基结合 (NH4+/NH2NH3+) 的超分子阴离子组合在[Ni(dmit) 2基的分子导体和磁铁中
Tomoyuki Akutagawa1, Tatsuo Hasegawa, Takayoshi Nakamura
1Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan. takuta@imd.es.hokudai.ac.jp
Journal of the American Chemical Society
|July 26, 2002
概括
这项研究探讨了使用氨 (NH4+) 和 (NH2-NH3+) 的新型与气结合的超分子阴离子组合,并将皇冠乙烯纳入导电 bis (((dithiolene) ([Ni (((dmit) 2)) 盐中. 这些组件表现出独特的结构和半导体特性,其中一个显示铁磁相互作用.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 导电金属狄醇烯复合物,如二狄醇烯 ([Ni(dmit) 2),以其多样化的电子特性而闻名.
- 超分子组件通过非共价相互作用 (如键) 提供可调节的结构和功能.
- 皇冠乙烯是多功能宏循环,能够与各种子形成复合体,影响晶体包装和特性.
研究的目的:
- 合成和表征 (NH4+) 和 (NH2-NH3+) 的新型联超分子阴子组合,具有不同的皇冠 ([12]皇冠-4, [15]皇冠-5, [18]皇冠-6).
- 将这些组件纳入导电的[Ni(dmit) 2盐中,并研究它们的结构和电子特性.
- 探索阴阳-皇冠以太相互作用对产生的晶体结构和导电性的影响.
主要方法:
- 合成涉及氨/和皇冠的超分子阴离子组合.
- 这些组合的纳入[Ni(dmit) 2盐.
- 单晶X射线衍射以确定晶体结构和超分子排列.
- 测量电导率以评估半导体特性.
- 在组件内对结相互作用 (N-H···O) 的分析.
主要成果:
- 形成金字塔和离子通道结构与冠以太组合,表现出非静态电离子占用和静态障碍,导致局部导电电子.
- 首次识别出具有三明治和俱乐部三明治结构的固态基冠以太组件.
- 在 (NH2-NH3+) 2中检测铁磁相互作用 (韦斯温度=+1K) 于 (NH2-NH3+) 2中[15]皇冠-5) 3[Ni(dmit) 26.
- 在 (NH2-NH3+) 0.8([18]皇冠-6) [Ni(dmit) ]2和 (NH4+) 0.76([18]皇冠-6) [Ni(dmit) ]2晶体之间的同态性,表明[18]皇冠-6.6的结构适应性.
结论:
- 和水的和水与皇冠乙烯的原子组合可以有效地纳入[Ni(dmit) 2盐中,产生多样化的晶体结构.
- 皇冠乙烯的尺寸和灵活性,以及阴离子-皇冠乙烯的相互作用,显著影响了产生的材料的包装,固态度和电子性质.
- 这些新型组件代表了开发具有可调节电子和磁性特性的新功能材料的有希望的平台.
相关概念视频
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