Protonated hexaazamacrocycle [M•H]+ is able to detect K+ ions present at ppb level in methanolic solutions containing 10−5 M of Na+ ions. The high sensitivity and selectivity of [M•H]+ for K+ is ascribed to the favorable energy balance between the K+ ion desolvation and its coordination to the [M•H]+macrocycle, which allows the formation of the corresponding adduct before the Coulombic explosion of the ESI-MS nanodroplets.
Protonated hexaazamacrocycles as selective K+ receptors / Fraschetti, Caterina; Filippi, Antonello; Crestoni, Maria Elisa; Enrico, Marcantoni; Marco, Glucini; Guarcini, Laura; Montagna, Maria; Guidoni, Leonardo; Speranza, Maurizio. - In: JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY. - ISSN 1044-0305. - ELETTRONICO. - 26:7(2015), pp. 1186-1190. [10.1007/s13361-015-1104-3]
Protonated hexaazamacrocycles as selective K+ receptors
FRASCHETTI, CATERINA;FILIPPI, Antonello;CRESTONI, Maria Elisa;GUARCINI, LAURA;MONTAGNA, MARIA;GUIDONI, LEONARDO;SPERANZA, Maurizio
2015
Abstract
Protonated hexaazamacrocycle [M•H]+ is able to detect K+ ions present at ppb level in methanolic solutions containing 10−5 M of Na+ ions. The high sensitivity and selectivity of [M•H]+ for K+ is ascribed to the favorable energy balance between the K+ ion desolvation and its coordination to the [M•H]+macrocycle, which allows the formation of the corresponding adduct before the Coulombic explosion of the ESI-MS nanodroplets.| File | Dimensione | Formato | |
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