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. [Figure not available: see fulltext.] © 2015 American Society for Mass Spectrometry.
Protonated hexaazamacrocycles as selective K+ receptors
MONTAGNA, MARIA;GUIDONI, Leonardo;
2015-01-01
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. [Figure not available: see fulltext.] © 2015 American Society for Mass Spectrometry.File in questo prodotto:
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