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Two competitive INC-mediated reactions in the gas-phase fragmentation of protonated indolyl benzo[b]carbazoles.

RATIONALE
Ion-neutral complexes (INCs) are intermediates extensively existing in gas-phase ionic reactions.


METHODS
Tandem mass spectrometry (MS(n) ) analysis of indolyl benzo[b]carbazoles was performed on an electrospray ionization quadrupole time-of-flight (ESI-Q-TOF) mass spectrometer in positive ion mode.


RESULTS
Two competing INC-mediated reactions were obtained in the fragmentation of protonated indolyl benzo[b]-carbazoles.


CONCLUSIONS
This study enriches our knowledge of the important roles of INCs in the dissociation of indole compounds in the gas phase. Copyright © 2016 John Wiley & Sons, Ltd.