高铁酸盐的电合成及其作为电极材料的电化学性质研究进展

综述了近几年来在高铁酸盐电合成及其作为电池材料的电化学性质研究方面的进展，介绍了各类不同的铁阳极在碱性电解质溶液中电解氧化为高铁酸盐的电流效率，并对在直流电上叠加正弦式交流电的电化学过程进行了讨论。高铁酸盐作为电池的阴极材料能形成高性能的超级铁电池。参考文献32篇。     

三（2,4,6—三溴苯氧基）锑酸酯的合成及其阻燃性能与阻燃机理

合成了三（２，４，６－三溴苯氧基）锑酸酯，通过元素分析和ＩＲ光谱予以表征，并就其对聚乙烯和聚丙烯的阻燃性能与阻燃机理进行了研究。结果表明：这种分子中同时含有溴、锑的阻燃剂，比相应的仅含溴和仅含锑的阻燃剂混合物具有更高的阻燃性能。     

三芥子酸甘油酯类似物的合成及抑菌活性

以N-(2-溴乙基)邻苯二甲酰亚胺或N-(4-溴丁基)邻苯二甲酰亚胺和硫氢化钠为起始原料,通过取代、肼解、亲核加成等反应合成了10个三芥子酸甘油酯(erucin)类似物,通过核磁共振氢谱、碳谱及质谱对其结构进行了确认。采用比浊法初步测试了其对大肠杆菌、金黄色葡萄球菌、白色葡萄球菌、藤黄八叠球菌、枯草芽孢杆菌、蜡状芽孢杆菌和四联球菌等7种菌的生长抑制活性,测试结果显示,化合物对测试菌种都表现出较好的生长抑制活性,其中苄硫乙基-1-硫代异硫氰酸酯(5e)和苄硫基丁基-1-硫代异硫氰酸酯(5j)活性最高,对大肠杆菌的最低生长抑制浓度仅为7.8μg/m L,对金黄色葡萄球菌的最低生长抑制浓度也仅为15.6μg/m L和31.2μg/m L。     

铁酸钴纳米晶的低温合成、谱学表征及磁性

以十六烷基三甲基溴化铵（CTAB）为模板,Fe(NO3)3·9H2O和Co(NO3)2·6H2O为前躯体,NaOH为沉淀剂,低温回流合成了磁性铁酸钴纳米晶。利用X射线衍射、透射电子显微镜、红外光谱、拉曼光谱等测试技术对产品的结构进行了表征,借助振动样品磁强计测定了样品的室温磁性能。结果表明,铁酸钴纳米晶为单相立方尖晶石结构,纳米晶的平均粒径为15-20 nm。铁酸钴纳米晶在室温外加磁场下表现出明显的磁滞现象,饱和比磁化强度MS=36.5 A.m2/kg,矫顽力HC=5.89×104 A/m。     

含三芳胺基的单环金属铂配合物的合成及其光物理与电化学性质

通过Ullmann反应和环金属化反应合成了两种新型含三芳胺基的单环金属铂配合物: [N,N-二(4-叔丁基苯基)-4-(2'-吡啶基)苯胺-C3, N1](二苯甲酰基甲烷)合铂(Ⅱ)[(BuPhNPPy)Pt(DBM)]和[N,N-二苯基-4-(2'-吡啶基)苯胺-C3, N1](二苯甲酰基甲烷)合铂(Ⅱ) [(PhNPPy)Pt(DBM)], 探讨了分子结构和反应条件对合成反应的影响, 环金属化反应的产率达到87.0%. 研究了单环铂配合物的紫外-可见光谱、光致发光和电化学性质. 研究结果表明, (PhNPPy)Pt(DBM)和(BuPhNPPy)Pt(DBM)的氧化-还原电位分别为0.80, -1.63 V和0.93, -1.45 V; 它们都具有很强的紫外吸收和光致发光性能, 其中(PhNPPy)Pt(DBM)的最大紫外吸收峰为346 nm, 最大荧光波长为537 nm, (BuPhNPPy) Pt(DBM)的最大紫外吸收和荧光波长相应红移7~13 nm.     

2-吡嗪羧酸银的合成、晶体结构及热化学性质

以二次蒸馏水为溶剂,合成了2-吡嗪羧酸银(Ag(pyza)(s)),并利用X-射线单晶衍射法表征了其晶体结构.根据晶体结构数据计算得到2-吡嗪羧酸银的晶格能为554.10 kJ/mol.利用TG/DSC热分析技术研究了该化合物的热分解过程;用精密自动绝热热量计测量了其在78~378 K温区的低温热容;通过最小二乘法拟合得到了摩尔热容随折合温度变化的多项式方程,利用此方程计算出该化合物的舒平热容和各种热力学函数.通过设计合理的热化学循环,利用等温环境溶解-反应热量计分别测定了所设计热化学反应的反应物和产物在选定溶剂中的溶解焓,通过计算得到反应的反应焓为:?(31.919±0.526)kJ/mol.利用Hess定律计算出2-吡嗪羧酸银的标准摩尔生成焓为:?(243.659±1.298)kJ/mol.利用紫外-可见光谱仪对反应物和产物溶解所得溶液分别进行测量,从而证实了所设计热化学循环的可靠性.     

含扑酸的三烃基锡配合物的合成及结构研究

用扑酸(H₂pa,2,3-diphenylpropionicacid)和三烃基锡氯化物R₃SnCl(R=Ph,Bu,Me)合成了3个有机锡配合物{[(Ph₃Sn)(pa)]·Et₃N}_n(1)、(Bu₃Sn)₂(pa)(2)和[(Me₃Sn)₂(pa)]·CH₂Cl₂(3)。通过元素分析、红外光谱、核磁共振谱及X-ray单晶衍射等手段对配合物进行了表征。结构表明三苯基锡扑酸酯为一维链状聚合物,扑酸作为桥联配体链接各个锡原子,中心锡采取五配位的三角双锥构型;而三甲基锡和三丁基锡扑酸酯配合物为二核锡配合物,锡采取四配位的四面体构型。     

二癸基次膦酸的合成及其萃取性能

以廉价的工业副产物混合癸烯和次膦酸钠反应,在常压下合成了二癸基次膦酸,分离产率达99.8%,产物纯度98%.萃取实验表明,二癸基次膦酸对镍/钴分离的选择性要好于Cyanex272,对镍和钴的萃取率和反萃率均大于96%;同时,对钴等金属离子,可实现对低pH浸出液的直接萃取.     

聚甲氧基二甲醚的合成及其物理化学性质表征

聚甲氧基二甲醚（H₃CO（CH₂O）_nCH₃, PODE_n或DMM_n, n ≥ 2）具有独特的物理化学性质;作为一种柴油添加剂,可以有效提高油品燃烧效率并达到节能减排的目的。首先合成了一系列聚合度n为2、3、4和5单一组分的聚甲氧基二甲醚,采用NMR、FT-IR、Raman和DFT计算等手段对每个聚甲氧基二甲醚单体的化学结构进行表征,并对其在298.15-323.15K温度的密度和黏度进行了测试。结果表明,聚甲氧基二甲醚的密度和黏度随着温度的升高而逐渐降低,随着聚合度的增加而逐渐升高。同时,聚甲氧基二甲醚PODE_n（n =2-5）的闪点和倾点以及溶解热和凝固热均随着聚合度的增加而提高。     

含扑酸的三烃基锡配合物的合成及结构研究(英文)

用扑酸(H2pa,2,3-diphenylpropionic acid)和三烃基锡氯化物R3SnCl(R=Ph,Bu,Me)合成了3个有机锡配合物{[(Ph3Sn)(pa)]·Et3N}n(1)、(Bu3Sn)2(pa)(2)和[(Me3Sn)2(pa)]·CH2Cl2(3)。通过元素分析、红外光谱、核磁共振谱及X-ray单晶衍射等手段对配合物进行了表征。结构表明三苯基锡扑酸酯为一维链状聚合物,扑酸作为桥联配体链接各个锡原子,中心锡采取五配位的三角双锥构型;而三甲基锡和三丁基锡扑酸酯配合物为二核锡配合物,锡采取四配位的四面体构型。     

高铁酸盐电化学合成的研究

采用电化学阳极氧化法制备高铁酸盐,研究制备条件对电解产率的影响.结果表明,灰口铸铁是较为理想的阳极材料.在以14mol·dm-3NaOH作电解液、20℃和电流密度4.54mA·cm-2条件下电解1h,得最高电流效率为68.5%,优于使用KOH作电解液.     

溶液中Fe(VI)向Fe(IV)转化反应的分光光度法跟踪

Different concentrations of ferrate(VI) with ClO^- and without ClO^- in alkaline solution were traced by visible spectrometry, and the conversion reaction of Fe(VI) to Fe(IV) was found to exist, in condition that c was ≥ 6 mol·L^-1. ClO^- would slow down the decomposition reaction rate of Ferrate(VI) and increase the product concentration of Fe(IV) in the system.     

Synthesis and characterization of oxodiperoxo complexes of tungsten(VI) with some Mannich base ligands

Six oxodiperoxotungsten(VI) complexes, [WO(O₂)₂L–L] (where L–L?=?morpholinobenzyl benzamide (MBB), piperidinobenzyl benzamide (PBB), piperidinobenzyl urea (PBU), morpholinobenzyl urea (MBU), piperidinobenzyl thiourea (PBTU) and morpholinobenzyl thiourea (MBTU)) have been prepared by stirring WO₃?·?H₂O with excess 30% aqueous (w/v) H₂O₂ and then treating with an ethanolic solution of the Mannich base ligand (L–L). These have been characterized by elemental analysis, conductance and magnetic susceptibility measurements, IR spectra, electronic spectra, ¹H NMR, TGA/DTA and cyclic voltammetric studies. These complexes are non-electrolytes and diamagnetic in nature. The ligands are bound to metal in a bidentate mode through carbonyl oxygen/thiocarbonyl sulphur and the ring nitrogen. The complexes also inhibit the growth of pathogen “Fusarium Spp.” up to 60%. The cyclic voltammograms of the complexes indicate quasi-reversible redox steps involving complexes.     

SA-APAM 膜的制备及其在电生成高铁酸盐中的应用

SA-APAM 膜的制备及其在电生成高铁酸盐中的应用;海藻酸钠(SA);阴离子聚丙烯酰胺(APAM);交联;电生成高铁酸盐     

Synthesis, Spectroscopic Properties and Structural Characterization of Sodium Potassium Citrato Oxotungstate(VI) Dimer

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On the Origins of Some Spectroscopic Properties of “Purple Iron” (the Tetraoxoferrate(VI) Ion) and Its Pourbaix Safe-Space

In this work, the authors attempt to interpret the visible, infrared and Raman spectra of ferrate(VI) by means of theoretical physical-inorganic chemistry and historical highlights in this field of interest. In addition, the sacrificial decomposition of ferrate(VI) during water treatment will also be discussed together with a brief mention of how Rayleigh scattering caused by the decomposition of Fe^VIO₄²⁻ may render absorbance readings erroneous. This work is not a compendium of all the instrumental methods of analysis which have been deployed to identify ferrate(VI) or to study its plethora of reactions, but mention will be made of the relevant techniques (e.g., Mössbauer Spectroscopy amongst others) which support and advance this overall discourse at appropriate junctures, without undue elaboration on the foundational physics of these techniques.     

Thermal Analysis of Magnesium Tris(maleato) Ferrate(III) Dodecahydrate. Physico-chemical studies

Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate has been studied from ambient to 700°C in static air atmosphere employing TG, DTG, DTA, XRD, Mössbauer and infrared spectroscopic techniques. The precursor decomposes to iron(II) intermediate species along with magnesium maleate at 248°C. The iron(II) species then undergo oxidative decomposition to give α-Fe₂O₃ at 400°C. At higher temperatures magnesium maleate decomposes directly to magnesium oxide, MgO, which undergoes a solid state reaction with α-Fe₂O₃ to yield magnesium ferrite (MgFe₂O₄) at 600°C, a temperature much lower than for ceramic method. The results have been compared with those of the oxalate precursor.     

Studies on the influence of various experimental conditions on electrochemical generation of ferrate(VI) in NaOH-KOH mixed electrolyte

Ferrate(VI) was prepared by electrooxidation in diaphragm electrolyzer with iron wire gauze as anode and NaOH-KOH mixed solution as electrolyte. The influences of various experimental conditions, such as the volume ratio of NaOH-KOH mixed electrolyte, temperature, current density, passivation of iron anode were investigated on ferrate current efficiency. Due to the low solubility of K₂FeO₄ in concentrated alkaline solution and the passivation of iron wire gauze anode, a highest current efficiency over 90% was obtained at 45°C and at a current density of 5 mA cm⁻² in mixed electrolyte with the volume ratio of NaOH: KOH equal to 6: 4. The result is superior to using NaOH and KOH as electrolyte respectively. In addition, polarization curves, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) were employed to further study the effects of synthesis conditions on ferrate(VI) in theory. Published in Russian in Elektrokhimiya, 2009, Vol. 45, No. 7, pp. 853–857. The article is published in the original.     

三草酸合铁(Ⅲ)酸钾合成方法的改进

三草酸合铁(III)酸钾具有工业生产价值,其合成作为化学专业本科生的经典实验项目,按教材实验的效果却不尽人意。本文在严谨的化学平衡理论分析基础上,首次提出提高合成产率的关键是严格控制草酸和草酸钾的用量,改进后的合成条件为：氧化步骤H2O2的浓度为6%,水浴温度为40°C;充分氧化后,微沸2分钟;酸溶步骤中草酸稍微过量,草酸钾过量10%;结晶时做到充分冷却。经此改进,可简化操作,节约原料,实验室平均产率达87%,教学中学生实验平均产率超过70%。     

Natriumoxonitridometallate(VI) von Molybdän und Wolfram,Na4MO2N2 (M = Mo,W)

Sodium Oxonitridometallates(VI) of Molybdenum and Tungsten, Na₄MO₂N₂ (M = Mo, W) MoO₃ as well as WO₃ react with an excess of NaNH₂ in autoclaves at temperatures ranging from 250°C to 750°C to yield – in contrast to Ta₂O₅ [1] – oxonitridometallates of general composition Na₄MX₄ and other products like Na₅WO₄N [2]. The compounds decompose in moist air within minutes to Na₂WO₄, Na₂MoO₄ and Na₂MoO₄ · xH₂O, respectively. The structures of the Na₄MX₄ phases were determined from single crystal X-ray diffraction data. They crystallize triclinic in the Na₄CoO₄-type structure [3] P1 , Z = 2 with the following cell constants: