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Bonding in Metals

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.

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....

Alkali Metals

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals

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...

Lumber Defects

Lumber Defects

Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...

Properties of Transition Metals

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

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Related Experiment Video

Updated: Feb 15, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Defective Metal-Organic Frameworks.

Stefano Dissegna¹, Konstantin Epp¹, Werner R Heinz¹

¹Chair of Inorganic and Metal-Organic Chemistry, Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85748, Garching, Germany.

Advanced Materials (Deerfield Beach, Fla.)

|January 25, 2018

Summary

This summary is machine-generated.

Defects in metal-organic frameworks (MOFs) enhance catalytic activity and introduce new properties like conductivity. Tailoring these defects offers exciting possibilities for advanced material applications.

Keywords:

catalysis defects electrical conductivity metal-organic frameworks sorption

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

Area of Science:

Materials Science
Chemistry

Background:

Defect engineering in crystalline materials enables property manipulation for technological applications.
Metal-organic frameworks (MOFs) are increasingly recognized for their tunable properties through defect incorporation.

Purpose of the Study:

To review recent advancements (past two years) in defect engineering of MOFs.
To highlight how tailored defects alter MOF properties, focusing on catalysis and conductivity.
To discuss the emerging quantitative understanding of MOF defects using computational methods.

Main Methods:

Overview of defect incorporation strategies (missing linkers, missing nodes) in MOFs.
Analysis of property changes resulting from defect engineering.
Review of computational modeling and simulation techniques for MOF defect analysis.

Main Results:

Defect incorporation in MOFs improves heterogeneous catalysis by optimizing active sites and diffusion.
Engineered defects can introduce electronic conductivity into otherwise insulating MOFs.
Scale-bridging computational modeling provides quantitative insights into MOF defects and heterogeneity.

Conclusions:

Defect engineering is a powerful strategy for tailoring MOF properties for advanced applications.
Targeted defect creation in MOFs significantly enhances their performance in catalysis and introduces novel functionalities.
Computational approaches are crucial for understanding and predicting the impact of defects in MOFs.