Study of a phosphorescent cationic iridium(iii) complex displaying a blue-shift in crystals

We report the synthesis and the characterization of a new cationic iridium(iii) complex featuring two 1-(p-methoxyphenyl)-5-methoxybenzimidazole cyclometallating ligands and a dimethylbipyridine ancillary ligand. The complex has been fully characterized by 1D and 2D NMR (1H{,} 13C{,} 19F and 31P){,} elemental analysis and high-resolution mass spectrometry (HRMS). The photoluminescence studies performed in a solution{,} on amorphous powder and on crystals revealed an unexpected behavior. Indeed{,} the emission spectra observed in both solution (CH2Cl2) and amorphous powder samples are centered at around 580 nm{,} whereas in crystals the emission displays a large hypsochromic shift of ∼800 cm−1 (λem = 558 nm). X-ray diffraction experiments{,} photophysical studies and DFT calculations allow for rationalizing the hypsochromic shift.

Références

Titre
Study of a phosphorescent cationic iridium(iii) complex displaying a blue-shift in crystals
Type de publication
Article de revue
Année de publication
2021
Revue
Phys. Chem. Chem. Phys.
Volume
23
Pagination
24789-24800
Soumis le 30 novembre 2021