yttrium orthoferrite

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属有机体
• 英文名称: yttrium orthoferrite
• 英文别名: iron;yttrium;trihydrate
• 化学式: FeO₃Y
• 分子量: 192.751
• InChiKey: IZLDGXYKWUDOAS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.48
• 重原子数：
  5
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  3
• 氢给体数：
  3
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  yttrium orthoferrite 以 neat (no solvent) 为溶剂， 反应 2.0h， 生成 yttrium iron garnet
  参考文献：
  名称：

  掺铈YIG的晶体结构和磁性能：掺杂浓度和退火温度的影响

  摘要：

  摘要 我们研究了 Y 3+ 被 Ce 3+ 取代对掺铈钇铁石榴石 (YIG)、Ce x Y 3- x Fe 5 O 12 (0 ≤ x ≤ 0.5)，这是使用高能球磨合成的。特别是，我们旨在研究铈浓度和退火温度对 Ce 掺杂的 YIG 晶体结构和磁性能的影响。Fe 2 O 3 、Y 2 O 3 和Ce 2 (CO 3 ) 3 以化学计量比混合，研磨5小时，并在1000至1400℃的不同温度下退火。X 射线衍射图证实，在所有研究的温度和组成下，CeO 2 作为第二相的存在，以及 YIG 结构的形成。对于在 1400 °C 下退火的样品，Ce 3+ 在石榴石结构中完全固溶。增加Ce 3+ 含量导致饱和磁化强度持续降低和矫顽力略微降低，这是由于Ce 3+ 插入YIG 结构和CeO 2 作为第二相的存在所致。

  DOI：

  10.1016/j.jallcom.2017.09.304
• 作为产物：
  描述：

  [YFe(isopropoxide)6(isopropanol)] 以 neat (no solvent) 为溶剂， 生成 yttrium orthoferrite
  参考文献：
  名称：

  Numerical simulation of magnetic interactions in polycrystalline YFeO3

  摘要：

  The magnetic behavior of polycrystalline yttrium orthoferrite was studied from the experimental and theoretical points of view. Magnetization measurements up to 170 kOe were carried out on a single-phase YFeO3 sample synthesized from heterobimetallic alkoxides. The complex interplay between weak-ferromagnetic and antiferromagnetic interactions, observed in the experimental M(H) curves, was successfully simulated by locally minimizing the magnetic energy of two interacting Fe sublattices. The resulting values of exchange field (H-E = 5590 kOe), anisotropy field (H-A = 0.5 kOe) and Dzyaloshinsky-Moriya antisymmetric field (H-D = 149 kOe) are in good agreement with previous reports on this system. (C) 2007 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jmmm.2007.07.024
• 作为试剂：
  描述：

  氨 在 yttrium orthoferrite 作用下， 以 further solvent(s) 为溶剂， 生成 氮 、 氧化亚氮
  参考文献：
  名称：

  Zakharchenko, Russian Journal of Physical Chemistry, 2002, vol. 76, # 7, p. 1088 - 1094

  摘要：

  DOI：

文献信息

• Bifunctional YFeO3-Based Catalysts Used in the Selective Catalytic Reduction of Nitrogen Monoxide in the Presence of Excess Oxygen
  作者：J Lentmaier、S Kemmler-Sack

  DOI：10.1016/s0025-5408(97)00236-5

  日期：1998.3

  The catalytic activity of YFeO3-based catalysts in the lean-NOx process was studied for the sulfated perovskite YFeO3, composites between YFeO3 and the solid acid ZrO2, as well as sulfated composites YFeO3/ZrO2. Moreover, a mechanical mixture between YFeO3 and sulfated tetragonal zirconia (t-ZrO2/SO4) was studied. It is shown that the lean-NOx activity of YFeO3 is improved by forming the composites

  研究了 YFeO3 基催化剂在贫 NOx 工艺中对硫酸化钙钛矿 YFeO3、YFeO3 与固体酸 ZrO2 的复合物以及硫酸化复合物 YFeO3/ZrO2 的催化活性。此外，研究了 YFeO3 和硫酸化四方氧化锆 (t-ZrO2/SO4) 之间的机械混合物。结果表明，通过形成复合材料 YFeO3/ZrO2 以及硫酸化样品可以提高 YFeO3 的贫 NOx 活性，在约 400°C 时，NOx 转化为 N2 的最高转化率约为 30%。这些材料的缺点是活性随着原料气中氧含量的增加而降低。然而，YFeO3 和 t-ZrO2/SO4 之间的机械混合物不仅在约 400°C 下显示出改进的高温活性，而且在低温（<300-350°C）下也显示出明显的活性。后者明显随着氧含量的增加而增加，而前者减少。氧气的相反作用可以用不同的反应机制来解释。
• Selective reduction of nitrogen monoxide by catalysts based on composites between solid acid and perovskite in the presence of excess oxygen
  作者：J. Lentmaier、S. Kemmler-Sack、G. Knell、P. Kessler、E. Plies

  DOI：10.1016/0025-5408(96)00119-5

  日期：1996.10

  acid property of solid acids on the selective reduction of nitrogen monoxide by catalyst composites from perovskite and solid acid materials was examined for the case of excess of oxygen by using the perovskite YFeOsub 3} and the solid acids TiOsub 2} and ZrOsub 2}. For comparison cordierite was likewise employed as support material. It is shown that the catalytic activity of the composite strongly

  在氧过量的情况下，通过使用钙钛矿 YFeOsub 3} 和固体酸 TiOsub，研究了固体酸的酸性质对钙钛矿和固体酸材料的催化剂复合物选择性还原一氧化氮的影响2} 和 ZrOsub 2}。为了比较，堇青石同样用作载体材料。结果表明，复合材料的催化活性强烈依赖于固体酸的酸性：酸性越强的材料催化活性越高。对于复合材料 YFeOsub 3}/ZrOsub 2}，SCR 活性在 250 C 左右开始。值得注意的是，NO 的转化对 Nsub 2} 是完全选择性的，并且不产生一氧化二氮。贵金属 Pt 和 Ag 的浸渍对 SCR 活性没有影响。
• Features of Synthesis and Magnetic Characteristics of Yttrium Orthoferrite Produced by Gel Combustion
  作者：V. A. Ketsko、M. N. Smirnova、M. A. Kop’eva、G. E. Nikiforova、A. A. Geras’kin、K. I. Yanushkevich

  DOI：10.1134/s0036023620090065

  日期：2020.9

  organic fuel on the combustion mode, features of combustion, and the phase composition of the end product of the synthesis of yttrium orthoferrite was studied. It was shown that the production of YFeO3 requires a fuel that favors the formation of a single polymer metal-containing complex determining the gel structure and ensures the combustion in an intense self-sustaining mode. Yttrium orthoferrite was

  摘要 研究了有机燃料对钇正铁酸钇合成的燃烧方式，燃烧特性和最终产物的相组成的影响。结果表明，YFeO 3的生产需要一种燃料，该燃料有利于形成确定凝胶结构的单一含金属聚合物配合物，并确保强烈的自我维持模式下的燃烧。用柠檬酸和硝酸铵的混合物作为燃料，通过凝胶燃烧合成原酸钇。发现斜方晶（空间群Pnma）钇正铁氧体的晶胞参数为a = 5.594（2）Å，b  = 7.604（3）Å，c = 5.282（1）Å，V = 224.7（3）Å3。研究了YFeO 3比磁化强度在80-800 K范围内的温度依赖性。测定磁相变磁顺序磁性病症的温度为Ť Ç〜620 K.
• Rapid microwave-assisted sol–gel preparation of Pd-substituted LnFeO₃(Ln = Y, La): phase formation and catalytic activity
  作者：Lauren M. Misch、Alexander Birkel、C. Adrian Figg、Brett P. Fors、Craig J. Hawker、Galen D. Stucky、Ram Seshadri

  DOI：10.1039/c3dt52404c

  日期：——

  We present a rapid microwave-assisted sol–gel approach to Pd-substituted LnFeO3 (Ln = Y, La) for applications in C–C coupling reactions. These materials could be prepared in household microwave ovens in less than 15 minutes of reaction time with the final materials displaying well-defined structure and morphology. Phase evolution was studied using time-dependent microwave heatings and then compared with the results obtained from thermogravimetric analyses. Materials were confirmed to be phase pure by laboratory and synchrotron X-ray diffraction. Substituted Pd is ionic as shown by the binding energy shift from X-ray photoelectron spectroscopy. The short heating periods required for phase purity allow these materials less time for sintering as compared to conventional solid state preparation methods, making relatively high surface areas achievable. These materials have been successfully used as catalyst precursor materials for C–C coupling reactions in which the active species is Pd0. Pd-substituted LnFeO3 (Ln = Y, La) provides Pd0 in solution which can be complexed by the ligand SPhos, allowing for aryl chloride coupling.

  我们提出了一种快速微波辅助溶胶-凝胶方法，用于制备Pd掺杂的LnFeO3（Ln = Y, La），以应用于C–C耦合反应。这些材料可以在家用微波炉中在不到15分钟的反应时间内制备，最终材料显示出良好的结构和形态。我们使用时间依赖的微波加热研究了相的演变，并将其与热重分析的结果进行了比较。通过实验室和同步辐射X射线衍射确认了材料的相纯度。掺杂的Pd表现为离子态，X射线光电子能谱显示其结合能发生了位移。所需的短加热时间使得这些材料的相纯度得以实现，相较于传统的固态制备方法，烧结时间较短，从而使得相对较高的比表面积成为可能。这些材料成功用作C–C耦合反应的催化前驱体，其中活性物质为Pd0。Pd掺杂的LnFeO3（Ln = Y, La）为溶液提供了Pd0，可以与配体SPhos结合，从而实现芳基氯化物的耦合反应。
• Pt nanoparticles supported on YCo_xFe_1−xO₃ perovskite oxides: highly efficient catalysts for liquid-phase hydrogenation of cinnamaldehyde
  作者：Yujie Xue、Huiyue Xin、Wenhui Xie、Peng Wu、Xiaohong Li

  DOI：10.1039/c9cc00318e

  日期：——

  were prepared using a modified sol–gel method with SBA-15 as a hard template. Pt nanoparticles supported on YCo0.3Fe0.7O3 perovskite oxides can furnish as high as 94.9% selectivity to cinnamyl alcohol at nearly full conversion, with the initial activity (TOF) reaching 15 163 h−1 for the selective hydrogenation of cinnamaldehyde.

  YCo X Fe 1- X O 3钙钛矿氧化物是使用改良的溶胶-凝胶法以SBA-15作为硬模板制备的。负载在YCo 0.3 Fe 0.7 O 3钙钛矿氧化物上的Pt纳米颗粒在几乎完全转化时可提供高达94.9％的对肉桂醇的选择性，对肉桂醛进行选择性氢化的初始活性（TOF）达到15 163 h -1。