Easy Separation of [Delta] and [Lambda] Isomers of Highly Luminescent [IrIII]-Cyclometalated Complexes Based on Chiral Phenol-Oxazoline Ancillary Ligands

A new class of neutral cyclometalated iridium(III) complexes with enantiomerically pure C1-symmetric phenol-oxazolines (3a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding [Delta]R and [Lambda]R or [Delta]S and [Lambda]S isomers was easily achieved by...

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Bibliographic Details
Published in:Chemistry : a European journal 2012-07, Vol.18 (28), p.8765
Main Authors: Marchi, Enrico, Sinisi, Riccardo, Bergamini, Giacomo, Tragni, Michele, Monari, Magda, Bandini, Marco, Ceroni, Paola
Format: Article
Language:English
Subjects:
Chemistry
Phenols
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Summary:A new class of neutral cyclometalated iridium(III) complexes with enantiomerically pure C1-symmetric phenol-oxazolines (3a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding [Delta]R and [Lambda]R or [Delta]S and [Lambda]S isomers was easily achieved by conventional flash chromatography. The corresponding [Delta] and [Lambda] helicities have been confirmed by CD spectroscopy and X-ray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between [Delta] and [Lambda] isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5a and 5b in CH3CN.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201200709