含有金属的导电聚合物的层次合成:用于层间电荷传输的金属中心
Wenjun Liu1, Weijie Huang, Maren Pink
1Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA.
Journal of the American Chemical Society
|August 10, 2010
概括
研究人员从子分子中制造出含金属导电聚合物 (MCP). 这些材料表现出金属依赖的电化学特性,并在双层结构中实现电压依赖的电子传输,这对于分析分层材料非常有用.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 金属模板共凝反应产生了新的子分子.
- 电聚合是一种创建功能性聚合物的关键技术.
- 含有金属的导电聚合物 (MCP) 具有独特的电子特性.
研究的目的:
- 通过新型子分子的电聚合合成和表征含金属导电聚合物 (MCP).
- 研究不同金属中心 (Co,Fe,Ru) 对MCP电化学性能的影响.
- 探索双层MCP的潜力,以研究层间电子传输和结构秩序.
主要方法:
- 酸和氧胺的金属模板 [2 + 3] 型共凝.
- 合成的子分子的电聚合形成MCPs.
- 使用不同金属中心的单体制造双层MCP.
- 电化学表征包括循环电压测量.
- 使用聚焦离子束 (FIB) 和能量分散式X射线光谱 (EDX) 的横截面分析.
主要成果:
- 一系列含有金属的子分子被成功合成并电聚合成MCPs.
- 对于Co,Fe和Ru,MCP表现出明显的,金属依赖的电化学特性 (redox窗口).
- 双层MCP显示了电压依赖的层间电子传输,从而产生了独特的循环伏特ammograms.
- 在FIB-EDX分析中,金属中心作为有效的重原子标记物.
结论:
- 来自子分子的含金属导电聚合物表现出基于合并的金属的可调节电化学行为.
- 双层MCP促进了对层间电子传输的研究,提供了对结构秩序的洞察.
- 电化学技术为分析分层导电材料提供了简单有效的诊断工具.
相关概念视频
Metallic Solids
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. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Cationic Chain-Growth Polymerization: Mechanism
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 generated carbocation,...
Ziegler–Natta Chain-Growth Polymerization: Overview
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...
The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...


