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Related Concept Videos

Micelles01:30

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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...
Metal-Ligand Bonds02:51

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...
Formation of Complex Ions03:45

Formation of Complex Ions

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...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

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...
Complexometric Titration: Overview00:39

Complexometric Titration: Overview

Complexometric titration involves the formation of a complex by reacting a metal ion with one or more ligands. A visual indicator often detects the end point of a complexometric titration. It is added to the metal solution before the titration, forming a stable metal–indicator complex and imparting color to the solution. As the titration approaches the equivalence point, the excess of the added ligand displaces the indicator from the metal–indicator complex, releasing the free indicator. The...

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Related Experiment Video

Updated: Jun 13, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
06:40

Synthesis of a Water-soluble Metal–Organic Complex Array

Published on: October 8, 2016

A metal complex that imitates a micelle.

Nicola Giri1, Stuart L James

  • 1Centre for the Theory and Application of Catalysis, School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK.

Chemical Communications (Cambridge, England)
|May 13, 2010
PubMed
Summary
This summary is machine-generated.

A novel metal complex forms a core-shell structure, increasing its nuclearity in water compared to organic solvents. This behavior mimics micelle growth via covalent aggregation.

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Area of Science:

  • Supramolecular Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • Micelles are self-assembled structures crucial in various chemical and biological processes.
  • Understanding self-assembly mechanisms is key to designing advanced materials.
  • Metal complexes offer tunable properties for creating novel supramolecular architectures.

Purpose of the Study:

  • To investigate the self-assembly behavior of a specific metal complex in different solvent environments.
  • To explore the formation of micelle-like structures through covalent aggregation.
  • To compare the nuclearity and structural changes of the metal complex in water versus organic solvents.

Main Methods:

  • Synthesis and characterization of the metal complex.
  • Solvent-dependent studies using techniques like Nuclear Magnetic Resonance (NMR) spectroscopy and Mass Spectrometry.
  • Analysis of structural changes and nuclearity in aqueous and organic media.

Main Results:

  • The metal complex exhibits a micelle-like, core-shell structure.
  • Higher nuclearity of the complex was observed in water compared to organic solvents.
  • The aggregation process in water is driven by covalent interactions, mimicking micelle formation.

Conclusions:

  • The metal complex demonstrates a unique solvent-dependent self-assembly mechanism.
  • Covalent aggregation in water leads to micelle-like structures with higher nuclearity.
  • This finding provides insights into designing metal-based supramolecular systems with controllable aggregation.