有机金属烯分子在电极上的光电流生成特性
Yutaka Matsuo1, Katsuhiko Kanaizuka, Keiko Matsuo
1Nakamura Functional Carbon Cluster Project, ERATO, Japan Science and Technology Agency, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. matsuo@chem.s.u-tokyo.ac.jp <matsuo@chem.s.u-tokyo.ac.jp>
Journal of the American Chemical Society
|March 18, 2008
概括
研究人员开发了新的富勒衍生物,用于光电流的产生. 这些设备中的光电流的方向可以通过分子结构和在氧化物表面的排列来控制.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 太阳能光伏发电是如何实现的
背景情况:
- 富勒烯衍生物是光电子应用的有希望的材料.
- 控制光电流的方向对于设备的效率至关重要.
研究的目的:
- 为了合成和表征新的五足烯衍生物.
- 为了研究它们在氧化物表面上产生光电流的性能.
- 探索控制光电流方向的方法.
主要方法:
- 紧,刚性,五条腿的富勒衍生物的合成:C60R5Me和M(C60R5) Cp.
- 在氧化物 (ITO) 表面上排列合成衍生物.
- 光电流的生成及其定向控制的特征.
主要成果:
- 合成的富勒烯衍生物在光电产生方面表现出高达18%的可观量子产量.
- 光电流的方向通过分子结构和几何配置都得到了成功的控制.
- 光活性受体 (富勒烯) 和供体 (金属原子) 的排列影响了光电流的方向.
结论:
- 新的富勒烯衍生物显示了高效光电产生潜力.
- 可调节的光电流方向为设备设计提供了新的可能性.
- 分子结构和表面布局之间的相互作用是控制光电子性质的关键.
相关概念视频
01:26Photochemical Electrocyclic Reactions: Stereochemistry
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
01:23Properties of Organometallic Compounds
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.
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.