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Chemical treatment of weakly ionizable uncharged complexes of rhenium for the possible identification by ESI-HRMS
Málková, Nikola ; Štícha, Martin (advisor) ; Kozlík, Petr (referee)
Detailed characterization of rhenium complexes is necessary for the potential use in clinical practice and nuclear medicine. For structure characterization and quantification of coordination compounds, mass spectrometry exceeds other analytical methods in sensitivity and selectivity. The advantage of this method for coordination chemistry is the possibility of determination of the analyte directly in the reaction mixture. The compounds need to be ionized to get relevant mass spectra. The ionization of these compounds is often very difficult and it is necessary to develop a special derivatization procedures. Complexes of rhenium with 1,2-dihydroxybenzene and 4-methyl-1,2-dihydroxybenzene and it's derivatives with p- chloroaniline and p- bromoaniline have been prepared and characterized by ESI-HRMS. The fragmentation mechanisms of these complexes have been studied using a mass spectrometry technique collision-induced dissociation (CID). Keywords Rhenium complexes, rhenium, 1,2-dihydroxybenzen, 4-methyl-1,2-dihydroxybenzen, mass spektrometry, derivatization, ESI-MS, CID
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