A new class of neutral cyclometalated iridiumACHTUNGTRENUNG(III) complexes with enantiomerically pure C1-symmetric phenol-oxazolines (3 a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding DR and LR or DS and LS isomers was easily achieved by conventional flash chromatography. The corresponding D and L helicities have been confirmed by CD spectroscopy and Xray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between D and L isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5a and 5b in CH3CN.
E. Marchi, R. Sinisi, G. Bergamini, M. Tragni, M. Monari, M. Bandini, et al. (2012). Easy Separation of D and L Isomers of Highly Luminescent [IrIII]- Cyclometalated Complexes Based on Chiral Phenol-Oxazoline Ancillary Ligands. CHEMISTRY-A EUROPEAN JOURNAL, 18(28), 8765-8773 [10.1002/chem.201200709].
Easy Separation of D and L Isomers of Highly Luminescent [IrIII]- Cyclometalated Complexes Based on Chiral Phenol-Oxazoline Ancillary Ligands
MARCHI, ENRICO;SINISI, RICCARDO;BERGAMINI, GIACOMO;TRAGNI, MICHELE;MONARI, MAGDA;BANDINI, MARCO;CERONI, PAOLA
2012
Abstract
A new class of neutral cyclometalated iridiumACHTUNGTRENUNG(III) complexes with enantiomerically pure C1-symmetric phenol-oxazolines (3 a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding DR and LR or DS and LS isomers was easily achieved by conventional flash chromatography. The corresponding D and L helicities have been confirmed by CD spectroscopy and Xray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between D and L isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5a and 5b in CH3CN.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
