Premium
Complexation of late transition metal(II) ions (M = Co, Ni, Cu, and Zn) by a macrocyclic thiacrown ether studied by means of electrospray ionization mass spectrometry
Author(s) -
Tsierkezos Nikos G.,
Buchta Michal,
Holý Petr,
Schröder Detlef
Publication year - 2009
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.4035
Subject(s) - chemistry , electrospray ionization , copper , redox , selectivity , ether , dichloromethane , mass spectrometry , transition metal , metal , inorganic chemistry , metal ions in aqueous solution , ligand (biochemistry) , electrospray , organic chemistry , chromatography , catalysis , solvent , biochemistry , receptor
Electrospray ionization mass spectrometry (ESI‐MS) is used to probe the metal‐binding selectivity of a macrocyclic thiacrown ether (C 44 H 32 S 20 ) towards Co II , Ni II , Cu II , and Zn II . In homogeneous 1:1 v/v methanol/dichloromethane solutions, it is found that the thia ligand very selectively binds traces of copper even in the presence of an excess of the other metal ions. The large selectivity is ascribed to the redox‐active nature of copper which enables a reduction from Cu II to Cu I , occurring upon ESI‐MS, whereas Co II , Ni II and Zn II cannot undergo similar redox reactions. Copyright © 2009 John Wiley & Sons, Ltd.