通过光诱导协调聚合物形成和热逆转控制有机金属离子液体中的离子导电性
Tomoyuki Mochida1,2, Masato Shimada1, Ryota Inoue1
1Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.
The journal of physical chemistry. B
|June 11, 2024
概括
研究人员开发了具有可调节导电性的有机金属离子液体 (IL). 这些IL可以通过光和热在导电液体和不太导电的聚合物之间进行可逆切换,从而使新的可光控制设备成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 物理化学 物理化学
背景情况:
- 离子液体 (ILs) 具有高离子导电性和低蒸气压,使其适合电子应用.
- 使用ILs制造可光控制设备,由于稳定性和控制问题,存在重大挑战.
研究的目的:
- 开发具有可逆光和热控制的离子导电性的新型有机金属离子液体.
- 调查这些ILs在创建可调节电子设备方面的潜力.
主要方法:
- 有机金属ILs的合成和表征,其特征是子三明治Ru复合体.
- 对物理性质和刺激反应行为 (紫外线和热) 的研究.
- 在光辐射和热逆转后对离子导电性变化的分析.
主要成果:
- 紫外线光照辐射诱导的阴离子光解离,将IL转化为粘弹性协调聚合物.
- 与非协调性离子相比,具有协调性离子的IL显示出更快的反应和更高的转化率.
- 大多数光电产品在加热后恢复到原来的IL状态,显示可逆导电性变化.
结论:
- 发育的有机金属IL表现出可逆的光和热诱导的离子导电性的变化.
- 这些IL在高导电状态和低导电协调聚合物状态之间过渡.
- 合成的ILs显示出高反应性和显著的离子导电度调制,适用于可调节设备.
相关概念视频
02:51Metal-Ligand Bonds
20.7K
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...
20.7K
01:23Properties of Organometallic Compounds
990
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.
990
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.3K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.3K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.0K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.0K
00:56Extraction: Advanced Methods
446
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...
446