An insight into the gas-phase fragmentations of potential molecular sensors with porphyrin-chalcone structures

abstract

Porphyrin-chalcone derivatives with potential cation sensing ability have been studied by ESI-MS and multistage ESI-MS. The presence of conjugated C=C and C=O double bonds in the chalcone moiety is responsible for the formation of diagnostic fragment ions common to all the studied meta and para chalcones. The ortho isomers show different fragmentation patterns that can be explained by different electronic charge distributions. (C) 2015 Elsevier B.V. All rights reserved.

keywords

TANDEM MASS-SPECTROMETRY; ELECTROSPRAY-IONIZATION; FLUORESCENT SENSORS; METAL-IONS; CADMIUM

subject category

Physics; Spectroscopy

authors

Ramos, CIV; Moura, NMM; Santos, SMF; Faustino, MA; Tome, JPC; Amado, FML; Neves, MGPMS

our authors

acknowledgements

The authors would like to thank Fundacao para a Ciencia e a Tecnologia (FCT, Portugal), the European Union, QREN, FEDER, COMPETE, for funding the Organic Chemistry Research Unit (QOPNA) (project PEst-C/QUI/UI0062/2013; FCOMP-01-0124-FEDER-037296). Catarina I.V. Ramos and Nuno M.M. Moura thanks FCT for their Post-Doc scholarships SFRH/BPD/85902/2012 and SFRH/BPD/84216/2012, respectively. Sergio M.F. Santos thanks FCT for the FCT Investigator starting grant IF/00973/2014.

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