...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Polymorphism in Hybrid Organic-Inorganic Bilayered Magnetic Conductors (BEDT-TTF)(3)((FeCl4)-Cl-III)(2), BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene
【24h】

Polymorphism in Hybrid Organic-Inorganic Bilayered Magnetic Conductors (BEDT-TTF)(3)((FeCl4)-Cl-III)(2), BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene

机译：杂化有机-无机双层电磁导体（BEDT-TTF）（3）（（FeCl4）-Cl-III）（2）中的多态性，BEDT-TTF =双（乙烯二硫代）四硫富瓦烯

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two polymorphic hybrid organic-inorganic bilayered magnetic conductors (BEDT-TTF)(3)(FeCl4)(2) (I and II) (BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene) were obtained by the diffusion method. I crystallizes in a monoclinic system with cell parameters: a = 55.9187(7) angstrom, b = 6.7424(1) angstrom, c = 14.9057(3) angstrom, beta = 10 1.056(1)degrees, 5515.5(2) angstrom(3), Z = 4, and C2/c at 290 K, and it transforms to a triclinic system at 220 K: a = 13.4440(2) angstrom, b = 14.6761(2) angstrom, c = 28.1529(5) angstrom, alpha = 100.738(1)degrees, beta = 96.875(1)degrees, gamma = 90.017(1)degrees, V = 5416.8(2) angstrom(3), Z = 4 and P (1) over bar which is stable to 110 K. II crystallizes in a triclinic system with cell parameters: a = 6.7396(3) angstrom, b = 9.9640(5) angstrom, c = 21.132(1) angstrom, alpha = 79.536(2)degrees, beta = 81.032(2)degrees, gamma = 81.066(3)degrees, V = 1367.3(1) angstrom(3), Z = 1, and P (1) over bar 290 K. They both contain two donor layers having formal charge of BEDT-TTF+0.5 in layer-A and BEDT-TTF+1.0 in layer-B. The donor arrangements in layer-A are delta-type in I and beta'-type in II, while the donor arrangements in layer-B and anion arrangements in I and II are also different. Layer-A is separated from layer-B by FeCl4-. The energy band calculation indicates a Peierls-like metal-insulator transition in the transverse direction at 220 K in I (sigma(300K) = 120 S.cm(-1)), and a Mott insulating state in II (sigma(300K) = 10(-2) S.cm(-1) and E-alpha = 0.2 eV). The presence of pi-d interactions between donors and anions results in the magnetic anomalies observed at 4.8 K in I and 2.7 K in II.
机译：通过扩散法获得了两个多态杂化有机-无机双层磁导体（BEDT-TTF）（3）（FeCl4）（2）（I和II）（BEDT-TTF =双（亚乙基二硫代）四硫富瓦烯）。我在具有细胞参数的单斜晶系系统中结晶：a = 55.9187（7）埃，b = 6.7424（1）埃，c = 14.9057（3）埃，beta = 10 1.056（1）度，5515.5（2）埃（3 ），Z = 4，C2 / c在290 K时转换为三斜晶系：a = 13.4440（2）埃，b = 14.6761（2）埃，c = 28.1529（5）埃= 100.738（1）度，beta = 96.875（1）度，γ= 90.017（1）度，V = 5416.8（2）埃（3），Z = 4和P（1）在稳定至110 K的条上。II在具有细胞参数的三斜晶系​​系统中结晶：a = 6.7396（3）埃，b = 9.9640（5）埃，c = 21.132（1）埃，alpha = 79.536（2）度，beta = 81.032（2）度，在bar 290 K上的gamma = 81.066（3）度，V = 1367.3（1）埃（3），Z = 1和P（1）。它们都包含两个施主层，其正式电荷为BEDT-TTF + 0.5 in B层中的A层和BEDT-TTF + 1.0。 A层中的供体排列在I中为δ型，II中为β'型，而B层中的供体排列与I和II中的阴离子排列也不同。 A层通过FeCl4与B层分开。能带计算表明在I（sigma（300K）= 120 S.cm（-1））下在220 K处横向出现Peierls样的金属绝缘体转变，在II（sigma（300K））下出现莫特绝缘态= 10（-2）S.cm（-1）和E-alpha = 0.2 eV）。供体和阴离子之间存在pi-d相互作用，导致在I中4.8 K和II中2.7 K观察到磁异常。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号