晶格设计的H2O-耐受性n型半导体二甲二胺衍生物
Haruka Abe1, Ayumi Kawasaki1, Takashi Takeda1,2
1Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
Journal of the American Chemical Society
|December 30, 2020
概括
离子二 propionate-naphthalenediimide盐具有可逆的水吸附和高离子导电性,Na+和K+盐具有适合水吸附的柔性晶格. 这些材料具有很高的电子流动性,这表明了先进应用的潜力.
科学领域:
- 材料科学
- 超分子化学
- 电化学
背景情况:
- 纳二胺衍生物的电子和结构性质正在被探索中.
- 阴离子盐提供基于阴离子选择的调节性特性.
- 固态材料中的水吸附-脱吸对于各种应用至关重要.
研究的目的:
- 合成和描述具有各种阴离子 (Li +,Na +,K +,Rb +,Cs +) 的二二胺 (PCNDI) 盐.
- 研究这些盐的可逆吸附-脱吸行为和离子导电性.
- 将晶格的灵活性和阴离子大小与水吸附特性和电子流动性相关联.
主要方法:
- 合成2:1的 (M+) 2 ((PCNDI) · ((H2O) n的阴离子盐.
- 温度测量分析以确定吸附水量的数量.
- 导电性测量和X射线衍射以分析晶格的行为.
- 闪光光电解与时间分辨率的微波导电性和过渡吸收光谱,用于电子移动性研究.
主要成果:
- PCNDI盐显示可逆吸附水,Na+和K+盐显示显著的吸附能力 (分别为6.0和4.0).
- Na+和K+盐具有高离子导电性 (10^-410^-5 S cm^-1) 和柔性晶格.
- 在水吸附膜中,电子流动性很高,随着阴离子大小的增加 (Cs+ ≈ Rb+ > K+ > Na+ > Li+).
结论:
- 在Na+和K+PCNDI盐中,静电晶格的灵活性是它们有效吸水的关键.
- 结晶的水分子不会阻碍电子运输, 这表明电子应用的潜力.
- 这些PCNDI盐对于需要控制水吸附和高电子流动性的应用来说是有前途的材料.
更多相关视频
06:35Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
8.3K
12:07Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
Published on: April 1, 2013
17.4K
相关概念视频
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
46.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
46.4K
02:42Ionic Crystal Structures
16.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.2K
02:58Crystal Field Theory - Octahedral Complexes
29.1K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
29.1K
02:37Metallic Solids
20.0K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.0K