Premium
Synthesis of 2,6‐Bis(oxazolyl)pyridine Ligands for Luminescent Ln III Complexes
Author(s) -
Pereira Goreti,
Ferreira Miguel F.,
Castanheira Elisabete M. S.,
Martins José A.,
Ferreira Paula M. T.
Publication year - 2012
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201200177
Subject(s) - chemistry , pyridine , dipicolinic acid , moiety , oxazole , luminescence , lanthanide , medicinal chemistry , chloride , picolinic acid , derivative (finance) , stereochemistry , organic chemistry , ion , botany , physics , optoelectronics , spore , financial economics , economics , biology
New bis(oxazolyl)pyridine ligands for Ln III ions were prepared by using an expeditious methodology from threonine and dipicolinic 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+ .