Kirschbaum R, Prenzel D, Frankenberger S, Tykwinski R, Drewello T (2015)
Publication Status: Published
Publication Type: Journal article
Publication year: 2015
Publisher: American Chemical Society
Book Volume: 119
Pages Range: 2861-2870
Journal Issue: 5
DOI: 10.1021/jp5112444
End group-protected linear polyynes of composition Tr*-(C C)(n)-Tr* (with Tr* representing the super trityl group and n = 2, 4, 6, 8, 10) and tBu-(C C)(6)-tBu (with tBu being the tertiary butyl group) have been studied by laser desorption ionization (LDI) time-of-flight (ToF) mass spectrometry. tBu-terminated polyyne molecules show considerably higher stability during laser activation than Tr*-end-capped polyyne molecules. A key feature is the abundant formation of oligomeric species upon laser activation. Tandem mass spectrometry reveals strong bonding within the oligomers which indicates cross-linking of the former polyynes within the oligomers. The process is more abundantly occurring and less energy demanding than the laser-induced coalescence of C-60. Cross-linking is more efficient with the smaller end group (tBu), and larger oligomers are formed when the chain length of the polyyne increases, both a result of enhanced interaction of the triple bonds in neighboring chains. The presence of the matrix molecules in matrix-assisted (MA)LDI hinders the polyyne interaction, and oligomer formation is markedly reduced.
APA:
Kirschbaum, R., Prenzel, D., Frankenberger, S., Tykwinski, R., & Drewello, T. (2015). Laser Desorption Mass Spectrometry of End Group-Protected Linear Polyynes: Evidence of Laser-Induced Cross-Linking. Journal of Physical Chemistry C, 119(5), 2861-2870. https://dx.doi.org/10.1021/jp5112444
MLA:
Kirschbaum, Rolf, et al. "Laser Desorption Mass Spectrometry of End Group-Protected Linear Polyynes: Evidence of Laser-Induced Cross-Linking." Journal of Physical Chemistry C 119.5 (2015): 2861-2870.
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