Copper Complexes of the Tetradentate N,N′-Bis(2-amino-3,5-di-tert-butylphenyl)-2,2′-diaminobiphenyl Ligand

Abstract The ligand N,N′-bis(2-amino-3,5-di-tert-butylphenyl)-2,2′-diaminobiphenyl was synthesized and coordinated to copper. Complex 1+ was structurally characterized, showing two deprotonated diiminobenzoquinone ligands coordinated to a single Cu(I) center. The paramagnetic complexes 1 and 12+ were generated and characterized by EPR and Vis-NIR spectroscopy. Complex 1 exhibits an isotropic resonance at g=2.00, which is reminiscent of Cu(I) diiminosemiquinone species. The dication 12+ exhibits a metal-based ground spin state and hence is described as a Cu(II) diiminobenzoquinone complex. Both 1 and 1+ show a NIR band (954, 980 nm) of high intensity (>20 mM−1 cm−1) assigned to ligand-based charge transfer transitions.

Références

Titre
Copper Complexes of the Tetradentate N,N′-Bis(2-amino-3,5-di-tert-butylphenyl)-2,2′-diaminobiphenyl Ligand
Type de publication
Article de revue
Année de publication
2021
Revue
European Journal of Inorganic Chemistry
Volume
2021
Pagination
1481-1489
Soumis le 9 juin 2021