Duez Quentin, Liénard Romain, Moins Sébastien, Lemaur Vincent, Coulembier Olivier, Cornil Jérôme, Gerbaux Pascal, De Winter Julien
Organic Synthesis and Mass Spectrometry Laboratory, Interdisciplinary Center for Mass Spectrometry (CISMa), University of Mons, UMONS, 23 Place du Parc, 7000 Mons, Belgium.
Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, UMONS, 23 Place du Parc, 7000 Mons, Belgium.
Polymers (Basel). 2019 Apr 16;11(4):688. doi: 10.3390/polym11040688.
Several families of polymers possessing various end-groups are characterized by ion mobility mass spectrometry (IMMS). A significant contribution of the end-groups to the ion collision cross section (CCS) is observed, although their role is neglected in current fitting models described in literature. Comparing polymers prepared from different synthetic procedures might thus, be misleading with the current theoretical treatments. We show that this issue is alleviated by comparing the CCS of various polymer ions (polyesters and polyethers) as a function of the number of atoms in the macroion instead of the usual representation involving the degree of polymerization. Finally, we extract the atom number density from the spectra which gives us the possibility to evaluate the compaction of polymer ions, and by extension to discern isomeric polymers.
通过离子淌度质谱法（IMMS）对具有各种端基的几个聚合物家族进行了表征。尽管端基在文献中描述的当前拟合模型中被忽略，但观察到它们对离子碰撞截面（CCS）有显著贡献。因此，用当前的理论处理方法比较由不同合成程序制备的聚合物可能会产生误导。我们表明，通过比较各种聚合物离子（聚酯和聚醚）的CCS作为大离子中原子数的函数，而不是通常涉及聚合度的表示方法，可以缓解这个问题。最后，我们从光谱中提取原子数密度，这使我们有可能评估聚合物离子的致密程度，并进而辨别同分异构聚合物。
