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Metallic Solids

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

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...

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Updated: Jun 24, 2025

Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules

Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules

Published on: April 28, 2014

Giant Expanded Porous Metallo-Hexagons.

Zhilong Jiang¹, Bangtang Chen¹, He Zhao²

¹Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangdong 510006, China.

Journal of the American Chemical Society

|June 5, 2024

Summary

Researchers synthesized giant, hollow supramolecular hexagons (H1 and H2) using molecular self-assembly. These stable, large-cavity nanostructures demonstrate precise control over size and shape for advanced materials design.

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Area of Science:

Supramolecular chemistry
Nanomaterials science
Materials engineering

Background:

Molecular self-assembly is a key method for creating biomimetic nanostructures.
Designing complex supramolecular architectures with controlled dimensions remains a challenge.

Purpose of the Study:

To synthesize novel giant hollow coronoid-like supramolecular hexagons.
To characterize their structure, stability, and potential for property transformation.

Main Methods:

Synthesis of supramolecular hexagons H1 and H2.
Characterization using 1D and 2D NMR, Transmission Electron Microscopy (TEM), Electrospray Ionization Mass Spectrometry (ESI-MS), and Traveling Wave Ion Mobility Mass Spectrometry (TWIM-MS).

Main Results:

Successfully synthesized two giant hollow supramolecular hexagons, H1 and H2.
H2, with a 6.8 nm edge length, is among the largest reported hexagons.
Hexagons exhibit large cavities, enhanced stability via specific connectivities, and high metal center density.
H1's properties are transformable through thermodynamic conversion of its metallopolymer.

Conclusions:

Demonstrated the feasibility of constructing giant supramolecular architectures with precise size and shape control.
Opened new avenues for designing and synthesizing sophisticated supramolecules and nonbiological materials.