles.

TL;DR: In this article, the second derivative spectra of powder samples have been used to make assignments of NIR bands of the proteins, and the results showed that the chemometrics models can pick up effectively the information about albumin and γ-globulin, even if the models have been constructed from the spectra from the proteins in the dilute solutions.

TL;DR: In this paper, a scanning near-field optical microscope (SNOM) was coupled with a commercial Raman spectrometer to produce an instrument capable of obtaining Ramran spectra with a spatial resolution of 100-200 nm.

TL;DR: In this article, the polarization modulation infrared linear dichroism (IRLD) was used to study the time dependence of the orientation function of polystyrene PS and poly vinyl methyl ether PVME blends.

TL;DR: In this article, the FTIR spectrum of thiourea and d 4 isolated in argon and nitrogen matrices is presented for the first time and discussed in terms of normal modes predicted by ab initio calculations.

TL;DR: Fourier transform infrared (FTIR) spectroscopy in combination with a sequential injection analysis (SIA) manifold was used for the investigation of the kinetic properties of the quantitative analysis of the reaction mixtures.

TL;DR: In this paper, a near infrared (NIR) spectroscopy has been successfully implemented for the rapid and nondestructive analysis of ethylene content in flake and pellet of propylene/ethylene copolymer.

TL;DR: In this paper, an electrically heated gas-permeation unit (GPU) was employed for the vapor-generation Fourier transform infrared (FTIR) determination of total carbonate in waters.

TL;DR: In this paper, the envelope of the CN stretching band of propionitrile in the Raman spectrum between 2300 and 2200 cm −1 was studied and the presence of a pseudoisosbestic point in the area-normalized spectra indicated that there were only two linearly independent components in the band envelope.

TL;DR: The phase transition at 95 K in Cs3Bi2Br9 has been investigated in detail by the Raman spectroscopy as mentioned in this paper, and a systematic study on temperature dependencies of the frequencies and bandwidths in the wavenumber range 0−250 cm−1 confirmed continuous nature of the phase transition.

TL;DR: In this paper, the mid and near-infrared spectra of hydrogen bond complexes between phenol derivatives and N,N-dimethylformamide are investigated and the enthalpies of complex formation determined in carbon tetrachloride range from 23 to 26.6 kJ mol−1.

TL;DR: In this article, band fitting performed for the frequency range 25-250 cm −1 shows that four bands have contributed to spectra of glycerol and triacetin in this region.

TL;DR: In this article, the authors synthesised a deuterated version of the CH 2 Br group with the same properties as the parent CH 3 ) 2 SiH (BDSD) for the first time at various temperatures between 295 and 160 K and spectra of amorphous and crystalline solids.

TL;DR: In this article, the ferroelectric phase transition at 242 K in single crystals of [(CH 3 ) 2 NH 2 ] 3 Sb 2 Cl 9 (DMACA) has been investigated by the Raman spectroscopy over the range 3500-400 cm −1.

TL;DR: In this paper, four series of zinc-based mixed oxides doped with Fe, Cu or Ti were characterized using vibrational spectroscopies, in conjunction with previous studies in which the same sorbents were studied by XRD, SEM-EDX and XPS.

TL;DR: In this article, infrared emission spectroscopy is used to characterize the composition of thin film deposits resulting from the combustion of black liquor and the deposition of submicron aerosols and vapors.

TL;DR: In this paper, Ramaman and infrared spectra of a series of phosphates Mn0.5+xTi2−2xCr2x(PO4)3 {0≤x≤ 0.5} have been recorded in crystalline state.

TL;DR: In this paper, Fourier transform infrared (FT-IR) spectrometry with attenuated total reflectance (ATR) was used for the determination of absorption and difference spectra of Rapana venosa hemolymph and of purified hemocyanin in solution or as lyophilized sample.

TL;DR: In this article, the segmental mobility of a ferroelectric liquid-crystalline polymer (FLCP) in the S c * phase was studied using time-resolved Fourier transform infrared (FT-IR) spectroscopy and correlation analysis.

TL;DR: In this paper, the authors performed FTIR analysis of Ar and N 2 cryogenic matrices doped with thiourea and silver atoms and showed the generation of a sulfur coordinated complex, which has most likely the Ag[CS(NH 2 ) 2 ] formula.