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Pregled bibliografske jedinice broj: 626997

Zbornik radova

Autori: Benković, Tomislav; Tomišić, Vladislav; Frkanec, Leo; Galić, Nives
Naslov: ESI MS/MS study of calix[4]arene tryptophan derivative and its metal complexes
( ESI MS/MS study of calix[4]arene tryptophan derivative and its metal complexes )
Izvornik: XXIII. hrvatski skup kemičara i kemijskih inženjera : Knjiga sažetaka = XXIII Croatian Meeting of Chemists and Chemical Engineers : Book of abstracts ; Simpozij Vladimir Prelog = Symposium Vladimir Prelog / Hadžiev, Andrea ; Blažeković, Zdenko (ur.). - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa , 2013. 95-95 (ISBN: 978-953-6894-50-5).
Skup: Hrvatski skup kemičara i kemijskih inženjera (23 ; 2013)
Mjesto i datum: Osijek, Hrvatska, 21.-24.04.2013.
Ključne riječi: calixarenes; alkali-metal cations; lanthanides; electrospray; mass spectrometry
( calixarenes; alkali-metal cations; lanthanides; electrospray; mass spectrometry )
Sažetak:
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.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Domaća recenzija
Projekt / tema: 119-1191342-2960
Izvorni jezik: eng
Kategorija: Znanstveni
Znanstvena područja:
Kemija
Upisao u CROSBI: Nives Galić (ngalic@chem.pmf.hr:Nives.Galic@chem.pmf.hr), 26. Tra. 2013. u 14:45 sati



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