Photoelectron spectroscopy and DFT calculations of easily ionized quadruply bonded [[Mo.sub.2][.sup.4+] compounds and their bicyclic guanidinate precursors

Article Abstract:

Photoelectron spectroscopic study of a series of five bicyclic guanidinate compounds containing various combinations of five- and six-membered rings and substituted alkyl groups have shown that such compounds are easily ionized, with the one having two six-membered rings and four ethyl groups being the most easily ionized. It is shown that the corresponding anions are capable of forming paddlewheel compounds having quadruply bonded {[Mo.sub.2][.sup.4+]} units which are also easy to ionize.

Molybdenum Compounds, Analysis, Oxidation-reduction reaction, Oxidation-reduction reactions, Optical properties, Density functionals, Density functional theory, Photoelectron spectroscopy, Ionization, Chemical properties

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Enhanced electrorheological activity of mesoporous Cr-doped Ti[O.sub.2] from activated pore wall and high surface area

Article Abstract:

A new mesoporous Cr-doped Ti[O.sub.2] electrorheological (ER) material is prepared by a copolymer-templated sol-gel method in order to enhance ER activity by improving interfacial polarization. The enhancement of the ER activity of mesoporous Cr-doped Ti[O.sub.2] is explained by the improvement of dielectric properties due to the presence of a high surface area mesoporous structure.

Science & research, Chromium Compounds, Research, Electric properties, Polymers, Mechanical properties, Polymer rheology

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