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Histidine‐Containing Bisperoxovanadium(V) Compounds: Insight Into the Solution Structure by an ESI‐MS and 51 V‐NMR Comparative Study
Author(s) -
Bortolini Olga,
Carraro Mauro,
Conte Valeria,
Moro Stefano
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199909)1999:9<1489::aid-ejic1489>3.0.co;2-x
Subject(s) - chemistry , moiety , histidine , ligand (biochemistry) , vanadium , molecule , nuclear magnetic resonance spectroscopy , mass spectrometry , aqueous solution , stereochemistry , combinatorial chemistry , organic chemistry , enzyme , biochemistry , chromatography , receptor
ESI mass spectrometry and 51 V‐NMR spectroscopy have been used to study the reactions occurring between bisperoxo vanadates and a number of histidine and histidine‐like ligands, in aqueous alcoholic solutions. Coordination of one and two molecules of ligand is observed with all the compounds investigated affording [VO 5 L] − and [VO 5 2L] − , respectively. Characterization of these species has been achieved by MS n experiments, which have allowed specific fragmentations of the peroxidic moiety to be distinguished. In particular, with [VO 5 2L] − , two distinct modes of decomposition were observed, depending on the presence in the ligand of a free carboxylic function. – Possible biochemical implications related to vanadium haloperoxidase enzymes are discussed.