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Wiley, European Journal of Organic Chemistry, 21(2012), p. 3905-3910, 2012

DOI: 10.1002/ejoc.201200177

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Synthesis of 2,6-Bis(oxazolyl)pyridine Ligands for Luminescent LnIII Complexes

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This paper is available in a repository.

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Abstract

Submitted to the European Journal of Organic Chemistry ; New bis-(oxazolyl)pyridine ligands for Ln(III) ions were prepared using a expeditious methodology from threonine and dipicolinic acid chloride. The synthetic strategy includes a dehydration step to give a bis-dehydroaminobutyric acid derivative followed by bromination and cyclization with DBU. Photophysical studies of Eu(III) and Tb(III) complexes of these ligands showed that the 2,6-bis-(oxazolyl)pyridine moiety acts as an effective sensitizer for lanthanide luminescence and indicate the formation of 3:1 complexes [Ln-(bis-(oxazole)pyridine)3]3+.