表面的侧向自我排序:对双通道光系统的实用方法
Marco Lista1, Jetsuda Areephong, Naomi Sakai
1Department of Organic Chemistry, University of Geneva, Geneva 1211, Switzerland.
Journal of the American Chemical Society
|June 18, 2011
概括
在表面启动的共聚合过程中进行自我排序,可以创建定向的多元组件架构. 这种方法显著提高了超分子光系统中的光电流生成,并证明了自我修复能力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 超分子化学 超分子化学
背景情况:
- 通过表面启动的共聚合,可以创建复杂的聚合物结构.
- 控制表面的分子组织对于先进的材料特性至关重要.
- 超分子化学提供了通过非共价相互作用设计功能材料的途径.
研究的目的:
- 为了研究表面启动共聚合 (co-SOSIP) 过程中的自我排序行为.
- 探索面向的多组件架构的形成及其对材料性能的影响.
- 为了证明这些自我组织系统的自我修复潜力.
主要方法:
- 使用自组织表面启动共聚合 (co-SOSIP) 进行材料合成.
- 分析自我排序现象,包括横向和轴向安排.
- 描述由此产生的超分子n/p-异质连接光系统.
主要成果:
- 通过自我排序,轻松访问面向的多组件架构.
- 交替的横向和均的轴向自我排序导致了超分子n/p-heterojunctions.
- 由于优化的自我排序,光电流的产生增加了多达40倍.
- 在co-SOSIP过程中存在自我修复机制的证据.
- 表面启动器作为模板,用于可调节组合的多通道架构.
结论:
- 在co-SOSIP中进行自我排序是创建高效的面向多组件架构的强大策略.
- 拓匹配对自我排序结果和由此产生的电子特性产生了关键的影响.
- 证明的自我修复和模板设计能力凸显了co-SOSIP在先进材料设计中的多功能性.
相关概念视频
Photosystem II
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
Photosystem I
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Photosystems
Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
The Z-Scheme of Electron Transport in Photosynthesis
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
The Antenna Complex
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...


