scholarly journals Structural and spectroscopic investigations of nine-coordinate redox active lanthanide complexes with a pincer O,N,O ligand

2020 ◽  
Vol 49 (24) ◽  
pp. 8238-8246 ◽  
Author(s):  
D. Mouchel Dit Leguerrier ◽  
R. Barré ◽  
M. Bryden ◽  
D. Imbert ◽  
C. Philouze ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Radical Species ◽  
Spectroscopic Investigations ◽  
Redox Active

Three ligand molecules coordinate under their anionic diamagnetic form; the complexes (Gd, Eu, Yb, Lu) can undergo reversible oxidations, affording radical species, as demonstrated by spectro-electrochemistry.

Seven-coordinate lanthanide complexes with a tripodal redox active ligand: structural, electrochemical and spectroscopic investigations

2018 ◽  
Vol 47 (31) ◽  
pp. 10742-10751 ◽  
Author(s):  
Jennifer K. Molloy ◽  
Christian Philouze ◽  
Lionel Fedele ◽  
Daniel Imbert ◽  
Olivier Jarjayes ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Phenoxyl Radical ◽  
Radical Formation ◽  
Radical Species ◽  
Spectroscopic Investigations ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active

One-electron oxidation of the lanthanide complexes affords phenoxyl radical species. Radical formation is accompanied by a quenching of the metal-based luminescence.

Structural and spectroscopic investigations of redox active seven coordinate luminescent lanthanide complexes

2018 ◽  
Vol 483 ◽  
pp. 609-617 ◽  
Author(s):  
Jennifer K. Molloy ◽  
Lionel Fedele ◽  
Olivier Jarjayes ◽  
Christian Philouze ◽  
Daniel Imbert ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Spectroscopic Investigations ◽  
Redox Active

scholarly journals Lanthanide complexes of DOTA-nitroxide conjugates for redox imaging: Spectro-electrochemistry, CEST, relaxivity, and cytotoxicity.

2021 ◽  
Author(s):  
Damien Mouchel dit Leguerrier ◽  
Richard Barre ◽  
Quentin Ruet ◽  
Daniel Imbert ◽  
Christian Philouze ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Redox Active ◽  
Amide Derivatives ◽  
L1 And L2

The lanthanide(III) complexes (Gd, Eu, Dy, Yb) of DOTA tris(amide) and bis(amide) derivatives (L1 and L2) featuring one redox active TEMPO arm were prepared. Ligand L2 harbours an alkyne fragment...

Dioxygen-derived radicals in biological systems

1985 ◽  
Vol 311 (1152) ◽  
pp. 605-615 ◽  
Keyword(s):  
Respiratory Burst ◽  
Electrochemical Method ◽  
Culture Medium ◽  
Biological Systems ◽  
Cellular Systems ◽  
Superoxide Ion ◽  
Radical Species ◽  
Redox Active ◽  
Active Metal ◽  
Redox Active Metal

Three instances of the involvement of dioxygen-derived radicals in biological systems are considered. The first concerns the formation of radicals in the haemolytic reactions induced by treatment of erythrocytes by phenylhydrazine, as an example of the so-called ‘oxidant drugs’. The evidence for the formation of phenyl radicals is considered and their origin in the oxidation of phenylhydrazine by a ferryl derivative of haemoglobin postulated. The relevance to the formation of phenylated iron and porphyrin species is described. It is suspected that many instances of oxidative damage to cellular systems result from the coincidence of unsequestered redox-active metal ions (particularly those of iron and copper), reductants, and dioxygen. As an example, the damage to hepatocytes, grown in a culture medium containing cysteine, is described. The formation of radical species derived from dioxygen during the respiratory burst associated with phagocytosis is discussed. A new electrochemical method of detecting the superoxide ion produced during the respiratory burst is described. Particular emphasis is placed on the relation between the production of radical species such as the hydroxyl radical and the superoxide ion, and the extent of phagocytosis.

Coordination-driven assembly of a supramolecular square and oxidation to a tetra-ligand radical species

2019 ◽  
Vol 55 (43) ◽  
pp. 6082-6085 ◽  
Author(s):  
Khrystyna Herasymchuk ◽  
Jessica J. Miller ◽  
Gregory A. MacNeil ◽  
Ania S. Sergeenko ◽  
Declan McKearney ◽  
...  
Keyword(s):  
Radical Species ◽  
Design And Synthesis ◽  
Redox Active

The design and synthesis of a supramolecular square was achieved by coordination-driven assembly of redox-active nickel(ii) salen linkers and (ethylenediamine)palladium(ii) nodes.

scholarly journals In situ synthesis of lanthanide complexes supported by a ferrocene diamide ligand: extension to redox-active lanthanide ions

2015 ◽  
Vol 39 (10) ◽  
pp. 7696-7702 ◽  
Author(s):  
Wenliang Huang ◽  
Jonathan L. Brosmer ◽  
Paula L. Diaconescu
Keyword(s):  
Rare Earth ◽  
Lanthanide Complexes ◽  
In Situ Synthesis ◽  
Lanthanide Ions ◽  
Redox Active

The scope of an in situ method to prepare rare-earth alkyl and halide precursors was extended to cerium, praseodymium, samarium, terbium, thulium, and ytterbium.

scholarly journals Homoleptic Lanthanide Complexes Containing a Redox-Active Ligand and the Investigation of Their Electronic and Photophysical Properties

Inorganics ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 56
Author(s):  
Robin Taylor ◽  
Nico Bonanno ◽  
Mihaela Cibian ◽  
Jeetkia Yadav ◽  
Harlyn Silverstein ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Photophysical Properties ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active

scholarly journals Lanthanide complexes of spiropyran photoswitch and sensor: spectroscopic investigations and computational modelling

2018 ◽  
Vol 17 (2) ◽  
pp. 221-230 ◽  
Author(s):  
M. S. A. Abdel-Mottaleb ◽  
M. Saif ◽  
M. S. Attia ◽  
M. M. Abo-Aly ◽  
Sarah N. Mobarez
Keyword(s):  
Lanthanide Complexes ◽  
Computational Modelling ◽  
Spectroscopic Investigations

A number of novel lanthanide (Gd3+, Sm3+, and Tb3+) complexes of the 1′,3′-dihydro-8-methoxy-1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-(2H)-indole] (spiropyran; SP), a widely studied molecular photoswitch, were investigated.

Noncovalent immobilization and surface characterization of lanthanide complexes on carbon electrodes

2017 ◽  
Vol 46 (35) ◽  
pp. 11779-11789 ◽  
Author(s):  
Davide Lionetti ◽  
Victor W. Day ◽  
James D. Blakemore
Keyword(s):  
Lanthanide Complexes ◽  
Surface Characterization ◽  
Spectroscopic Characterization ◽  
Carbon Electrodes ◽  
Surface Immobilization ◽  
Redox Active

Surface immobilization and spectroscopic characterization of redox-active molecular lanthanide complexes is demonstrated on carbon electrodes.

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