Controlled nitrene transfer from a tyrosinase-like arylnitroso–copper complex

2015 ◽  
Vol 51 (56) ◽  
pp. 11206-11209 ◽  
Author(s):  
Mohammad S. Askari ◽  
Maylis Orio ◽  
Xavier Ottenwaelder
Keyword(s):  
Electronic Structure ◽  
Copper Complex ◽  
Dinuclear Complex ◽  
Nitrene Transfer

The reaction between p-nitrosonitrobenzene and the tetramethylpropylenediamine–copper(i) complex yields a dinuclear complex that has similar topology, electronic structure and reactivity as side-on peroxo species known in Cu/O2 chemistry.

scholarly journals Non-innocent ground state electronic structure of a polynuclear copper complex with picolinate bridges

2018 ◽  
Vol 472 ◽  
pp. 307-319
Author(s):  
Róbert Csonka ◽  
Dóra Lakk-Bogáth ◽  
Ágnes Gömöry ◽  
László Drahos ◽  
Michel Giorgi ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Copper Complex ◽  
Ground State

Geometric and Electronic Structure of the Heme−Peroxo−Copper Complex [(F8TPP)FeIII−(O22-)−CuII(TMPA)](ClO4)

2005 ◽  
Vol 127 (34) ◽  
pp. 11969-11978 ◽  
Author(s):  
Diego del Río ◽  
Ritimukta Sarangi ◽  
Eduardo E. Chufán ◽  
Kenneth D. Karlin ◽  
Britt Hedman ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Copper Complex

Oxidation of copper(II) hydroxyporphyrin (oxophlorin); oxidative ring opening and formation of an ester-linked, dinuclear copper complex

2001 ◽  
Vol 79 (5-6) ◽  
pp. 922-929 ◽  
Author(s):  
Shane Phillips ◽  
Bruce C Noll ◽  
Marilyn M Olmstead ◽  
Alan L Balch
Keyword(s):  
Crystal Structure ◽  
Copper Complex ◽  
Epr Spectroscopy ◽  
Ring Opening ◽  
Oxidative Cleavage ◽  
Dinuclear Complex ◽  
Dinuclear Copper ◽  
Ring Opening Reaction ◽  
Copper Porphyrin ◽  
Ester Linkage

Addition of copper(II) acetate to octaethyl(meso-hydroxy)porphyrin (H2OEPOH) in THF under a dinitrogen atmosphere produces CuII(OEPOH), which has been isolated as red crystals and shown to have a meso-hydroxyporphyrin structure by UV-vis and EPR spectroscopy. CuII(OEPOH) undergoes oxidation by dioxygen to form a novel dinuclear copper complex {CuII(OEPOC(O)OEB)CuII}. This dinuclear complex is composed of a copper(II) meso-substituted porphyrin portion (with a planar CuN4 unit), which is attached through an ester linkage to a helical copper(II) tetrapyrrole that has been ring-opened through oxidative cleavage of a second molecule of CuII(OEPOH). The oxidative ring-opening reaction resembles that of natural heme catabolism but is arrested at a stage where the oxidized meso-carbon is still appended to the helical open tetrapyrrole. A mechanism is suggested for this process.Key words: copper porphyrin, crystal structure, porphyrin oxidation, linear tetrapyrrole, hydroxy-porphyrin, oxophlorin.

Counter-ligand control of the electronic structure in dinuclear copper-tetrakisguanidine complexes

2015 ◽  
Vol 44 (44) ◽  
pp. 19111-19125 ◽  
Author(s):  
Alexandra Ziesak ◽  
Tobias Wesp ◽  
Olaf Hübner ◽  
Elisabeth Kaifer ◽  
Hubert Wadepohl ◽  
...  
Keyword(s):  
Decision Making ◽  
Electronic Structure ◽  
Copper Complex ◽  
Complex Type ◽  
Neutral Complex ◽  
Dinuclear Copper ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active

Decision-making counter-ligands: a bridging redox-active ligand in a dinuclear copper complex could be either neutral (complex type [CuII-GFA-CuII]) or dicationic (complex type [CuI-GFA-CuI]), depending on the nature of the counter-ligands X.

Geometric and electronic structure and dioxygen sensitivity of the copper complex of octaethylbilindione, a biliverdin analog

1993 ◽  
Vol 115 (25) ◽  
pp. 12206-12207 ◽  
Author(s):  
Alan L. Balch ◽  
Marinella Mazzanti ◽  
Bruce C. Noll ◽  
Marilyn M. Olmstead
Keyword(s):  
Electronic Structure ◽  
Copper Complex

scholarly journals Ground- and Excited-State Electronic Structure of an Emissive Pyrazine-Bridged Ruthenium(II) Dinuclear Complex

2005 ◽  
Vol 127 (4) ◽  
pp. 1229-1241 ◽  
Author(s):  
Wesley R. Browne ◽  
Noel M. O'Boyle ◽  
William Henry ◽  
Adrian L. Guckian ◽  
Sabine Horn ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Excited State ◽  
Dinuclear Complex

scholarly journals A Di Copper Peptidyl Complex Mimics Catalase Activity in HeLa HyPer Cells

2020 ◽  
Author(s):  
Koudedja Coulibaly ◽  
Marion Thauvin ◽  
Adyn Melenbacher ◽  
Clara testard ◽  
Evangelia Trigoni ◽  
...  
Keyword(s):  
Copper Complex ◽  
Catalase Activity ◽  
Copper Complexes ◽  
Redox Chemistry ◽  
Dinuclear Complex ◽  
Cellular Assay ◽  
In Cells

In this manuscript, we describe the implementation of a combinatorial apporach to synthesize a library of copper complexes, associated with an activity-based screening to discover the first peptidyl di copper complex mimicking CAT redox chemistry. The selected dinuclear complex was studied in detail and characterized for its CAT activity i<i>n vitro</i> and in cells. Very interestingly, despite moderate intrinsic catalysis constant, this complex was efficacious in a cellular assay.<br>

scholarly journals A Di Copper Peptidyl Complex Mimics Catalase Activity in HeLa HyPer Cells

2020 ◽  
Author(s):  
Koudedja Coulibaly ◽  
Marion Thauvin ◽  
Adyn Melenbacher ◽  
Clara testard ◽  
Evangelia Trigoni ◽  
...  
Keyword(s):  
Copper Complex ◽  
Catalase Activity ◽  
Copper Complexes ◽  
Redox Chemistry ◽  
Dinuclear Complex ◽  
Cellular Assay ◽  
In Cells

In this manuscript, we describe the implementation of a combinatorial apporach to synthesize a library of copper complexes, associated with an activity-based screening to discover the first peptidyl di copper complex mimicking CAT redox chemistry. The selected dinuclear complex was studied in detail and characterized for its CAT activity i<i>n vitro</i> and in cells. Very interestingly, despite moderate intrinsic catalysis constant, this complex was efficacious in a cellular assay.<br>

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