Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

22.2K
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...
22.2K
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

1.4K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
1.4K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

739
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
739
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.4K
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...
28.4K
Formation of Complex Ions03:45

Formation of Complex Ions

24.4K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.4K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

538
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
538

You might also read

Related Articles

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

Sort by
Same author

A single freeze cycle redirects iron mineral transformation.

Science (New York, N.Y.)·2026
Same author

Effects of Iron-Organic Matter Colloids on Transport of Rare Earth Elements in Saturated Porous Medium.

Environmental science & technology·2026
Same author

Stabilization of U(V) and U(VI) in Goethite Formed by Recrystallization of Fe-Oxyhydroxysulfates.

Environmental science & technology·2026
Same author

Ice amplifies ligand-controlled mineral dissolution in microscale hot spots.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Investigations of Co(II) to Co(III) oxidation mechanisms at Fe<sub>3-<i>δ</i></sub>O<sub>4</sub> nanoparticle surfaces.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Elucidating the Geochemical Dynamics of Arsenite and Pyrite in Aquatic Systems.

Environmental science & technology·2025

Related Experiment Video

Updated: Oct 15, 2025

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
11:47

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

Published on: July 4, 2017

13.6K

Competitive Carboxylate-Silicate Binding at Iron Oxyhydroxide Surfaces.

Wei Cheng1, Rémi Marsac2, Khalil Hanna3,4

  • 1College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, P.R. China.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 29, 2021
PubMed
Summary

Dissolved silicate ions in soils can displace organic contaminants like phthalic acid (PA) from mineral surfaces. Higher silicate concentrations and longer reaction times promote silicate binding, reducing organic contaminant loading.

More Related Videos

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

9.7K
Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
09:34

Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties

Published on: November 15, 2016

9.3K

Related Experiment Videos

Last Updated: Oct 15, 2025

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
11:47

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

Published on: July 4, 2017

13.6K
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

9.7K
Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
09:34

Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties

Published on: November 15, 2016

9.3K

Area of Science:

  • Environmental Chemistry
  • Soil Science
  • Surface Chemistry

Background:

  • Dissolved silicate ions influence organic contaminant fate in soils through competitive binding.
  • Limited understanding exists regarding silicate-organic binding dynamics under various conditions and time scales.

Purpose of the Study:

  • Investigate competitive binding between silicate and phthalic acid (PA) on goethite.
  • Determine the impact of solution conditions and time on silicate-organic interactions.

Main Methods:

  • Batch adsorption experiments with goethite, silicate, and PA.
  • Surface complexation thermodynamic modeling.
  • Chemometric analysis of vibrational spectra.

Main Results:

  • Silicate concentrations found in natural waters displace PA from goethite surfaces.
  • Silicate competes with PA for reactive surface hydroxyl groups (-OH).
  • Long-term reactions and high silicate concentrations favor silicate polymerization and reduce PA loading.

Conclusions:

  • Silicate binding significantly impacts organic contaminant sorption on minerals.
  • Models predicting competitive binding are essential for understanding contaminant fate in dynamic soil environments.
  • Further research is needed for diverse organic contaminants and wet-dry soil conditions.