通过在高质子导电性金属有机框架中的离子替代进行质子导电性控制
Masaaki Sadakiyo1, Teppei Yamada, Hiroshi Kitagawa
1Division of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
Journal of the American Chemical Society
|September 9, 2014
概括
在金属有机框架 (MOF) 中,通过将离子换成离子来控制质子导电性. 这种离子替代策略通过在MOF结构内分裂键,成功调节了质子运输.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 层层的金属有机框架 (MOFs) 显示出对质子导电性的潜力.
- 在MOF内部的结网对于高效的质子运输至关重要.
- 控制MOF中的质子导电性对于能源设备中的应用至关重要.
研究的目的:
- 调查阴离子替代在层层MOF中控制质子导电性的作用.
- 为了证明调节键网络用于可调节的质子传输的可行性.
- 建立一种用于微调MOF中的质子导电性的新方法.
主要方法:
- 通过将离子替换为离子的 (NH4) 2 (H2adp) [Zn2 (H2adp) ] (NH4) 2 (H2adp) [Zn2 (H2adp) ] (Zn2 (ox) 3) ·3H2O) 中的离子,合成一个替代的MOF,K2 (H2adp) [Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (H2adp) ][Zn2 (Zn2 (H2adp) ][Zn2 (Zn2 (H2 (H2adp) ][Zn2 (Zn2 (Zn2 (Zn2))
- 结晶结构的表征,以确认在阴离子替代后的结构完整性.
- 测量质子导电性,以评估离子替代对传输性能的影响.
主要成果:
- 在没有显著的晶体结构变化的情况下成功合成了K2 (((H2adp) [Zn2 ((ox) 3) · 3H2O.
- 通过阴离子替代,特别是通过裂解键来证明对质子导电性的控制.
- 证实了二维结网络对于这个MOF的高质子导电性至关重要.
结论:
- 阴离子替代是一种有效的策略,用于控制多层MOF中的质子导电性.
- 通过离子替代裂变的键直接影响质子运输效率.
- 这项研究展示了通过在一个明确的MOF结网络中通过离子替代控制质子导电性的第一个实例.
相关概念视频
02:51Metal-Ligand Bonds
19.2K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
19.2K
02:58Crystal Field Theory - Octahedral Complexes
28.4K
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...
28.4K
01:23Properties of Organometallic Compounds
2.0K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
2.0K
02:42Valence Bond Theory
8.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.8K
00:56Extraction: Advanced Methods
1.2K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.2K
03:45Formation of Complex Ions
18.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
18.8K