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相关概念视频

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

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Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography
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通过ATRP的交叉链接宏观分子通过低多分散性恒星聚合物.

Haifeng Gao1, Shigeki Ohno, Krzysztof Matyjaszewski

  • 1Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.

Journal of the American Chemical Society
|November 23, 2006
PubMed
概括

一种新的原子转移激素聚合方法合成了具有高分子量和狭窄分子量分布的恒星聚合物. 这种方法最大限度地减少了合反应,产生了具有受控架构和优越性质的聚合物.

科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 恒星聚合物是复杂的宏分子,具有独特的特性.
  • 传统的合成方法往往难以达到高分子量和狭窄的分子量分布 (MWD).
  • 现有的 现有的 现有的
  • 第一个手臂.
  • 这些程序可能会导致不良的恒星-恒星合反应.

研究的目的:

  • 开发一种新方法来合成具有高分子量和窄MWD的恒星聚合物.
  • 通过优化反应条件来控制恒星聚合物的结构和特性.
  • 为了减少合成过程中星星合反应的发生率.

主要方法:

  • 使用与divinyl交叉链接器的线性宏观分子的原子转移激素 (共聚合) (ATRP).
  • 使用低摩尔质量启动器.
  • 优化启动剂与宏观素 (MM) 度的比率.
  • 在反应过程中调整交叉连接器和启动器的数量.

主要成果:

  • 成功合成了具有高分子量 (例如,Mn = 466,000 g/mol) 和窄MWD (Mw/Mn < 1.2) 的恒星聚合物.
  • 实现了高度的恒星聚合物 (>98%).

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Associated Chromosome Trap for Identifying Long-range DNA Interactions
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Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography
10:50

Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography

Published on: March 9, 2010

Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

Associated Chromosome Trap for Identifying Long-range DNA Interactions

Published on: April 23, 2011

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
06:49

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

Published on: April 22, 2016

  • 证明较低的启动器到MM比率减少了星星合,导致更窄的MWD.

    • 结论:

    • 开发的ATRP方法为高质量的恒星聚合物提供了可靠的途径.
    • 控制启动剂度和反应静电测量是实现所需分子量和MWD的关键.
    • 这种方法在合成精确定义的星聚合物架构方面取得了重大进展.