Photoreactivity of iron(III)-aerobactin: photoproduct structure and iron(III) coordination.

摘要: UV photolysis of the ferric aerobactin complex results in decarboxylation α-hydroxy carboxylic acid group central citrate moiety aerobactin. The structure determination photooxidized ligand shows that occurs at forming a 3-ketoglutarate moiety. Proton and carbon-13 NMR establish presence keto enol tautomers apo-photoproduct, with form prevailing water. photoproduct retains ability to coordinate iron(III). values protonation constants, pKa Fe(III)−ligand complex, Fe(III) stability constant are all close those CD spectroscopy suggests chirality complexes its similar. Like aerobactin, promotes iron acquisition by source bacterium, Vibrio sp. DS40M5.