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Default Dynamics of Coordinated Phosphonate Group Directly Observed by 17O-NMR in Lanthanide(III) Complexes of a Mono(ethyl phosphonate) DOTA Analogue

Dynamics of Coordinated Phosphonate Group Directly Observed by 17O-NMR in Lanthanide(III) Complexes of a Mono(ethyl phosphonate) DOTA Analogue

Biological phosphates can coordinate metal ions and their complexes are common in living systems. Dynamics of mutual oxygen atom exchange in the tetrahedral group in complexes has not been investigated. Here, we present a direct experimental proof of the exchange ("phosphonate rotation") in model Ln(III) complexes of monophosphonate H4dota analogue which alters phosphorus atom chirality of coordinated phosphonate monoester. Combination of macrocycle-based isomerism with P-based chirality leads...

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