نتایج جستجو برای: aluminum isopropoxide
تعداد نتایج: 51410 فیلتر نتایج به سال:
Composite nanoparticles TiO2&Ag0 were synthesized by coprecipitationin a weakly alkaline medium in the presence of various precursors - metatitanic acid and titanium (IV) isopropoxide. Comparative study included analysis morphology (SEM), phase (XRD) chemical compositions (EDS). The formation anatase structures was confirmed at relatively low concentration silver (0–8 wt% for 0–4 Ti isopropoxid...
Al 2 TiO 5 -based coatings made from aluminium- and titanium-isopropoxide co-deposition using MOCVD, offering reduced temperatures timescales for its synthesis without binary phase formation.
ABSTRACT The coordination polymer [Ti(OiPr)3(OOCCH2CH2CH2C3N2H3)] n was prepared from 4-(imidazol-1-yl)butyric acid and titanium isopropoxide. The structure of the compound is remarkable, as the carboxylate group is coordinated in a chelating manner and no dimerization of the Ti(OiPr)3 groups through OR bridges was observed. GRAPHICAL ABSTRACT
Currently, pressed-wood industries reuse the chemical solution in wood conservation step by using a chlorine solution. However, this procedure is potentially harmful to workers due enormous amount of use. This research will offer more environmental and human health-friendly solutions process. In research, synthesis characterization TTIP-Al films Fe3+/TTIP-Al used photocatalytic oxidation under ...
A highly diastereoselective tandem ring-enlargement and aldol condensation process involving multicomponent reactions of ethereal tricyclooxonium ylide intermediate with alcohols, mono- or dialdehydes in the presence of titanium(iv) isopropoxide is described to furnish alkoxyoctahydro-1,4-benzodioxocin-6(5H)-one ring systems.
Nanofibers, produced by electrospinning a solution containing titanium tetra(IV) isopropoxide, polyvinyl acetate and acetic acid in N,N-dimethyl acetamide, upon sintering at 500 °C produce rice grain-shaped TiO(2) mesostructures. Each rice grain-shaped TiO(2) has a mixed crystal structure and high porosity and the mesostructures are found to have applications in dye-sensitized solar cells.
Divalent metal silylamide complexes of zinc and cobalt and trivalent aluminium isopropoxide were successfully grafted onto large-pore hexagonal channel-like SBA-15 and cubic MCM-48-like periodic mesoporous silica (PMS) KIT-6, to afford hybrid materials Zn[N(SiMe3)2]2@SBA-15, Co[N(SiMe3)2]2(thf)@SBA-15/KIT-6 and {Al(OCHMe2)3}@SBA-15 with well-defined surface species (≡SiO)2M(thf)x, ≡SiOM[N(SiMe3...
The addition of (trimethylsily1)propargylmagnesium bromide (9) to aldehydes afforded predominantly the allenylic alcohols rac-10. The regioselectivity of this addition changes dramatically when organocerium reagents were used for the addition. In this case nearly exclusive formation of the homopropargylic alcohols rac-8 was observed. Highest selectivity for this process was obtained when cerium...
The binuclear centrosymmetric title compound, [Sn(2)(C(3)H(7)O)(6)Cl(2)(C(3)H(8)O)(2)], exhibits an edge-shared double octahedral exhibits an edge-shared octa-hedral structure, which is distorted owing to the presence of asymmetric intra-molecular hydrogen bonds between the axially coordinated isopropanol and isopropoxide ligands. The H atom of the hy-droxy group is located nearer to an isoprop...
An efficient, general procedure for highly chemoselective reductive mono-alkylation of ammonia with ketones is reported. Treatment of ketones with ammonia in ethanol and titanium(IV) isopropoxide, followed by in situ sodium borohydride reduction, and a straightforward workup afforded primary amines in good to excellent yields. Reductive alkylation of ammonia with aldehydes, on the other hand, a...
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