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多阶段质谱揭示新型脂肪族生物聚酯合成类似物的分子水平结构。

Molecular level structure of novel synthetic analogues of aliphatic biopolyesters as revealed by multistage mass spectrometry.

机构信息

Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-819 Zabrze, Poland.

Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland.

出版信息

Anal Chim Acta. 2014 Jan 15;808:104-14. doi: 10.1016/j.aca.2013.09.001. Epub 2013 Sep 6.

DOI:10.1016/j.aca.2013.09.001
PMID:24370097
Abstract

The present study focuses on electrospray ionisation (ESI) tandem mass spectrometry of novel copolyesters obtained by anionic ring-opening copolymerisation of β-substituted β-lactones. Detailed analysis of these copolyesters, including molecular chain architecture as well as the structures of the end groups, was performed using ESI-MS/MS collision-induced dissociation spectra. The random arrangement of comonomeric units along the copolyester chains was demonstrated by comparison of ESI-MS(n) fragmentation spectra and fragmentation pathways. Sequence distribution analysis of comonomeric units confirmed the copolymer's random structure. ESI-MS(n) proved to be a promising technique for structural analysis of copolyesters obtained via anionic ROP.

摘要

本研究专注于通过β-取代β-内酰胺的阴离子开环共聚反应得到的新型共聚酯的电喷雾离子化（ESI）串联质谱法。通过 ESI-MS/MS 碰撞诱导解离光谱对这些共聚酯进行了详细分析，包括分子链结构以及端基结构。通过比较 ESI-MS(n) 碎裂光谱和碎裂途径，证明了共聚酯链上单体单元的随机排列。通过对单体单元的序列分布分析，证实了共聚物的无规结构。ESI-MS(n) 被证明是一种很有前途的技术，可用于分析通过阴离子 ROP 得到的共聚酯的结构。

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