半合成亜鉛塩素染料組の効率的な充電輸送
Sameer Patwardhan1, Sanchita Sengupta, Laurens D A Siebbeles
1Optoelectronic Materials Section, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands.
Journal of the American Chemical Society
|September 19, 2012
まとめ
半合成亜鉛塩素 (ZnChls) は1Dまたは2D構造に自己組み立てられ,効率的な電荷輸送を示しています. これらの発見は,生物学的システムにインスパイアされた超分子電子学の道を開く.
科学分野:
- マテリアルサイエンス 材料科学
- 超分子化学 超分子化学
- オーガニック・エレクトロニクス
背景:
- 半合成塩素亜鉛 (ZnChls) の自己組み立て構造が研究されています.
- これらの固体材料における電荷輸送の理解は,電子アプリケーションにとって極めて重要です.
研究 の 目的:
- 自己組み立てのZnChlsの電荷輸送特性を調査する.
- 異なる組立型 (1Dチューブル型と2Dスタック型) で,分子構造と電荷輸送効率を相関させる.
主な方法:
- パルス放射溶解による時間解像度マイクロ波伝導度測定を用いた.
- 固体ZnChlアセンブリにおける電荷輸送特性の特徴.
主要な成果:
- 1D管状および2D積み重ねのZnChlアセンブリの両方で効率的な電荷輸送が観察されました.
- 達成された高電荷キャリアの移動性は,1Dの場合は最大0.07cm2~0.28cm2~0.28cm2~0.07cm2~0.07cm2~0.28cm2~0.28cm2~0.28cm2~0.07cm2~0.28cm2~0.28cm2~0.07cm2~0.28cm2~0.28cm2~0.28cm2~0.28cm2~0.28cm2~0.07cm2~0.28cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm2~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm3~0.0cm
- 負荷輸送効率の特定の分子構造と結果の組立型への依存を証明した.
結論:
- 自己組み立てのZnChlsは,効率的な電荷輸送能力を発揮しています.
- 1Dチューブ状または2Dスタックされたアレンジメントの形成は,電荷の移動性に大きく影響します.
- これらの発見は,生物学的にインスパイアされたシステムを利用した超分子電子技術の開発を支持します.
さらに関連する動画
関連する概念動画
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...
Electron Transport Chain: Complex III and IV
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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...
The Photochemical Reaction Center
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
Electron Transport Chains
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...


