由有机电子材料制成的多块瓶刷纳米纤维
Christopher M Tonge1, Ethan R Sauvé1, Susan Cheng1
1Department of Chemistry , The University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada.
Journal of the American Chemical Society
|September 6, 2018
概括
研究人员创建了独特的类似纤维的纳米材料,模仿单个聚合物链上的有机电子设备结构. 这一突破使得有机电子应用的先进材料能够小型化.
科学领域:
- 聚合物化学
- 材料科学
- 有机电子
背景情况:
- 有机电子设备的功能依赖于多层结构.
- 在分子层面上合成复杂,有序的纳米结构是具有挑战性的.
研究的目的:
- 开发一种在单个聚合物链上制造多层结构的纤维类纳米材料的方法.
- 在宏分子层面模仿有机电子设备的架构.
主要方法:
- 采用了铜催化可逆失活激素聚合 (RDRP) 和环开转化聚合 (ROMP) 的组合.
- 从有机半导体的有序序列合成的多块瓶共聚物.
- 从常见的有机电子材料 (孔传输,电子传输,主体) 制成的狭窄分散的纤维.
主要成果:
- 达到高分子量 (> 2 × 10^6 Da) 的低分散率 (低至 1.12).
- 合成的双块纳米纤维形成p-n连接与可逆电化学.
- 在单个宏分子上构建光有机发光二极管 (OLED) 的结构纳米纤维.
结论:
- 开发的策略允许在不需要晶体性或超分子相互作用的情况下创建任意的有机半导体纳米纤维.
- 这为先进的有机电子设备的小型化提供了强大的方法.
- 在构造的纳米纤维中,可以对每个组件的光物理性质进行独立观察.
相关概念视频
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
3.5K
Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...
3.5K
Electron Transport Chains
112.4K
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...
112.4K
Organization of Genes
73.6K
Overview
73.6K
Electron Carriers
91.9K
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
91.9K
Organic Compounds
57.5K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
57.5K
Electron Affinity
43.4K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
43.4K


