Formation of paramagnetic adsorbed molecules on thermally activated magnesium and calcium oxides. Characteristics of the active surface sites

Abstract

The bond lengths and angles found in the 4-nitroimidazolato ligand are similar to those found in other cobalt(III) pentaammine imidazolate complexes18"20 although the quality of the data set obtained has allowed a more accurate determination in the present case. The geometry of the nitro group is similar to that found in the structure of another 4-nitroimidazole molecule.21Results of the mean-plane calculations indicate that the imidazole ring and the nitro group are coplanar. The three equatorial N4 donor atom planes are very nearly orthogonal (18) Davis, W.

Synthesis and Performance of BaAl2O4 with a Wide Spectral Range of Optical Absorption

“…Moreover, based on TPR analysis of BaAl 2 O 4 samples synthesized at different temperatures, oxygen-vacancy concentration formed by reduction was found to be closely related to the cal- There have been numerous studies of the surfaces of insulating metal oxides in an attempt to clarify the type of defect sites that can exist. [36][37][38][39] The most common defects are coordina- Additionally, it is important to note that the character of the impurity state introduced by oxygen vacancies in this work is different from the widely researched oxygen vacancies in TiO 2 , PbWO 4 , and so on. In those cases, the impurity state is just below the conduction band, sometimes even overlapping with the conduction band.…”

Preparation of Heat Insulating Nanocomposite Film with MPS (Mercaptopropyl Trimethoxysilane) Coated-Nanoparticles

“…In order to apply to alumina aerogels a method similar to that proposed for silica, we selected aluminium sec-butylate, a commercially available compound, which is soluble in sec-butanol [9][10]. The precipitation starts immediately after the first addition of water.…”

“…Alumina aerogels were prepared from a 10% (by weight) solution in sec-butanol of aluminium sec-butylate hydrolyzed by various quantities of water, the solvent being evacuated in the autoclave. General procedures are described below for MgO and CaO [9,10]. In a three-necked 2 L round bottom flask equipped with a mechanical stirrer, water cooled-condenser, and argon inlet with a three-way stopcock was placed 300 mL of toluene.…”

“…In this way, the rubbersilica adhesion is increased and consequently the reinforcing effect of the silicas is enhanced [4,5]. Al 2 O 3 , MgO and CaO nanoparticles were prepared from different precursors to the corresponding metal oxide that are insulating materials during thermal treatment was studied extensively in the past [6][7][8][9][10]. In the light of these studies, we applied silane coupling agent modified-inorganic fillers (silicas, Al 2 O 3 , MgO and CaO) to filler-polymer nanocomposites as the reinforcing fillers which can improve mechanical properties and heat insulating ability in the insulating wavelength range (700-1400 nm) of EVA (ethylene vinylacetate) film.…”

Decomposition of CCl3F over vanadium oxides and [MgVxOy]MgO shell/core-like particles

“…The properties of these oxides have been thoroughly studied [9][10][11][12][13] and the advantages of their nanoparticulate form have been well documented.…”