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Updated: Jul 13, 2026

Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets
13:42

Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets

Published on: November 2, 2011

合成,通过自我组装进行分离,并对[60]富勒烯末端覆盖的异性聚 (甲基甲酸) 单分子进行观察

Takehiro Kawauchi1, Jiro Kumaki, Eiji Yashima

  • 1Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science & Technology Agency (JST), 101 Creation Core Nagoya, Shimoshidami, Moriyama-ku, Nagoya 463-0003, Japan.

Journal of the American Chemical Society
|July 14, 2005
PubMed
概括

研究人员合成和可视化了与C60分子精确地结合的立体规律的聚甲基酸 (PMMA) 链. 这一突破使得这些先进的聚合物 - 富勒烯合物的详细结构分析成为可能.

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Mass Spectrometry: Molecular Fragmentation Overview01:20

Mass Spectrometry: Molecular Fragmentation Overview

The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
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Mass Spectrometry: Carboxylic Acid, Ester, and Amide Fragmentation

The fragmentation patterns observed for compounds such as carboxylic acids, esters, and amides in the mass spectra include ⍺-cleavage and McLafferty rearrangement. Fragmentation by ⍺-cleavage preferentially occurs at the carbon-carbon bond at the ⍺-position next to the carboxylic group to generate a neutral radical and a cation. Long chain compounds with hydrogen at their γ-carbon undergo McLafferty rearrangement to give a radical cation and a neutral alkene.
For example, the fragmentation of...