Ring size matters: supramolecular isomerism in self-assembled redox-active tetra- and hexaruthenium macrocycles

2020 ◽  
Vol 56 (7) ◽  
pp. 1062-1065 ◽  
Author(s):  
Daniel Fink ◽  
Nicole Orth ◽  
Michael Linseis ◽  
Ivana Ivanović-Burmazović ◽  
Rainer F. Winter
Keyword(s):  
Redox Properties ◽  
Molecular Structures ◽  
Ring Size ◽  
Supramolecular Isomerism ◽  
Redox Active ◽  
Self Assembled ◽  
Selective Formation

The selective formation of a kinetically stable metallamacrocyclic hexaruthenium complex and its clean conversion into a thermodynamically more stable tetraruthenium isomer as well their molecular structures and redox properties are reported.

scholarly journals Effects of Chemically-Modified Polypyridyl Ligands on the Structural and Redox Properties of Tricarbonylmanganese(I) Complexes

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5921
Author(s):  
Takatoshi Kanno ◽  
Tsugiko Takase ◽  
Dai Oyama
Keyword(s):  
Methyl Viologen ◽  
Structural Parameters ◽  
Electrochemical Analysis ◽  
Redox Properties ◽  
Molecular Structures ◽  
Central Metal ◽  
Carbonyl Complexes ◽  
Polypyridyl Ligands ◽  
Chemically Modified ◽  
Redox Active

Carbonyl complexes with manganese(I) as the central metal are very attractive catalysts. The introduction of redox-active ligands, such as quinones and methyl viologen analogs into these catalysts, would be expected to lead to superior catalyst performances, since they can function as excellent electron carriers. In this study, we synthesized four tricarbonylmanganese(I) complexes containing typical bidentate polypyridyl ligands, including 1,10-phenanthroline (phen) and 2,2′-bipyridine (bpy) frameworks bound to redox-active ortho-quinone/catechol or methyl viologen-like units. The molecular structures of the resulting complexes were determined by X-ray crystallography to clarify their steric features. As expected from the infrared (IR) data, three CO ligands for each complex were coordinated in the facial configuration around the central manganese(I) atom. Additionally, the structural parameters were found to differ significantly between the quinone/catechol units. Electrochemical analysis revealed some differences between them and their reference complexes, namely [MnBr(CO)3(phen)] and [MnBr(CO)3(bpy)]. Notably, interconversions induced by two-electron/two-proton transfers between the quinone and catechol units were observed in the phenanthroline-based complexes. This work indicated that the structural and redox properties in tricarbonylmanganese(I) complexes were significantly affected by chemically modified polypyridyl ligands. A better understanding of structures and redox behaviors of the present compounds would facilitate the design of new manganese complexes with enhanced properties.

scholarly journals Exciton Fine-Structure Splitting in Self-Assembled Lateral InAs/GaAs Quantum-Dot Molecular Structures

ACS Nano ◽  
2015 ◽  
Vol 9 (6) ◽  
pp. 5741-5749 ◽  
Author(s):  
Stanislav Fillipov ◽  
Yuttapoom Puttisong ◽  
Yuqing Huang ◽  
Irina A. Buyanova ◽  
Suwaree Suraprapapich ◽  
...  
Keyword(s):  
Fine Structure ◽  
Quantum Dot ◽  
Molecular Structures ◽  
Fine Structure Splitting ◽  
Structure Splitting ◽  
Self Assembled ◽  
Gaas Quantum Dot

Exciton Coupling in Redox‐Active Salen based Self‐Assembled Metallacycles

2021 ◽  
Author(s):  
Khrystyna Herasymchuk ◽  
Magali Allain ◽  
Gregory A. MacNeil ◽  
Vincent Carré ◽  
Frédéric Aubriet ◽  
...  
Keyword(s):  
Exciton Coupling ◽  
Redox Active ◽  
Self Assembled

Synthesis, Characterization, Investigation of Capacitance and Redox Properties of Self-assembled Phe-Phe with Ferrocene Conjugates

2021 ◽  
Author(s):  
Om Shanker Tiwari
Keyword(s):  
Nucleic Acid ◽  
Electrochemical Properties ◽  
Self Assembly ◽  
Peptide Nucleic Acid ◽  
Redox Properties ◽  
Self Assembled ◽  
Acid Unit

The synthesis, nanostructure self-assembly and electrochemical properties of a series of ferrocene conjugated peptides derived from the dipeptide Phe-Phe, nucleoside and the peptide nucleic acid unit which are covalently attached...

scholarly journals Thermally tunable selective formation of self-assembled fibers into two orthogonal directions in oriented liquid-crystalline smectic templates

2020 ◽  
Vol 56 (69) ◽  
pp. 9954-9957
Author(s):  
Daisuke Yamaguchi ◽  
Yuka Ikemoto ◽  
Takashi Kato
Keyword(s):  
Molecular Weight ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Layered Structures ◽  
Low Molecular Weight ◽  
Smectic A ◽  
Orthogonal Grid ◽  
Self Assembled ◽  
Low Molecular Weight Gelators ◽  
Selective Formation

Two orthogonal (grid-like) and one directional fibrous structures are selectively formed through anisotropic self-assembly of low-molecular-weight gelators in liquid-crystalline smectic A templates depending on thermally tuned layered structures.

scholarly journals Structural Versatility and Supramolecular Isomerism in Redox-Active Tetra- and Hexaruthenium Macrocycles

2020 ◽  
Vol 2020 (29) ◽  
pp. 2816-2829 ◽  
Author(s):  
Daniel Fink ◽  
Nicole Orth ◽  
Michael Linseis ◽  
Ivana Ivanović-Burmazović ◽  
Rainer F. Winter
Keyword(s):  
Supramolecular Isomerism ◽  
Redox Active ◽  
Structural Versatility
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