Related Experiment Video
Updated: May 13, 2026
07:07
Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
Published on: March 12, 2015
Multi-center redox-active system: amine-amine electronic coupling through a cyclometalated bisruthenium segment
Chang-Jiang Yao1, Yu-Wu Zhong, Jiannian Yao
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Inorganic Chemistry
|March 20, 2013
Summary
Researchers created a novel redox-active molecule with a ruthenium bridge. This system shows electronic coupling between amine sites, enabling multi-step electronic changes and potential for new electronic materials.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Electrochemistry
Background:
- Development of advanced redox-active molecules is crucial for molecular electronics.
- Understanding electronic communication through bridging ligands is key for designing functional materials.
Purpose of the Study:
- To synthesize and characterize a novel linear N-Ru-Ru-N redox-active system.
- To investigate the electronic coupling between distal triarylamine sites bridged by a cyclometalated bisruthenium segment.
- To explore the electrochemical and spectroscopic properties of the synthesized system.
Main Methods:
- Multicenter synthesis and characterization.
- Single-crystal X-ray diffraction analysis.
- Electrochemical studies (cyclic voltammetry).
- UV-Vis-NIR absorption spectroscopy.
- Electron Paramagnetic Resonance (EPR) spectroscopy.
- Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT) calculations.
Main Results:
- Successful synthesis of a linear N-Ru-Ru-N system with a cyclometalated bisruthenium bridge.
- Observation of four distinct anodic redox waves, indicating electronic coupling between amine sites separated by 19.16 Å.
- Absence of amine-amine coupling when a noncyclometalated bisruthenium bridge was used.
- Four-step spectral changes in the visible to near-infrared region upon stepwise oxidation.
- Characterization of the singly oxidized state using EPR and DFT/TDDFT.
Conclusions:
- The cyclometalated bisruthenium segment effectively mediates electronic communication between distal triarylamine units.
- The synthesized molecule exhibits tunable redox properties and significant electronic coupling over a considerable distance.
- This work provides insights into the design of multi-redox-active systems for potential applications in molecular electronics and materials science.
More Related Videos
11:04Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
Published on: September 7, 2019
![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
11:44Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Related Concept Videos
01:23Redox Equilibria: Overview
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
01:24Redox Reactions
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
01:27Redox Reactions
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.