Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Structural Isomerism

Structural 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...

Metal-Ligand Bonds

Metal-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...

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

Coordination Number and Geometry

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.

Stereoisomerism

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...

Thermal Electrocyclic Reactions: Stereochemistry

Thermal Electrocyclic Reactions: Stereochemistry

The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Tailoring Zn<sub>2</sub>SnO<sub>4</sub>inverse spinel via Co doping: enhanced two-electron water oxidation for efficient H<sub>2</sub>O<sub>2</sub>electrosynthesis.

Nanotechnology·2026

Same author

Electrospinning-constructed polysaccharide-based multilayer nanofiber composite membrane for bridging hemostasis and tissue repair.

Carbohydrate polymers·2026

Same author

LRRC46 regulates bovine granulosa cell functions via the COL8A1-mediated EGFR/PI3K/AKT signaling pathway.

Theriogenology·2026

Same author

Theory-Guided Synthesis of Stable Low-Nuclearity Cluster Catalysts via Atom-Stabilizer Locking.

Journal of the American Chemical Society·2026

Same author

Low-Transmission-Loss Optical Waveguide Devices of Polyimides with Trifluoromethoxy-Enhanced Ultrahigh Refractive Index for Short-Distance Optical Communication.

ACS applied materials & interfaces·2026

Same author

Stepwise Kinetics Promotion for High-Rate Aqueous Zn Metal Batteries.

Angewandte Chemie (International ed. in English)·2026

Search research articles

Related Experiment Video

Updated: Oct 15, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

Conductive One-Dimensional Coordination Polymers with Tunable Selectivity for the Oxygen Reduction Reaction.

Qian Zhao¹, Di Zhu¹, Xun Zhou¹

¹College of Chemical Engineering and Materials Science, College of Sciences, Tianjin University of Science & Technology, Tianjin 300457, P. R. China.

ACS Applied Materials & Interfaces

|October 27, 2021

Summary

New conductive coordination polymers (CPs) with M-S2N2 sites act as efficient electrocatalysts for the oxygen reduction reaction (ORR). Cobalt-based CPs show high ORR activity, while nickel-based CPs selectively produce H2O2.

Keywords:

conductive coordination polymer electrocatalyst one dimensional oxygen reduction reaction

More Related Videos

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Related Experiment Videos

Last Updated: Oct 15, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Nonprecious metal coordination complexes are gaining traction as electrocatalysts for the oxygen reduction reaction (ORR).
Developing efficient and selective ORR electrocatalysts is crucial for energy conversion technologies.

Purpose of the Study:

To report efficient ORR electrocatalysts based on one-dimensional (1D) coordination polymers (CPs) with tunable selectivity.
To explore the potential of M-S2N2 sites within conductive CPs for ORR applications.

Main Methods:

Synthesized 1D CPs from M(OAc)2 and 2,5-diamino-1,4-benzenedithiol (DABDT) using a solvent thermal method.
Investigated the electrical conductivity and electrocatalytic activity of the synthesized CPs for ORR in alkaline media.

Main Results:

The 1D CPs exhibited good electrical conductivities (10^-6–10^-2 S cm^-1), enabling their use as ORR catalysts without carbon additives.
Cobalt-based CPs displayed nanosheet structures with exposed Co-S2N2 sites, demonstrating remarkable ORR activity (E_onset = 0.93 V, E_1/2 = 0.82 V).
Nickel-based CPs facilitated a 2e- ORR pathway, achieving approximately 87% H2O2 selectivity with an E_onset of 0.78 V.

Conclusions:

Conductive nonprecious metal CPs with M-S2N2 sites offer a promising platform for designing tunable ORR electrocatalysts.
The study highlights the potential of these materials for efficient oxygen reduction and selective hydrogen peroxide production.