Radical cation formation in characterization of novelC3-symmetric disks and their precursors by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
作者:Xianwen Lou、Kelly P. van den Hout、Michel H. C. J. van Houtem、Joost L. J. van Dongen、Jef A. J. M. Vekemans、E. W. Meijer
DOI:10.1002/jms.1025
日期:2006.5
that strong radical ion signals were observed for all the compounds, including the anilines that were expected to be protonated prior to laser irradiation using acidic MALDI matrixes. Possible mechanisms for radical ion formation were investigated with the employment of radical scavengers, with various matrixes and with direct laser desorption/ionization (LDI). Most likely the radicals are formed by
Tuning the Stacking Properties ofC3-Symmetrical Molecules by Modifying a Dipeptide Motif
作者:Kelly P. van den Hout、Rafael Martín-Rapún、Jef A. J. M. Vekemans、E. W. Meijer
DOI:10.1002/chem.200700630
日期:2007.10.5
between the secondary interactions originating from the benzenetricarboxamide core and the dipeptide fragments, have a strong influence on the order within the stack. From these results it can be concluded that subtle modifications in the peptide fragments of the discs cause significant changes in the stackingproperties, stressing the importance of understanding the self-assembly mechanism of each discotic