13963-57-0Relevant articles and documents
Formation, nature of activity, and hydrogenation catalysis by nickel bis(acetylacetonate)-lithium tetrahydroaluminate systems
Belykh,Titova,Rokhin,Shmidt
, p. 1911 - 1918 (2010)
A new approach to synthesis of nickel catalysts under the action of lithium tetrahydroaluminate was proposed which allows preparation of high-performance nanosized catalytic systems with well-reproducible properties. The major stages of formation and the
Low field magnetoconductance studies in aggregated Al nano-clusters
Dhara,Panigrahi,Magudapathy,Nair
, p. 284 - 287 (2001)
Nano-aggregates of Al have been formed by 70 keV He+ irradiation on spin cast films of aluminum acetyl acetonate. Three fold increase in conductivity was observed for a fluence range of 1×1016-5×1017 ions/cm2. Electrical transport of the charge carriers was observed to follow Mott's variable range hopping (VRH) mechanism in 3D nano-aggregates of Al in the temperature regime of 110-300 K. Low field (≤1 T) magnetoresistance (MR) studies in these samples showed change in sign of MR from positive for a sample with low zero field resistance [R(H = 0)] to negative for samples with high R(H = 0) owing to quantum interference phenomena of hopping paths.
Acid-Mediated Synthesis of Ordered Mesoporous Aluminosilicates: The Challenge and the Promise
Krishna, Nunna V.,Selvam, Parasuraman
, p. 1604 - 1612 (2017/02/10)
A new intrinsic hydrolysis method was employed, for the first-time, to synthesize well-ordered H-AlSBA-15 with trivalent aluminium exclusively in the tetrahedral framework structure of SBA-15. Unlike other methods, which involve incorporation of aluminium ions in both the framework (Br?nsted) and non-framework (Lewis) sites of the silicate matrix, the intrinsic hydrolysis method isomorphously substitutes aluminium ions in the tetrahedral network even at high aluminium content. This unique approach relies mainly on the hydrolysis rates of the inorganic (silicon and aluminium) precursors used for the preparation in such a way that the condensation occurs simultaneously so as to overcome the usually encountered difficulties in stabilizing aluminium ions in the silicate matrix. In this way, we could successfully synthesize high quality Br?nsted acidic H-AlSBA-15, hitherto not reported. The synthesized materials were systematically characterized by various analytical, spectroscopic, and imaging techniques, including XRD, Brunauer–Emmett–Teller (BET) surface area measurements, TEM, SEM,29Si and27Al magic angle spinning NMR spectroscopy, X-ray fluorescence (XRF), and NH3temperature-programmed desorption (TPD). The characterization results reveal the presence of a highly porous structure (with narrow pores) and tetrahedrally coordinated trivalent aluminium in the silicate matrix with more medium to strong Br?nsted acid sites. The resulting high quality catalysts exhibit excellent activity for tert-butylation of phenol with high selectivity towards para-tert-butyl phenol and 2,4-di-tert-butyl phenol.
PROCESS FOR THE PREPARATION OF METAL ACETYLACETONATES
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Page 9-10, (2008/06/13)
The present invention provides an improved, economical and environmmentally benign process for metal complexes of acetylacetone having the general formula, M(acac)n wherein M is a metal cation selected from the group consisting of Fe, Co, Ni, Cu, Zn, Al, Ca, Mg, Mo, Ru, Re, U, Th, Ce, Na, K, Rb, Cs, V, Cr, and Mn etc., n is an integer which corresponds to the electrovalence of M, are obtained by reacting the corresponding metal hydroxide, metal hydrated oxide or metal oxide with a stoichiometric amount of acetylacetone and separating the product.
