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Metallic Salt (metallic + salt)
Selected AbstractsChemInform Abstract: Synthesis and Characterization of the "Metallic Salts" A5Pn4 (A: K, Rb, Cs and Pn: As, Sb, Bi) with Isolated Zigzag Tetramers of Pn44- and an Extra Delocalized Electron.CHEMINFORM, Issue 49 2001Franck Gascoin Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Ionic elastomers based on carboxylated nitrile rubber and magnesium oxideJOURNAL OF APPLIED POLYMER SCIENCE, Issue 3 2007L. Ibarra Abstract The crosslinking of carboxylated nitrile rubber (XNBR) with magnesium oxide (MgO) leads to an ionic elastomer with thermoplastic nature and better physical properties than the ones obtained with other metallic oxides. The crosslinking reaction leads to the formation of a metallic salt as unique product, as it could be seen on the ATR analysis of the samples, prepared at different reaction times. The mechanical properties of the material increase with the amount of crosslinking agent and segregation of an ionic microphase takes place. The presence of this microphase is demonstrated by a relaxation at high temperatures. The apparent activation energy of this relaxation is smaller than the activation energy of the glass transition of the elastomer, the former being more dependent on the amount of metallic oxide than is the latter. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1894,1899, 2007 [source] Research on synthesis and conductivity of ferrocenyl Schiff base and its saltAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 2 2007Wei-Jun Liu Abstract Ferrocenyl Schiff base was synthesized through the condensation of ferrocenecarboxaldehyde and p -phenylenediamine under neutral conditions, and then a new interesting category of organometallic charge transfer complex was obtained by the doping of ferrocenyl Schiff base with Fe3+, Al3+ and Ti3+ salts. The effects of the dosage of doping agent and doping temperature on the room-temperature electric conductivity of samples were discussed; in addition, the temperature dependence of the electric conductivity of samples was studied, their structures and compositions were characterized by 1H-NMR spectra, infrared spectra, ultraviolet spectra and an electron probe X-ray microanalyser. The results showed that the electric conductivity of sample can increase 4,5 orders of magnitude after doping with a metallic salt, and the electric conductivity has a positive temperature coefficient effect. The electrical activation energies of the complexes in the range 0.09,1.54 eV were calculated from Arrhenius plots, indicating their favourable semiconducting behaviour. Copyright © 2006 John Wiley & Sons, Ltd. [source] A survey of the behavior of the hydroxybisphosphonic function in crystallized acids, metallic salts, and some related compoundsHETEROATOM CHEMISTRY, Issue 2 2001J.-P. Silvestre The flexibility and the different degrees of ionization of the hydroxybisphosphonic function provide numerous possibilities for the complexation of metallic and organic cations to molecules possessing these functions. The properties of this class of compounds are very interesting for different industrial and medical applications. They depend in a large part on the nature of the hydrocarbonated chain substituted to CH3 in hydroxyethylidenebisphosphonic acid and of the number and the position of the bisphosphonic groups grafted on this chain. © 2001 John Wiley & Sons, Inc. Heteroatom Chem 12:73,89, 2001 [source] Density functional theory studies on the dissociation energies of metallic salts: relationship between lattice and dissociation energiesJOURNAL OF COMPUTATIONAL CHEMISTRY, Issue 8 2001Chang Kon Kim Abstract The formation and physicochemical properties of polymer electrolytes strongly depend on the lattice energy of metal salts. An indirect but efficient way to estimate the lattice energy through the relationship between the heterolytic bond dissociation and lattice energies is proposed in this work. The heterolytic bond dissociation energies for alkali metal compounds were calculated theoretically using the Density Functional Theory (DFT) of B3LYP level with 6-311+G(d,p) and 6-311+G(2df,p) basis sets. For transition metal compounds, the same method was employed except for using the effective core potential (ECP) of LANL2DZ and SDD on transition metals for 6-311+G(d,p) and 6-311+G(2df,p) calculations, respectively. The dissociation energies calculated by 6-311+G(2df,p) basis set combined with SDD basis set were better correlated with the experimental values with average error of ca. ±1.0% than those by 6-311+G* combined with the LANL2DZ basis set. The relationship between dissociation and lattice energies was found to be fairly linear (r>0.98). Thus, this method can be used to estimate the lattice energy of an unknown ionic compound with reasonably high accuracy. We also found that the dissociation energies of transition metal salts were relatively larger than those of alkaline metal salts for comparable ionic radii. © 2001 John Wiley & Sons, Inc. J Comput Chem 22: 827,834, 2001 [source] | ||||||||||