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Photochemical behaviour of the Nd(III) and Ho(III) complexes of ethylenediaminetetraacetic acid
Affiliation:1. Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;2. Department of Anesthesiology and Pain Medicine, Toronto Western Hospital, University of Toronto, Canada;3. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
Abstract:The photochemical decomposition of Nd3+/EDTA and Ho3+/EDTA has been carried out at 300 nm, and followed by changes within the hypersensitive absorption transitions of these ions. It was found that a single decarboxylation of the EDTA ligand occurred, and CO2 gas was evolved. The reaction terminates after approx. 1 mol of CO2 per mole of EDTA is produced, since the photoproduct absorbs strongly at 300 nm. Initial quantum yields were found to vary with pH, but averaged between 0.1 and 0.5 mol/Einstein.
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