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

Leconte Nicolas | Zendy; Berthiol Florian | Zendy; Philouze Christian | Zendy; Thomas Fabrice | Zendy

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

Author(s) -

Leconte Nicolas,

Berthiol Florian,

Philouze Christian,

Thomas Fabrice

Publication year - 2021

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.202100073

Subject(s) - chemistry , electron paramagnetic resonance , deprotonation , dication , ligand (biochemistry) , copper , crystallography , resonance (particle physics) , stereochemistry , metal , molecule , ion , nuclear magnetic resonance , organic chemistry , biochemistry , receptor , physics , particle physics

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 1 2+ 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 1 2+ 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.

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