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Synthesis and Characterization of Trivalent Al Substituted Zinc Ferrite using ethylene diamine (EDA) as Ligand

Non-Metallic Material Science 2020年第2期2卷 8-14页

作者： Soumya Mukherjee Department of Metallurgical Engineering Kazi NazrulUniversityPO Kalla MoreAsansol713340India

Nano domain Al substituted Zinc ferrite was prepared by chemical route using ethylene diamine as ligand.High purity precursors nitrate salts of Zinc,Fe(3+),Al(3+)were utilized along with citric acid which acts as both fuel and complexing agent.Two different molar ratios of Zn(2+):(Fe3+):Al(3+)is 1:1.5:0.5 and 1:1.25:0.75.After ensuring proper mix of the solution ethylene diamine was added dropwise to form a gel like mass with proper pH control.Before annealing,thermal analysis was carried to determine the crystallization/phase transition zone.Drying was carried in several stages.Initially,gel like mass was obtained after drying at 40°C while pH was about 7.Drying of gel was carried in oil bath at about 90°C and powdered mass obtained was grinded followed by auto combustion at 150°C for 60 minutes before annealing at 150°C,350°C,650°C,950°C for 2 hours to ensure the phase formation.Crystallite size,lattice strain and lattice parameters were studied from XRD analysis.

关键词： Al substituted Zinc ferrite ethylene diamine Thermal analysis Phase analysis Strain analysis

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Facile Synthesis of Dendritic Hydroxyl-terminated Cyanuric Chloride Derivatives and Their Properties

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Chinese Journal of Chemistry 2012年第7期30卷 1485-1489页

作者：林休休周建华徐冬梅 College of Chemistry Chemical Engineering and Materials ScienceNational Engineering Laboratory for Modern SilkKey Laboratory of Organic Synthesis of Jiangsu ProvinceJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSoochow UniversitySuzhouJiangsu 215123China (Suzhou)Zhongke Nanotech Coating Co.LTD SuzhouJiangsu 215024China

Novel dendritic compounds G1.5（OH）4 and G1.5（OH）8 with peripheral hydroxyl were synthesized under mild conditions from eyanuric chloride, ethylene diamine, ethanolamine and diethanolamine. The products could be separated and purified through dispersion and precipitation in organic solvents with good yields （over 93.0%） and high purity （above 98.0%, HPLC）. The structures of the products were characterized by 1R, MS, 1H NMR and elementary analysis. G1.5（OH）4 and Gl.5（OH）8 could be dissolved in polar solvents such as methanol, water and dimethylsulfoxide. TGA analysis showed that G1.5（OH）4 and G1.5（OH）8 had good thermo stability. The aqueous solutions ofG1.5（OH）4 and G1.5（OH）8 exhibited low surface tension.

关键词： dendritic cyanuric chloride ethylene diamine hydroxyl surface activity

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