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

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.

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...

You might also read

Related Articles

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

Sort by

Same author

Multivalent Probes in Molecular Imaging: Reality or Future?

Trends in molecular medicine·2021

Same author

Visible-Light-Driven Rotation of Molecular Motors in Discrete Supramolecular Metallacycles.

Journal of the American Chemical Society·2020

Same author

A coating from nature.

Science advances·2020

Same author

Cross-coupling of [<sup>11</sup>C]methyllithium for <sup>11</sup>C-labelled PET tracer synthesis.

Chemical communications (Cambridge, England)·2020

Same author

Controlled Diffusion of Photoswitchable Receptors by Binding Anti-electrostatic Hydrogen-Bonded Phosphate Oligomers.

Journal of the American Chemical Society·2020

Same author

Cooperative and synchronized rotation in motorized porous frameworks: impact on local and global transport properties of confined fluids.

Faraday discussions·2020

Search research articles

Related Experiment Video

Updated: Jun 24, 2026

Creating Two-Dimensional Patterned Substrates for Protein and Cell Confinement

Creating Two-Dimensional Patterned Substrates for Protein and Cell Confinement

Published on: September 6, 2011

Two-dimensional molecular patterning by surface-enhanced Zn-porphyrin coordination.

Johan Visser¹, Nathalie Katsonis, Javier Vicario

¹Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

Langmuir : the ACS Journal of Surfaces and Colloids

|April 4, 2009

Summary

Zinc-5,10,15,20-meso-tetradodecylporphyrins (Zn-TDPs) self-assemble into organized arrays on graphite surfaces. Coordinated Zn-TDPs show increased adsorption on highly oriented pyrolytic graphite (HOPG) due to enhanced ligand binding at the liquid/solid interface.

More Related Videos

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

Related Experiment Videos

Last Updated: Jun 24, 2026

Creating Two-Dimensional Patterned Substrates for Protein and Cell Confinement

Creating Two-Dimensional Patterned Substrates for Protein and Cell Confinement

Published on: September 6, 2011

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

Area of Science:

Materials Science
Supramolecular Chemistry
Surface Science

Background:

Zinc-5,10,15,20-meso-tetradodecylporphyrins (Zn-TDPs) are molecules with potential for self-assembly.
Understanding molecular self-assembly on surfaces is crucial for developing advanced materials.
The interaction of porphyrins with surfaces and ligands influences their organizational behavior.

Purpose of the Study:

To investigate the self-assembly of Zn-TDPs on graphite surfaces.
To explore the role of ligand coordination (3-nitropyridine) in Zn-TDP adsorption.
To analyze the formation of 2D molecular patterns and their stability.

Main Methods:

Preparation of Zn-TDP solutions with varying 3-nitropyridine concentrations.
Deposition of solutions onto highly oriented pyrolytic graphite (HOPG).
Scanning Tunneling Microscopy (STM) measurements at the liquid-solid interface.

Main Results:

Zn-TDPs form stable, organized arrays on graphite surfaces, creating molecular patterns.
Zn-TDPs coordinated with 3-nitropyridine exhibit enhanced adsorption on HOPG compared to non-coordinated ones.
The ratio of coordinated to non-coordinated Zn-TDPs is higher at the n-tetradecane/HOPG interface than in solution, indicating preferential binding.

Conclusions:

Zn-TDPs can form ordered structures on graphite surfaces.
Ligand coordination significantly enhances the adsorption of Zn-TDPs onto HOPG.
The liquid-solid interface promotes stronger binding of axial ligands to physisorbed Zn-TDPs, facilitating organized molecular assembly.