Structural characterization of poly(amino)ester dendrimers and related impurities by electrospray tandem mass spectrometry
作者:Aura Tintaru、Valérie Monnier、Camille Bouillon、Rémi Giordanengo、Gilles Quéléver、Ling Peng、Laurence Charles
DOI:10.1002/rcm.4628
日期:2010.8.15
poly(amino)ester dendrimer was studied by electrospray ionization tandem mass spectrometry to establish its fragmentation pathways, with the aim of using them to investigate the structure of any defective molecules generated during the dendrimer synthesis. This poly(amino)ester dendrimer could be ionized in both polarities but the most structurally relevant dissociation pathways were found from the deprotonated
通过电喷雾电离串联质谱研究了一种酸封端的聚(氨基)酯树状聚合物,以建立其断裂途径,目的是利用它们研究在树状聚合物合成过程中产生的任何有缺陷分子的结构。该聚(氨基)酯树状聚合物可以在两个极性下均被电离,但是在负离子模式下从去质子化的分子中发现了与结构最相关的解离途径。该树枝状聚合物的解离模式已得到充分描述,并得到精确的质量测量结果的支持。带有负电荷的多元酸性树枝状大分子的主要离解反应显示为:(i)分支中二氧化碳和乙烯的释放,该过程进行的次数与完整中性分支的可用次数相同;(ii)消除整个树枝状聚合物臂。监测这些反应的发生以及与这两个主要途径的任何偏离,可以对六种主要的树枝状杂质进行结构表征。版权所有©2010 John Wiley&Sons,Ltd.