Authors:M. Soliman, Gehad Mohamed, and Eman Mohamed
IR spectral studies
The IR data of the spectra of FEN drug and its complexes are listed in Table 2 . The IRspectra of the complexes are compared with this of the free FEN drug in order to determine the coordination sites that may be involved
Authors:Zs. Csanádi, P. Cserjési, N. Nemestóthy, and K. Bélafi-Bakó
FT-IR spectra of various pectin preparations extracted from press cakes of red and black currant, raspberry and blackberry have shown structural differences. Based on the spectra data degree of esterification (DE) of the pectins was determined and found to be in the range of 50–65.
Composite sorbents based on potassium nickel ferrocyanide embedded in silica gel matrix were prepared and characterised by
powdered X-ray diffraction analysis, IR spectra, Mössbauer spectra and electron microscopy. The sorbent exhibits very good
efficiency for cesium uptake and radiation resistance. The sorption capacity for cesium ions is comparable with the capacity
for the pure ferrocyanides.
An attempt to prepare directly the title uranate by precipitation from uranyl solutions was successful if the preparation temperature was close to 100°C. The product was chemically and thermally analyzed, its IR spectra and X-ray patterns were taken; these results are commented and a reason for explanation of the molecular water behaviour is proposed.
Two new solid binuclear complexes of the compositions [(UO2)2(HL)3]NO3, and [Th2(HL)3(NO3)2](NO3)3 (H2L=o-vanillylidene anthranilic acid) have been synthesized and characterized by elemental analyses, DTA-TG, IR spectra, UV spectra and molar conductance. Possible structures of the two complexes have been proposed.
Authors:Bi Caifeng, Fan Yuhua, Sun Guoxin, and Chang Jun
Two new solid complexes, [ThL(NO3)2](NO3)2, [UO2L(NO3)]NO3 (L=o-vanillin-p-phenylenediamine) have been synthesized and characterized by elemental analyses, DTA-TG, IR spectra, UV spectra and molar conductance. Possible structures of the two complexes are proposed.
Authors:H. Rathore, G. Varshney, S. Mojumdar, and M. Saleh
Zinc diethyldithiocarbamate, zinc diethyldithiocarbamate-phosphate and zinc phosphate have been synthesized. They have been
characterized using DTA-TG, IR spectra and X-ray. The dithiocarbamate and phosphate contents have been determined spectrophotometrically
and volumetrically, respectively. Fungicidal activity of the compounds has been tested by well diffusion method using fungi
Authors:Alexandra Ioiţescu, Gabriela Vlase, T. Vlase, G. Ilia, and N. Doca
The synthesis of four types of hydroxyapatite synthesized from calcium chloride and four different organic phosphites is presented.
The method of synthesis chosen is the sol–gel route, which has a number of advantages compared to other methods, like the
intimate contact between reactants and the milder synthesis conditions. The samples were thermally treated, the TG/DTG/DTA
curves being obtained at four heating rates, namely: 7, 10, 12 and 15 °C min−1. The samples were characterized before and after the thermal treatment using FT-IR analysis. The FT-IR spectra certified
that the formed compounds represent hydroxyapatite. Based on the information from the TG curves and IR spectra interpretation,
a reaction mechanism was proposed.
Authors:E. Jóna, M. Sapietová, S. Šnircová, M. Pajtášová, D. Ondrušová, V. Pavlík, L’. Lajdová, and S. Mojumdar
Thermal analysis (TG, DTG), powder diffraction analysis (XRD) and infrared (IR) spectra were used to study of composition
and release of benzimidazole from Ni(II)-exchanged montmorillonite under heating. Diffraction analysis indicated that benzimidazole
molecules are intercalated into the interlayer space of montmorillonite. IR spectra and the analytical characteristics have
shown that different type of interactions of benzimidazole is connected with different reaction conditions (acid or neutral
solution). The release of benzimidazole from Ni(II)-montmorillonite under heating from studied samples proceeds in three distinct
steps. The first step can be assigned to the release of water molecules while the last (third) one corresponds to the lattice
dehydroxylation. The second step can be assigned to release of chemically bonded benzimidazole.
Solid complexes of two derivatives of Schiff bases SAT and SAZ with Pr(III), Nd(III), Gd(III), Dy(III), Ho(III), Er(III) and
Yb(III) were prepared and characterized by elemental analysis , IR spectra and TG. The suggested formula of the obtained solid
complexes is [MLCl2(H2O)n] for sat and [MLCl (H2O)n] for SAZ where M=trivalent lanthanide ion, L=deprotonated ligand and n=2-3. The TG gives information about the coordinated water molecules, thermal stability and the coordination number of M which was found to be 6–8. A scheme of thermal decomposition of the complexes is also proposed. Comparison of the IR spectra
of the ligands with those of their complexes indicate the center of chelation in SAT and SAZ which act as tridentate ligands.