Axial Ligand Effects on the Redox Reactions of Manganese Porphyrins

1999 ◽  
Vol 46 (2) ◽  
pp. 221-227 ◽  
Author(s):  
Chi-Hong Chang ◽  
Shu-Hua Cheng ◽  
Y. Oliver Su
Keyword(s):  
Redox Reactions ◽  
Axial Ligand ◽  
Manganese Porphyrins ◽  
Ligand Effects

Manganese(III) and manganese(IV) corroles: synthesis, spectroscopic, electrochemical and X-ray structural characterization

2005 ◽  
Vol 09 (06) ◽  
pp. 398-412 ◽  
Author(s):  
Zhongping Ou ◽  
Christoph Erben ◽  
Marie Autret ◽  
Stefan Will ◽  
Daniel Rosen ◽  
...  
Keyword(s):  
Redox Reactions ◽  
Esr Spectroscopy ◽  
Spectroscopic Characterization ◽  
Axial Ligand ◽  
X Ray Diffraction ◽  
Nonaqueous Media ◽  
X Ray ◽  
Cation Radicals ◽  
Uv Visible ◽  
Electron Reduction

The synthesis, spectroscopic characterization and electrochemistry of four Mn(III) and Mn(IV) octaethylcorroles are reported and the potentials of the Mn(III) / Mn(IV) and Mn(IV) / Mn(III) processes examined as a function of the axial ligand. The investigated compounds are represented as ( OEC ) Mn , ( OEC ) MnCl , ( OEC ) Mn ( py ) and ( OEC ) Mn ( C 6 H 5) where OEC is the trianion of octaethylcorrole. The first one-electron oxidation of ( OEC ) Mn III and ( OEC ) Mn III ( py ) in PhCN or pyridine containing 0.1 M TBAP leads to the facile formation of a Mn(IV) species while the first one-electron reduction of ( OEC ) Mn IV Cl and ( OEC ) Mn IV ( C 6 H 5) in the same two solvents leads to the Mn(III) corrole. All other redox reactions occur at the corrole macrocycle to give π-cation radicals or π-anion radicals and there is no evidence for electrogeneration of a compound with a Mn(II) oxidation state as is the case for manganese(III) porphyrins which are all easily reduced to the Mn(II) state in nonaqueous media. The products of each Mn(III)/Mn(IV) redox reaction were characterized by UV-visible and/or ESR spectroscopy and the structures of ( OEC ) MnCl , ( OEC ) Mn ( py ) and ( OEC ) Mn ( C 6 H 5) were determined by single-crystal X-ray diffraction.

scholarly journals Axial Ligand Effects on the Geometric and Electronic Structures of Nonheme Oxoiron(IV) Complexes

2008 ◽  
Vol 130 (37) ◽  
pp. 12394-12407 ◽  
Author(s):  
Timothy A. Jackson ◽  
Jan-Uwe Rohde ◽  
Mi Sook Seo ◽  
Chivukula V. Sastri ◽  
Raymond DeHont ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Axial Ligand ◽  
Ligand Effects

Axial Ligand Effects on the Structures of Self-Assembled Gallium–Porphyrin Monolayers on Highly Oriented Pyrolytic Graphite

Langmuir ◽  
2016 ◽  
Vol 32 (2) ◽  
pp. 487-495 ◽  
Author(s):  
Judith M. Kamm ◽  
Cameron P. Iverson ◽  
Wing-Yeung Lau ◽  
Michael D. Hopkins
Keyword(s):  
Pyrolytic Graphite ◽  
Axial Ligand ◽  
Highly Oriented Pyrolytic Graphite ◽  
Ligand Effects ◽  
Self Assembled
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