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Characterization of an insoluble poly(9,9-diphenyl-2,7- fluorene) by solvent-free sample preparation for MALDI-TOF mass spectrometry

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48881

Trimpin,  S.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons47960

Grimsdale,  Andrew C.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48626

Räder,  Hans Joachim
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Trimpin, S., Grimsdale, A. C., Räder, H. J., & Müllen, K. (2002). Characterization of an insoluble poly(9,9-diphenyl-2,7- fluorene) by solvent-free sample preparation for MALDI-TOF mass spectrometry. Analytical Chemistry, 74(15), 3777-3782.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-6569-5
Zusammenfassung
The application of solvent-free sample preparation for matrix- assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) allowed the characterization of an insoluble fraction of poly(9,9-diphenylfluorene) that was previously hindered by the lack of suitable characterization methods. The MALDI mass spectrometric analysis gives valuable mechanistic information about the heterogeneous polymerization process of the insoluble high molecular weight fraction of the polymer. The fragmentation appearing even under moderate desorption and ionization conditions of this rigid backbone analyte is identified as a multiple loss of the bulky phenyl side groups and can be avoided by applying the new MALDI matrix 7,7,8,8-tetracyanoquinodimethane. A specialized fragmentation study by postsource decay MALDI-TOF MS reveals a molecular weight dependent change in fragmentation mechanism from an exclusive cleavage of side groups from long polymer chains to an additional cleavage of the polymer backbone of short polymer chains.