Association of ruthenium complexes [Ru(bpy)3]2+ or [Ru(bpy)2(Mebpy-py)]2+ with Dawson polyanions α-[P2W18O62]6– or α2-[FeIII(H2O)P2W17O61]7–

2008 ◽  
Vol 86 (11) ◽  
pp. 1034-1043 ◽  
Author(s):  
L Ruhlmann ◽  
C Costa-Coquelard ◽  
J Hao ◽  
S Jiang ◽  
C He ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Steady State ◽  
Nmr Spectroscopy ◽  
Electrochemical Properties ◽  
Ruthenium Complex ◽  
Ruthenium Complexes ◽  
Association Constants ◽  
Luminescence Spectroscopy ◽  
Steady State Absorption

The formation of electrostatically linked complexes between [Ru(bpy)3]Cl2 or [Ru(bpy)2(Mebpy-py)](PF6)2 and (TBA)6α-[P2W18O62] or (TBA)5K2α2-[FeIII(H2O)P2W17O61] in solution were studied by steady-state absorption and luminescence spectroscopy. The stoichiometry and global association constants of the formed complexes were obtained by the Job method. The formed complexes were characterized by 1H and 31P NMR spectroscopy and their electrochemical properties compared to the precursor compounds were investigated by using the cyclic voltammetry method.Key words: electrochemistry, polyoxometalate, ruthenium complex, electrostatic complex.

Synthesis and electrochemical properties of bimetallic η5-indenyl ruthenium complexes

2009 ◽  
Vol 87 (1) ◽  
pp. 134-138 ◽  
Author(s):  
Quan Yuan Hu ◽  
Guochen Jia
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Electronic Communication ◽  
Ruthenium Complexes ◽  
Hydride Complex

Treatment of RuCl(dppm)(η5-C9H7) with alkynes HC≡C(C6H4)nC≡CH (n = 1, 2) in the presence of TlPF6 and t-BuONa affords the bimetallic ruthenium acetylide complexes [(η5-C9H7)(dppm)Ru]2(µ-C≡C(C6H4)nC≡C). Reactions of the hydride complex RuH(dppm)(η5-C9H7) with HC≡C(C6H4)nC≡CH (n = 1, 2) in refluxing toluene give the bimetallic ruthenium alkenyl complexes [(η5-C9H7)(dppm)Ru]2(µ-CH=CH(C6H4)nCH=CH). The electrochemical properties of the new complexes have been investigated by cyclic voltammetry, which reveals that the organic spacer –CH=CHC6H4CH=CH– is more effective than –C≡CC6H4C≡C– in mediating electronic communication between the two ruthenium moieties.Key words: ruthenium, bimetallic, acetylide, insertion, electrochemistry.

Spectroscopic and Electrochemical Study of a Tetrapyridylporphyrin Modified with Four Bis-(1,10-phenanthroline)chlororuthenium(II) Complexes

1998 ◽  
Vol 02 (06) ◽  
pp. 467-472 ◽  
Author(s):  
KOITI ARAKI ◽  
ADRIANO L. ARAÚJO ◽  
MARCOS M. TOYAMA ◽  
MARCELO FRANCO ◽  
CARLA M. N. AZEVEDO ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Modified Electrodes ◽  
Electrochemical Study ◽  
Luminescence Spectroscopy ◽  
Molecular Films ◽  
Solid Electrodes ◽  
The Stability ◽  
Phenanthroline Ligands ◽  
Cosy Nmr

A new modified tetrapyridylporphyrin symmetrically coordinated to four [ Ru ( phen )2 Cl ]+ groups has been synthesized and its structural and electrochemical properties have been investigated by means of 1 H and COSY NMR, UV-vis and luminescence spectroscopy, cyclic voltammetry and spectroelectrochemistry. The presence of the phenanthroline ligands has improved the stability of the molecular films generated on the surface of conventional solid electrodes in comparison with the analogous bipyridine derivative. The performance of the modified electrodes has been evaluated for the detection of dopamine, with excellent results.

scholarly journals Effect of Deposition Parameters on Electrochemical Properties of Polypyrrole-Graphene Oxide Films

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 624 ◽  
Author(s):  
Alina Iuliana Pruna ◽  
Nelly Ma. Rosas-Laverde ◽  
David Busquets Mataix
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Electrochemical Properties ◽  
Sodium Dodecyl ◽  
Hybrid Coatings ◽  
Deposition Parameters ◽  
Structure Morphology ◽  
Energy Storage Applications ◽  
Improved Performance ◽  
Sds Surfactant

Graphene oxide (GO)-modified polypyrrole (PPy) coatings were obtained by electrochemical methods in the presence of the anionic surfactant, sodium dodecyl sulfate (SDS). The structure, morphology, and electrochemical properties of the coatings were assessed by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and cyclic voltammetry at varying scan rates, respectively. The properties of the obtained coatings were analyzed with the GO and PPy loadings and electrodeposition mode. The hybrid coatings obtained galvanostatically showed a coarser appearance than those deposited by cyclic voltammetry CV mode and improved performance, respectively, which was further enhanced by GO and PPy loading. The capacitance enhancement can be attributed to the SDS surfactant that well dispersed the GO sheets, thus allowing the use of lower GO content for improved contribution, while the choice of suitable electrodeposition parameters is highly important for improving the applicability of GO-modified PPy coatings in energy storage applications.

Preparation and Electrochemical Properties of LaMnO3 Powder as a Supercapacitor Electrode Material

2017 ◽  
Vol 727 ◽  
pp. 698-704 ◽  
Author(s):  
Xian Wei Wang ◽  
Xiao Er Wang ◽  
Hui Chao Zhang ◽  
Qian Qian Zhu ◽  
Dong Li Zheng ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Raw Materials ◽  
Sol Gel ◽  
Galvanostatic Charge ◽  
Supercapacitor Electrode ◽  
Lanthanum Manganate ◽  
Pure Phase ◽  
Charge Discharge

The structural and electrochemical properties of lanthanum manganate (LaMnO3) powder prepared by the sol-gel method are researched in this article. The powder calcined at 600 °C showed amorphous, and the powder calcined at 700-800 °C showed the pure phase of the LaMnO3. The grains with the size of about 80-120 nm were agglomerating together. Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical properties in alkaline environment. The electrochemical properties calcined at 700 °C showed a specific capacitance of 73 F/g at the current density of 0.5 A/g. The raw materials for preparing the LaMnO3 powder are cheap, and the operation method is simple.

A selenium-containing ruthenium complex as a cancer radiosensitizer, rational design and the important role of ROS-mediated signalling

2015 ◽  
Vol 51 (13) ◽  
pp. 2637-2640 ◽  
Author(s):  
Zhiqin Deng ◽  
Lianling Yu ◽  
Wenqiang Cao ◽  
Wenjie Zheng ◽  
Tianfeng Chen
Keyword(s):  
Rational Design ◽  
Ruthenium Complex ◽  
Ruthenium Complexes

We have described the rational design of selenium-containing ruthenium complexes and their use as cancer radiosensitizers through regulating ROS-mediated pathways.

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