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

Colors and Magnetism

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...

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...

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...

You might also read

Related Articles

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

Sort by

Same author

Nanohybridization as a Route to a Water-Friendly Therapeutic Tool for Rescuing Misfolded Proteins.

ACS nanoscience Au·2026

Same author

Photocatalytic and Photo-Fenton Degradation Activity of Hierarchically Structured α-Fe<sub>2</sub>O<sub>3</sub>@Fe-CeO<sub>2</sub> and g-C<sub>3</sub>N<sub>4</sub> Composite.

International journal of molecular sciences·2026

Same author

Laser-generated X/In<sub>x</sub>O<sub>y</sub>/ZrO<sub>2</sub> (X = Ni, Cu) composite catalysts: influence of support structure and in loading on catalytic activity.

Scientific reports·2026

Same author

Plasmonic Nano-bolas Hunt DNA Targets.

ACS nanoscience Au·2026

Same author

Trimetallic Nanocomposites Grafted on Modified PET Substrate Revealing Antibacterial Effect Against <i>Escherichia coli</i>.

Molecules (Basel, Switzerland)·2025

Same author

Redox-Switchable Single-Atom Catalyst Enables Efficient Aqueous Hydroxymethylfurfural Oxidation.

ACS catalysis·2025

Search research articles

Related Experiment Video

Updated: Dec 17, 2025

Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters

Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters

Published on: August 22, 2014

Smart synthetic maghemite nanoparticles with unique surface properties encode binding specificity toward As^III.

Simone Molinari¹, Massimiliano Magro², Davide Baratella²

¹Department of Geosciences, University of Padua, via Gradenigo 6, 35131 Padova, Italy.

The Science of the Total Environment

|June 23, 2020

Summary

Surface active maghemite nanoparticles (SAMNs) selectively bind arsenite (AsIII) over arsenate (AsV) through distinct mechanisms. This discovery highlights SAMNs

Keywords:

Absorption specificity Arsenic Iron oxide Ligand binding Nanomaterial surface Nanoparticles

More Related Videos

Biofunctionalization of Magnetic Nanomaterials

Biofunctionalization of Magnetic Nanomaterials

Published on: July 16, 2020

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Published on: February 27, 2021

Related Experiment Videos

Last Updated: Dec 17, 2025

Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters

Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters

Published on: August 22, 2014

Biofunctionalization of Magnetic Nanomaterials

Biofunctionalization of Magnetic Nanomaterials

Published on: July 16, 2020

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Published on: February 27, 2021

Area of Science:

Materials Science
Environmental Chemistry
Nanotechnology

Background:

Surface active maghemite nanoparticles (SAMNs) exhibit unique colloidal stability and binding capabilities.
Understanding nanoparticle-surface interactions is crucial for environmental remediation applications.
Arsenic contamination in water poses significant health risks, necessitating effective removal strategies.

Purpose of the Study:

To comparatively investigate the binding interactions of SAMNs with arsenate (AsV) and arsenite (AsIII).
To elucidate the distinct binding modalities and surface chemistry involved in SAMN-arsenic complex formation.
To assess the potential of SAMNs for arsenic remediation in contaminated water.

Main Methods:

Thermodynamic and kinetic characterizations of SAMN@As complexes.
Chemical and structural analysis of SAMN@As complexes.
Comparative study of AsV and AsIII interactions with SAMNs.

Main Results:

SAMNs demonstrated selective and specific binding for arsenite (AsIII) compared to arsenate (AsV).
Arsenite exclusively binds via inner-sphere coordination, while arsenate exhibits both inner- and outer-sphere complexation.
This discrimination capability between AsIII and AsV by maghemite nanoparticles is unprecedented.

Conclusions:

The synthetic route significantly influences the surface properties and binding behavior of maghemite nanoparticles.
SAMNs show potential for selective removal of arsenite, the more toxic arsenic species in water.
This research advances the understanding of nanosized iron oxide chemistry and its environmental applications.