ESI MS/MS study of calix[4]arene tryptophan derivative and its metal complexes (CROSBI ID 596247)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | domaća recenzija
Podaci o odgovornosti
Benković, Tomislav ; Tomišić, Vladislav ; Frkanec, Leo ; Galić, Nives
engleski
ESI MS/MS study of calix[4]arene tryptophan derivative and its metal complexes
The peptidocalixarene 1 bearing tryptophan subunits at the lower rim 1 and its complexes with alkali-metal (Li+, Na+, K+, Rb+, Cs+) and selected lanthanide cations (La3+, Ce3+, Eu3+, Yb3+) were analyzed by ESI MS. The influences of the solvent (acetonitrile, methanol, addition of formic acid or sodium acetate) and the calixarene:cation molar ratio on signal intensities were investigated. Comprehensive MS/MS analyses of all singly and doubly charged ions of 1 and its complexes were performed, and the fragmentation pathways were proposed. An inductive cleavage was observed during dissociation of protonated ions, whereas the presence of alkali-metal or lanthanide cations caused homolytic cleavage and formation of radical cations. The results of MS analyses were in accordance with those obtained by other techniques (spectrophotometric, potentiometric, and conductometric titrations). The MS/MS experiments could be used as fast and sensitive method for prediction of relative stabilities of calixarene complexes with metal ions.
calixarenes ; alkali-metal cations ; lanthanides ; electrospray ; mass spectrometry
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Podaci o prilogu
95-95.
2013.
objavljeno
Podaci o matičnoj publikaciji
23. Hrvatski skup kemičara i kemijskih inženjera : knjiga sažetaka
Hadžiev, Andrea ; Blažeković, Zdenko
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI)
978-953-6894-50-5
Podaci o skupu
23. HRVATSKI SKUP KEMIČARA I KEMIJSKIH INŽENJERA
poster
21.04.2013-24.04.2013
Osijek, Hrvatska