scholarly journals Redox active dendronized polystyrenes equipped with peripheral triarylamines

2014 ◽  
Vol 10 ◽  
pp. 3097-3103 ◽  
Author(s):  
Toshiki Nokami ◽  
Naoki Musya ◽  
Tatsuya Morofuji ◽  
Keiji Takeda ◽  
Masahiro Takumi ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Redox Active ◽  
Reversible Redox ◽  
Palladium Catalyzed

Dendronized polystyrene having peripheral bromo groups was prepared from the dendronization of unfunctionalized polystyrene with dendritic diarylcarbenium ions bearing peripheral bromo groups using the “cation pool” method. The palladium-catalyzed amination of the peripheral bromo groups with diarylamine gave dendronized polystyrene equipped with peripheral triarylamines, which exhibited two sets of reversible redox peaks in the cyclic voltammetry curves.

scholarly journals Drawing on biology to inspire molecular design: a redox-responsive MRI probe based on Gd(iii)-nicotinamide

2018 ◽  
Vol 54 (92) ◽  
pp. 12986-12989 ◽  
Author(s):  
Michael Harris ◽  
Jacek L. Kolanowski ◽  
Edward S. O’Neill ◽  
Céline Henoumont ◽  
Sophie Laurent ◽  
...  
Keyword(s):  
Molecular Design ◽  
Biologically Inspired ◽  
Redox Active ◽  
Reversible Redox ◽  
Redox Responsive ◽  
Redox Switch

A novel, reversible redox-active MRI probe, GdNR1, has been developed based on the biologically-inspired nicotinimidium redox switch.

scholarly journals Interactions between tetrathiafulvalene units in dimeric structures – the influence of cyclic cores

2015 ◽  
Vol 11 ◽  
pp. 930-948 ◽  
Author(s):  
Huixin Jiang ◽  
Virginia Mazzanti ◽  
Christian R Parker ◽  
Søren Lindbæk Broman ◽  
Jens Heide Wallberg ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Coupling Reactions ◽  
Double Bonds ◽  
Redox Active ◽  
Metal Catalyzed ◽  
Selection Of

A selection of cyclic and acyclic acetylenic scaffolds bearing two tetrathiafulvalene (TTF) units was prepared by different metal-catalyzed coupling reactions. The bridge separating the two TTF units was systematically changed from linearly conjugated ethyne, butadiyne and tetraethynylethene (trans-substituted) units to a cross-conjugated tetraethynylethene unit, placed in either acyclic or cyclic arrangements. The cyclic structures correspond to so-called radiaannulenes having both endo- and exocyclic double bonds. Interactions between two redox-active TTF units in these molecules were investigated by cyclic voltammetry, UV–vis–NIR and EPR absorption spectroscopical methods of the electrochemically generated oxidized species. The electron-accepting properties of the acetylenic cores were also investigated electrochemically.

scholarly journals Donor Acceptor Copolymers from Cyclopentannulation Polymerizations with Dicyclopenta[cd,jk]pyrene and Dicyclopenta[cd,lm]perylene Acceptors

2020 ◽  
Author(s):  
Ain Uddin ◽  
Kyle Plunkett
Keyword(s):  
Thin Film ◽  
Cyclic Voltammetry ◽  
Light Absorption ◽  
Visible Region ◽  
Optoelectronic Properties ◽  
Band Gaps ◽  
Molecular Weights ◽  
Palladium Catalyzed ◽  
Donor Acceptor ◽  
Film Absorption

A series of donor-acceptor copolymers with dicyclopenta[cd,jk]pyrene and dicyclopenta[cd,lm]perylene acceptor units was prepared via palladium catalyzed cyclopenta-annulation reactions. The acceptor units were paired with diethynyl containing donor groups based on benzo[1,2-b:4,5-b']dithiophene, thieno[3,2-b]thiophene, and 4-octyl-4H-dithieno[3,2-b:2',3'-d]pyrrole to create six polymer variants. The cyclopentannulation polymerization resulted in copolymers with molecular weights (Mn) of 6-14 kDa and broad light absorption in the visible region with band gaps of 1.38-1.85 eV. The synthetic methodology, as well as optoelectronic properties, including thin-film absorption and cyclic voltammetry, of the donor-acceptor copolymers are presented.<br> <br><br>

scholarly journals Complexes of Cobalt(II) Iodide with Pyridine and Redox Active 1,2-Bis(arylimino)acenaphthene: Synthesis, Structure, Electrochemical, and Single Ion Magnet Properties

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2054 ◽  
Author(s):  
Dmitriy S. Yambulatov ◽  
Stanislav A. Nikolaevskii ◽  
Mikhail A. Kiskin ◽  
Tatiana V. Magdesieva ◽  
Oleg A. Levitskiy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cyclic Voltammetry ◽  
External Magnetic Field ◽  
Electrochemical Behavior ◽  
Complex I ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Redox Active ◽  
Tetrahedral Environment

Complexes [(dpp-BIAN)0CoIII2]·MeCN (I) and [(Py)2CoI2] (II) were synthesized by the reaction between cobalt(II) iodide and 1,2-bis(2,6-diisopropylphenylimino)acenaphthene (dpp-BIAN) or pyridine (Py), respectively. The molecular structures of the complexes were determined by X-ray diffraction. The Co(II) ions in both compounds are in a distorted tetrahedral environment (CoN2I2). The electrochemical behavior of complex I was studied by cyclic voltammetry. Magnetochemical measurements revealed that when an external magnetic field is applied, both compounds exhibit the properties of field-induced single ion magnets.

Aminotroponiminates: ligand-centred, reversible redox events under oxidative conditions in sodium and bismuth complexes

2018 ◽  
Vol 47 (31) ◽  
pp. 10578-10589 ◽  
Author(s):  
Anna Hanft ◽  
Crispin Lichtenberg
Keyword(s):  
Redox Active ◽  
Reversible Redox

Redox-active bismuth complexes based on a new aminotroponiminate ligand with ferrocenyl substituents have been synthesised and characterised.

scholarly journals Reversible multi-electron storage in dual-site redox-active supramolecular cages

2019 ◽  
Vol 55 (84) ◽  
pp. 12619-12622 ◽  
Author(s):  
Raoul Plessius ◽  
Nicole Orth ◽  
Ivana Ivanović-Burmazović ◽  
Maxime A. Siegler ◽  
Joost N. H. Reek ◽  
...  
Keyword(s):  
Electron Storage ◽  
Charged Species ◽  
Redox Active ◽  
Reversible Redox ◽  
Dual Site

Redox-active M6L4 cages display multiple reversible redox-events, enabling switching from overall +12 to −4 charged species with reversible storage of 16 electrons.

Towards Multifunctional Materials Incorporating Elastomers and Reversible Redox-Active Fragments

2014 ◽  
Vol 20 (48) ◽  
pp. 15808-15815 ◽  
Author(s):  
Màrius Tarrés ◽  
Clara Viñas ◽  
Ana M. Cioran ◽  
Mikko M. Hänninen ◽  
Reijo Sillanpää ◽  
...  
Keyword(s):  
Multifunctional Materials ◽  
Redox Active ◽  
Reversible Redox ◽  
Active Fragments

Synthesis and Photoelectric Properties of a Novel Polymerizable Perylene Diimide Electron Acceptor Material

2013 ◽  
Vol 651 ◽  
pp. 97-102
Author(s):  
Si Li Yi ◽  
Qing Xu
Keyword(s):  
Cyclic Voltammetry ◽  
1H Nmr ◽  
Electron Acceptor ◽  
Perylene Diimide ◽  
Absorption Bands ◽  
Broad Absorption ◽  
Chemical Structures ◽  
Photoelectric Properties ◽  
Reversible Redox ◽  
Ft Ir

A novel polymerizable perylene diimide electron acceptor 1,7-bis(N,N-bis(4-methoxy phenyl)aniline)-N-(3-(2-ethylhexoxy)propylamide)-N-hexyl-perylene diimide acrylate (PDA) have been synthesized, and the chemical structures are confirmed by 1H NMR and FT-IR. The PDA shows broad absorption bands in 400–850 nm, and the optical bandgap is calculated to be 1.45 eV. Cyclic voltammetry results confirm that PDA display a couple of reversible redox peaks, the LUMO and HOMO levels of PDA were calculated as -3.82 eV and -5.16 eV, respectively.

A redox-active 2D covalent organic framework with pyridine moieties capable of faradaic energy storage

2016 ◽  
Vol 4 (42) ◽  
pp. 16312-16317 ◽  
Author(s):  
Abdul Muqsit Khattak ◽  
Zahid Ali Ghazi ◽  
Bin Liang ◽  
Niaz Ali Khan ◽  
Azhar Iqbal ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Redox Reaction ◽  
Covalent Organic Framework ◽  
Redox Active ◽  
Reversible Redox ◽  
Organic Framework

A redox active pyridine based covalent organic framework was synthesized and used as an electrode in faradaic supercapacitors. The pyridine units in the DAP-COF undergo a reversible redox reaction, leading to an increase in specific capacitance relative to both its electroactive monomer and a COF lacking redox-active groups.

scholarly journals An Improved Route to Osmium(IV) Tetraaryl Complexes

2020 ◽  
Author(s):  
Joseph Parr ◽  
Ralf Haiges ◽  
Michael Inkpen
Keyword(s):  
The Novel ◽  
Tetrahedral Geometry ◽  
Distorted Tetrahedral Geometry ◽  
Redox Active ◽  
Reversible Redox ◽  
First Time

<p>Air-stable, redox-active osmium(IV) tetraaryl complexes can be prepared in yields ≤76% from the novel precursor (Oct<sub>4</sub>N)<sub>2</sub>[OsBr<sub>6</sub>], facilitating the synthesis of Os(mesityl)<sub>4 </sub>for the first time. This complex exhibits a distorted tetrahedral geometry and three reversible redox events including a 1+/2+ feature not previously observed in this family of materials.</p>

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