555-31-7Relevant articles and documents
On the interaction of tetraethoxosilane with metal alkoxides: Sol-gel synthesis of alkaline-earth metal silicates
Suslova,Turova
, p. 1846 - 1854 (2006)
Physicochemical analyses (solubility method, conductometry, and IR spectroscopy) revealed no complex formation in M(OR)n-Si(OR) 4-ROH systems (M = Na, Ba, Al; R = Et, Pri), unlike in the systems containing alkoxides of two
The state of Al(III) in alcohol solutions of aluminum alkoxide as probed by 27Al and 13C NMR and small-angle X-ray scattering
Fedotov,Molchanov,Zotov,Tuzikov
, p. 1621 - 1627 (2008)
Solutions of aluminum alkoxides obtained by interaction of aluminum metal with methyl, ethyl, and isopropyl alcohols were studied by 27Al and 13C NMR and small-angle X-ray scattering. Alkoxides with a tetrahedral environment of aluminum prevail in methanol solutions, and those with an octahedral environment of aluminum predominate in ethanol solutions. In isopropyl alcohol at 293 K, polynuclear alkoxides with tetrahedral, octahedral, and pentacoordinated aluminum environments coexist. The structure of polynuclear complexes was refined by comparison of their calculated dimensions with small-angle X-ray scattering data.
A Co-Precipitated α-Alumina (Al2O3) used as a TL-Micro Dosimeter
Said, Fouad,Tantawy, Hesham,El-Faramawy, Nabil,Abdel-Rahman, Mohamed A. E.
, p. 1354 - 1362 (2021)
This study describes the preparation method of alumina (Al2O3) as a type of thermoluminescence dosimeter (TLD) to monitor gamma photons (γ-rays) in abroad band of radioactive doses (0.5 : 2000 Gy). Alumina is selected in this study because it has a relatively low cost TL material and can be easily prepared. Aluminum oxide (Al2O3) was chemically prepared using two different methods which are the Sol-Gel and Co-precipitation methods. For each method, the produced alumina (Al2O3) was divided into 4 groups which was thermally treated at (400, 600, 800, 1100 °C) respectively for 6 hours for each group. The crystalline features, morphology and sample composition of the prepared samples were chemically characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX). Al2O3 prepared by the Co-precipitation method which was treated at 1100 °C (P4) was found to exhibit the highest gamma ray response compared to other samples. The deconvolution analysis showed that the main TL glow curve consisted of (5) overlapped peaks corresponding to number of traps. The linearity of the gamma response for this sample appeared in doses ranging from 1 Gy up to 200 Gy. The minimum detectable dose that can be detected by precipitated-alumina sample (P1) was calculated mathematically to be 3.653 mGy. The fading was found to be 45.6 % after being stored for 45 days at room temperature and approximately 65 % after 90 days. This sample was reproducible according to the repeated TL results for the same sample for 5 times as their values were very close from one other with standard deviation (±σ) 0.96 %. Henceforth, Co-precipitated α-alumina can be used as a TL-Micro dosimeter.
Method for removing iron impurities in alkoxy aluminum
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Paragraph 0035-0037, (2020/05/30)
The invention relates to a method for removing iron impurities in alkoxy aluminum. The method comprises the steps that a reducing agent and magnet powder are added into an alcoholic solution of alkoxyaluminum, a full reaction is performed, and a reaction product is filtered to remove solids so as to obtain the alcoholic solution of iron-impurity-removed alkoxy aluminum, wherein the reducing agentis one or a plurality of materials selected from elemental aluminum, hydroxylamine hydrochloride and ascorbic acid. The method is simple to operate, easy to industrialize and capable of effectively removing iron impurities to obtain high-purity alkoxy aluminum.
Advanced palladium free approach to the synthesis of substituted alkene oxindoles: Via aluminum-promoted Knoevenagel reaction
Novikova, Daria S.,Grigoreva, Tatyana A.,Zolotarev, Andrey A.,Garabadzhiu, Alexander V.,Tribulovich, Vyacheslav G.
, p. 34543 - 34551 (2018/10/24)
A synthetic route for the synthesis of C24, as well as for the design of focused libraries of direct AMPK activators was developed based on a convergent strategy. The proposed scheme corresponds to the current trends in C-H bond functionalization. The use of aluminum isopropoxide for the Knoevenagel condensation of oxindole with benzophenones is a noticeable point of this work.