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

Valence Bond Theory

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

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.

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

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...

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

You might also read

Related Articles

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

Sort by

Same author

Speciation of Silanol Groups on Commercial Precipitated Silicas via IR Spectroscopy.

Langmuir : the ACS journal of surfaces and colloids·2026

Same author

Structurally Encoded Mixed Proton-Electron Transport in Tetrathiafulvalene-Based Lanthanide MOFs.

Journal of the American Chemical Society·2026

Same author

Programming stacking order in conducting van der Waals metal-organic frameworks through ligand aggregation.

Nature chemistry·2026

Same author

Single-Crystalline, Semiconductive Layered Organic Cathode Powers High-Energy All-Solid-State Batteries.

ACS central science·2026

Same author

Evidence for an Electronically Driven Charge Density Wave in a 1D Metallic MOF.

ACS central science·2026

Same author

Methanol-Ethanol Discrimination and Selective Sensing Enabled by Molecular Sieving in Conductive MOFs.

Advanced materials (Deerfield Beach, Fla.)·2026

Search research articles

Related Experiment Video

Updated: Dec 29, 2025

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

Interdigitated conducting tetrathiafulvalene-based coordination networks.

Damien Bechu¹, Lilia S Xie, Nolwenn Le Breton

¹Université de Strasbourg, CNRS, CMC UMR 7140, Laboratoire de Tectonique Moléculaire, 4 rue Blaise Pascal, F-67000, Strasbourg, France. sbaudron@unistra.fr hosseini@unistra.fr.

Chemical Communications (Cambridge, England)

|January 30, 2020

Summary

Novel coordination polymers based on ethylenedithio-tetrathiafulvalene (EDT-TTF) derivatives exhibit a significant six-order-of-magnitude increase in electronic conductivity after iodine oxidation and radical generation.

More Related Videos

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Related Experiment Videos

Last Updated: Dec 29, 2025

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

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Area of Science:

Materials Science
Solid-State Chemistry
Coordination Chemistry

Background:

Ethylenedithio-tetrathiafulvalene (EDT-TTF) derivatives are known for their potential in molecular electronics.
Coordination polymers offer tunable electronic properties through metal-ligand interactions.

Purpose of the Study:

To synthesize and characterize novel 1D coordination polymers using a new EDT-TTF derivative.
To investigate the impact of surface oxidation on the electronic conductivity of these coordination polymers.

Main Methods:

Synthesis of a novel EDT-TTF derivative with 4-thiopyridyl groups.
Assembly of 1D coordination polymers with M(NCS)2 nodes (M = Fe, Co).
Characterization of structural and electronic properties, including conductivity measurements before and after iodine oxidation.

Main Results:

Two isostructural 1D coordination polymers were successfully synthesized.
A significant enhancement of electronic conductivity, by six orders of magnitude (from 10^-12 to 10^-6 S cm^-1), was observed.
This enhancement is attributed to surface oxidation and the generation of EDT-TTF-based radicals.

Conclusions:

The novel EDT-TTF-based coordination polymers demonstrate a remarkable increase in electronic conductivity.
Surface oxidation is an effective strategy to tune the electronic properties of these materials.
These findings highlight the potential of these materials for applications in molecular electronics and conductive materials.