Easy Separation of Δ and Λ Isomers of Highly Luminescent [Ir III ]‐Cyclometalated Complexes Based on Chiral Phenol‐Oxazoline Ancillary Ligands | Zendy

Marchi Enrico | Zendy; Sinisi Riccardo | Zendy; Bergamini Giacomo | Zendy; Tragni Michele | Zendy; Monari Magda | Zendy; Bandini Marco | Zendy; Ceroni Paola | Zendy

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Easy Separation of Δ and Λ Isomers of Highly Luminescent [Ir III ]‐Cyclometalated Complexes Based on Chiral Phenol‐Oxazoline Ancillary Ligands

Author(s) -

Marchi Enrico,

Sinisi Riccardo,

Bergamini Giacomo,

Tragni Michele,

Monari Magda,

Bandini Marco,

Ceroni Paola

Publication year - 2012

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201200709

Subject(s) - oxazoline , phenol , chemistry , luminescence , combinatorial chemistry , organic chemistry , materials science , optoelectronics , catalysis

A new class of neutral cyclometalated iridium(III) complexes with enantiomerically pure C 1 ‐symmetric phenol‐oxazolines ( 3 a,b ) have been synthetized in high yields and fully characterized. Resolution of the corresponding Δ R and Λ R or Δ S and Λ S isomers was easily achieved by conventional flash chromatography. The corresponding Δ and Λ helicities have been confirmed by CD spectroscopy and X‐ray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between Δ and Λ isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5 a and 5 b in CH 3 CN.

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