Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.1K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.9K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.9K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.4K
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...
2.4K
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

2.1K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
2.1K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.5K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.5K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Crystalline Structural Evolution in Polythiophene-Based Conjugated Polymer Blends During Rubbing.

Macromolecular rapid communications·2026
Same author

Harnessing Thin-Film Polymorphism via Regulating Conjugated Polymer-Solvent Interactions for Organic Field-Effect Transistors.

Nano letters·2026
Same author

Fundamental Insights into Crystallization and Microphase Separation of Conjugated Block Copolymers.

ACS macro letters·2026
Same author

Cocrystal Engineering of Conjugated Polymer Blends via External Electric Field for Enhanced Charge Transport.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Tuning Solution Aggregates and Thin Film Polymorphs in Conjugated Polymers via External Electric Field for Field-Effect Transistors.

ACS macro letters·2025
Same author

Transfer Printing of Two-Dimensional Molecular Crystals for Low-Voltage, High-Performance, and Degradable Transistors.

Nano letters·2025

相关实验视频

Updated: Jul 20, 2025

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.8K

通过溶剂添加处理在捐赠-接受共聚物中揭示溶液聚合和固态晶体定向之间的相关性.

Dingke Li1, Qingqing Zhao1, Hao Zheng1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.

Macromolecular rapid communications
|August 2, 2023
PubMed
概括

一种新的溶剂添加剂策略有效地控制了捐赠-接受 (D-A) 共聚物的聚合和固态晶体方向. 这种方法通过促进膜中的边缘晶体对齐来提高光电子设备的性能.

关键词:
汉森溶解度参数 汉森溶解度参数晶体的取向 晶体的方向提供者-接受者共聚合物解决方案聚合物 解决方案聚合物溶剂添加剂 溶剂添加剂

更多相关视频

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.7K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.2K

相关实验视频

Last Updated: Jul 20, 2025

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
06:16

Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering

Published on: December 21, 2017

5.8K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.7K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.2K

科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 聚合物化学 聚合物化学

背景情况:

  • 控制捐赠者-接受者 (D-A) 共聚物中的晶体方向对于光电子设备的性能至关重要.
  • 对于溶液聚合物及其与D-A共聚物中固态晶体方向的联系的了解有限.

研究的目的:

  • 开发一种溶剂添加剂策略,用于调D-A共聚合物的溶液聚合物和固态晶体结构.
  • 为了研究溶液聚合和薄膜形态之间的相关性.
  • 通过控制晶体方向来提高光电子设备的性能.

主要方法:

  • 使用聚{[N,N'-bis(2-octyldodecyl) -naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} (P(NDI2OD-T2)) 作为一个模型的D-A共聚物.
  • 用于1-decanethiol (10-thiol) 作为甲溶液中的溶剂添加剂.
  • 分析了聚合物聚合,骨干平面性和薄膜晶体方向 (边缘与面对) 的变化,使用滴滴造.

主要成果:

  • 通过改善脊柱平面性,添加1-decanethiol促进了P(NDI2OD-T2) 聚合.
  • 这导致了从混合的边缘/面对转向主导的边缘晶体方向的转变.
  • 该机制涉及10-醇和聚合物侧链之间的特定相互作用.
  • 发现片的光学特性与它们的晶体结构相关.

结论:

  • 使用1-decanethiol的强大的溶剂添加剂策略有效调节D-A共聚物中的溶液聚合物和固态晶体方向.
  • 这种方法为为各种光电子应用量身定制D-A共聚合物薄膜提供了一种简单的方法.
  • 这些发现为通过控制固态中的分子包装来优化设备性能提供了一条途径.