FT-IR investigations

Iwasita T, Nart EC. 1991. Identihcation of methanol adsorbates on platinum An in situ FT-IR investigation. J Electroanal Chem 317 291-298. 

Their hypothesis was confirmed by the work of Aurbach and co-workers, who performed detailed FT-IR investigations on the graphitic anode surface that... 

The Monomer-to-Micelle Transition. Surfactants having relatively high cmcs facilitate FT-IR investigations of the monomer to micelle transition, since monomer solutions can be prepared at concentrations that readily provide acceptable signal/noise ratios. However, if the cmc is too high, it is not always possible to prepare concentrated, isotropic micellar solutions for comparison with those of the monomer. Of the amine oxide surfactants studied here, C AO is the best choice for examining this transition since its cmc (0.11 M to 0.15 M) is in an appropriate range. 

The high efficiency is presumably due to activation of epoxide assisted by hydrogen bonding and activation of C02 by the oxygen atoms of the ether linkages of PEG [16, 17], or the presence of the secondary amino group in the cation, which has the potential to activate C02 molecule [18-24], on the basis of in situ FT-IR investigation under C02 pressure. 

The formation of acidic and metallic sites has been investigated in detail at pressures of 2 to 5 Torr (0.3-0.6 kPa) after in-situ reduction of catalyst samples and by FT-IR investigation of pyridine adsorption as a function of temperature. The amounts of hydrogen chemisorbed proved to be pressure-independent under these conditions. 

The flow chart emphasizes the two types of information that can be derived from FT-IR investigations ... 

RhCls/Cab-O-Sil catalyst (2.85% Rh measured by x-ray fluorescence and by neutron activation) for the FT-IR investigations was prepared by impregnation of Cab-O-Sil 5 support (BDH, pure, neutral Si02, = 240... 

FIGURE 9.7 FTIR spectra of a G40H PAMAM dendrimer supported on y-alumina obtained at different temperatures in flowing Hj. From D.S. Deutsch, A. Siani, C.T. Williams, and M.D. Amiridis, FT-IR Investigation of the Thermal Decomposition fo Poly(amidoamide) (PAMAM) Dendrimers and Dendrimer-Metal Nanocomposites Supported on AI2O3 and Z1O2, Journal of Physical Chemistry B, Submitted 2006. 

The challenge of elucidating the structure of the 2-chloroaIlyl cation prompted Kidemet et al to embark on a combined computational and FT-IR investigation. In going from the 1-chloroallyl cation to the 2-chloroallyl cation the charge on chlorine decreases fi om 0.333 to 0.156 (NPA) or from 0.127 to —0.001 (AIM), respectively. Also, the C-Cl bond order, calculated by the AIM method changes fi om 1.445 in the tra s-l-chloroallyl cation to 1.183 in the 2-chloroallyl cation. 

Solvation numbers of actinide cations in non-aqueous media are almost an unexamined field. FT-IR investigations of the homologous solvates [Ln(N03)3(DMS0) ] in anhydrous acetonitrile (Biinzli etal. 1990) indicated a change in coordination number in the middle of the series [ca. Eu(III)] from nine to eight with increasing atomic number. In the presence of large excess of DMSO([DMSO]j/[Ln]( = 6), the coordination numbers can be increased by one unit. NMR spectroscopy and crystal stoichiometries have indicated a solvation number of two for the uranyl cation in pure TBP (TBP is tributylphosphate). The overall coordination number in this case should include two for TBPs coordination and four for the bidentate nitrate coordination (Siddall and Stewart 1967). 

Scire S, Minico S. The Role of the Support in the Oxidative Destruction of Chlorobenzene on Pt/Zeolite Catalysts An FT-IR Investigation. Catal Lett 2003 91 199-205. 

Armaroh, T., Bevilacqua, M., Trombetta, M., Milella, R, GutierrezAlejandre,A., Ramirez Sohs, J., Notari, B., Willey, R.J., and Busca, G. A study of the external sites of MFI-type zeolitic materials through the FT-IR investigation of the adsorption of nitriles, Catal. A Gen. 2001,216, 59-71. 

YilgOr, L, YilgOr, E., Guler, I. G., Ward, T. C., Wilkes, G. L. (2006), FT-IR investigation of the influence of diisocyanate symmetry on the morphology development in model segmented polyurethanes, Polymer, 47,4105-14. 

Alumina with neutral, basic and acidic (both Lewis type) surfaces was introduced into PE0ME-LiC104 electrolytes of various concentrations and examined with a variety of techniques. At higher salt concentrations when aggregation of ions occurs, fillers led not only to a decrease of the viscosity, but also to an increase in the fraction of free ions. The best results were obtained in the case of acidic fillers (Fig. 2.7). This results from interaction of acidic surface states with anions (Lewis bases) present in electrolyte as free ions, ion pairs, triplets, etc. The latter especially affect the viscosity and cation transference number. With the use of acidic filler, the fraction of free ions was increased as confirmed by Fuoss-Kraus calculations, as well as by Fourier transform infrared (FT-IR) investigations (Marcinek et al. 2005). The increase in the fraction of free ions means an increase of the number... 

BISHOP A, MACFARLANE D R, MCNAUGHTON D and FORSYTH M, FT-IR investigation of ion association in plasticized solid polymer electrolytes , / F/iys Chem, 1996, 100,2237-2243... 

BASKARAN, R., SELVASEKARAPANDIAN, S., KUWATA, N., et al., Ac impedance, DSC and FT-IR investigations on (Y)PVAc-(l-x)PVdF blends with LiC104, Mater. Chem. Phys., 2006,98,55-61. 

Musto and others reported FT IR investigation of the blend system consisting of PBI and poly (etherimide) (PEI, Tg 220°C), poly [2,2 -bis[4-(3,4-dicarboxyphenoxy) phenyl] propane-m-benzenediamine], or commercially available Ultem 1000, showing evidence of hydrogen bonding between... 

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