Sensitive electrochemiluminescence biosensor for glutathione using MnO2 nanoflower as novel co-reaction accelerator for Ru complex/tripropylamine system

2021 ◽  
pp. 339181
Author(s):  
Haijun Wang ◽  
Rui Zhang ◽  
Ying Zhuo ◽  
Ruo Yuan
Keyword(s):  
Ru Complex

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

Three-Phase Electrochemistry of a Highly Lipophilic Neutral Ru-Complex Having a Tridentate Bis(benzimidazolate)pyridine Ligand

2020 ◽  
Author(s):  
Vishwanath R.S ◽  
Masa-aki Haga ◽  
Takumi Watanabe ◽  
Emilia Witkowska Nery ◽  
Martin Jönsson-Niedziolka
Keyword(s):  
Redox Potential ◽  
Organic Phase ◽  
Electron Donor ◽  
Ion Transfer ◽  
Neutral Complex ◽  
Pyridine Ligand ◽  
Electrochemical Testing ◽  
Ru Complex ◽  
Three Phase ◽  
Exceptional Stability

Here we describe the synthesis and electrochemical testing of a heteroleptic bis(tridentate) ruthenium(II) complex [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> (LR =2,6-bis(1-(2-octyldodecan)benzimidazol-2-yl)pyridine, L = 2,6-bis(benzimidazolate)pyridine). It is a neutral complex which undergoes a quasireversible oxidation and reduction at relatively low potential. The newly synthetized compound was used for studies of ion-transfer at the three-phase junction because of the sensitivity of this method to cation expulsion. The [Ru<sup>II</sup>(LR)(L)]<sup>0</sup> shows exceptional stability during cycling and is sufficiently lipophilic even after oxidation to persist in the organic phase also using very hydrophilic anions such as Cl<sup>−</sup>. Given its low redox potential and strong lipophilicity this compound will be of interest as an electron donor in liquid-liquid electrochemistry.

The impact of bromine substitution on the photophysical properties of a homodinuclear Ru–tpphz–Ru complex

2011 ◽  
Vol 516 (1-3) ◽  
pp. 45-50 ◽  
Author(s):  
Christian Kuhnt ◽  
Michael Karnahl ◽  
Sven Rau ◽  
Michael Schmitt ◽  
Benjamin Dietzek ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Ru Complex ◽  
The Impact ◽  
Bromine Substitution

Sn,P-coordinated Ru cation: A robust catalyst for aerobic oxidations of benzylamine and benzyl alcohol

2021 ◽  
Author(s):  
Roman Jambor ◽  
Michal Aman ◽  
Libor Dostál ◽  
Aleš Růžička ◽  
Jiri Tydlitat ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Benzyl Alcohol ◽  
Ru Complex

A stable ionic Sn,P-coordinated Ru complex shows excellent catalytic activity in aerobic oxidations of benzylamine and benzyl alcohol. This complex is stabilized by a stannylene-phosphine peri-substituted naphthalene ligand, which can...

Ruthenium Complex Hydride Catalysts as a Platform for Ammonia Synthesis

2021 ◽  
Author(s):  
Qianru Wang ◽  
Jianping Guo ◽  
Ping Chen
Keyword(s):  
Alkaline Earth ◽  
Ammonia Synthesis ◽  
Ruthenium Complex ◽  
Earth Metal ◽  
Metal Catalyst ◽  
Alkaline Earth Metal ◽  
Dissociative Mechanism ◽  
Complex Hydride ◽  
Ru Complex ◽  
Scientific Goal

Mild-condition ammonia synthesis from N2 and H2 is a long-sought-after scientific goal and a practical need, especially for the intensively pursued “Green Ammonia” production using renewable H2. Under this context, there have been growing interests in the development of new catalysts for effectively catalyzing N2+H2 to NH3. Particular attention has been given to Ru-based catalysts because they are well known to be more active at lower temperatures and pressures than non-noble-metal based catalysts. Here, we demonstrate that a series of Ru complex hydrides An[RuHm], where A is alkali or alkaline earth metal, n= 2, 3 or 4 and m = 6 or 7, exhibit universal and high catalytic activities that far exceed the benchmark Ru metal catalysts under mild conditions. Detailed investigations on the ternary Ru complex hydride catalytic system disclose that the kinetic behaviors depend strongly on the identity of alkali or alkaline earth metal cations. In clear contrast to the closed packed Ru metal catalyst, the unique configuration and synergized scenario of the Ru complex hydride center prefer a non-dissociative mechanism for N2 activation and hydrogenation, which provides a new platform for the design and development of efficient NH3 synthesis catalysts.

scholarly journals In-Situ Probing of H2O Effects on a Ru-Complex Adsorbed on TiO2 Using Ambient Pressure Photoelectron Spectroscopy

2016 ◽  
Vol 59 (5-7) ◽  
pp. 583-590 ◽  
Author(s):  
Susanna K. Eriksson ◽  
Maria Hahlin ◽  
Stephanus Axnanda ◽  
Ethan Crumlin ◽  
Regan Wilks ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Ru Complex

scholarly journals Spectroscopic Study of the Interactions of Ruthenium-Ketoconazole Complexes of Known Antiparasitic Activity with Human Serum Albumin and Apotransferrin

2017 ◽  
Vol 57 (3) ◽  
Author(s):  
Jesús G. Estrada ◽  
Roberto A. Sánchez-Delgado
Keyword(s):  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Leishmania Major ◽  
Tryptophan Fluorescence ◽  
Ru Complex ◽  
Complex Protein ◽  
Number Of Binding Sites ◽  
Antiparasitic Drugs ◽  
Static Mechanism

The pharmacological properties of any drug are related to its ability to interact with macromolecular blood components. The interaction of human serum albumin (HSA) and apotransferrin (ATf) with six Ru<sup>II</sup> complexes containing ketoconazole (KTZ), which we have previously reported to be active against <em>Leishmania major</em> and <em>Trypanosoma cruzi</em>, has been investigated by monitoring the tryptophan fluorescence intensity of each protein upon incremental addition of the complexes. All the Ru-KTZ derivatives, namely <em>cis</em>-<em>fac</em>-[Ru<sup>II</sup>Cl<sub>2</sub>(DMSO)<sub>3</sub>(KTZ)] (<strong>1</strong>), <em>cis</em>-[Ru<sup>II</sup>Cl<sub>2</sub>(bipy)(DMSO)(KTZ)] (<strong>2</strong>), [Ru<sup>II</sup>(η6-<em>p</em>-cymene)Cl<sub>2</sub>(KTZ)] (<strong>3</strong>), [Ru<sup>II</sup>(η<sup>6</sup>-<em>p</em>-cymene)(en)(KTZ)][BF<sub>4</sub>]<sub>2</sub> (<strong>4</strong>), [Ru<sup>II</sup>(η<sup>6</sup>-<em>p</em>-cymene)(bipy)(KTZ)][BF<sub>4</sub>]<sub>2</sub> (<strong>5</strong>), and [Ru<sup>II</sup>(η<sup>6</sup>-<em>p</em>-cymene)(acac)(KTZ)][BF<sub>4</sub>] (<strong>6</strong>) are able to quench the intrinsic fluorescence of HSA and ATf at 27 ºC. Analysis of the spectroscopic data using Stern-Volmer plots indicates that in both cases the quenching takes place principally through a static mechanism involving the formation of Ru complex-protein adducts; further analysis of the fluorescence data allowed the estimation of apparent association constants and the number of binding sites for each protein and each compound. The results indicate that both HSA and ATf are possible effective transporters for Ru-KTZ antiparasitic drugs.

Sign in / Sign up

Export Citation Format

Share Document