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Related Concept Videos

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...
Metallic Solids02:37

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. Many...
Valence Bond Theory02:42

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...
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

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Related Experiment Video

Updated: Jun 22, 2026

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

A bimetallic pillared-layer metal-organic coordination framework with a 3D biporous structure.

Tapas Kumar Maji1, Suchetan Pal, K L Gurunatha

  • 1Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560 064, India. tmaji@jncasr.ac.in

Dalton Transactions (Cambridge, England : 2003)
|June 3, 2009
PubMed
Summary

A new metal-organic framework with manganese and iron exhibits permanent porosity. This material shows selective vapor adsorption and hydrogen storage potential.

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

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Last Updated: Jun 22, 2026

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
05:26

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) are crystalline materials with tunable porosity.
  • Bimetallic MOFs offer unique properties by combining different metal ions.
  • Cyanometallate anions and organic linkers are versatile building blocks for MOF synthesis.

Purpose of the Study:

  • To synthesize and characterize a novel 3D biporous pillared-layer metal-organic coordination framework.
  • To investigate the gas sorption properties, specifically for vapors and hydrogen.
  • To evaluate the potential of the material for hydrogen storage applications.

Main Methods:

  • Solvothermal synthesis of the bimetallic [Mn(ii)-Fe(iii)] MOF using a cyanometallate anion ([Fe(CN)(6)](3-)) and 4,4'-bipyridine linker.
  • Gas sorption analysis to determine porosity and selectivity.
  • Powder X-ray diffraction and other characterization techniques to confirm the structure.

Main Results:

  • Successful construction of a 3D biporous pillared-layer MOF with a [Mn(ii)-Fe(iii)] composition.
  • Demonstration of permanent porosity and excellent size-selective vapor sorption capabilities.
  • Significant hydrogen (H2) storage capacity was observed.

Conclusions:

  • The novel bimetallic MOF possesses desirable structural and sorption properties.
  • The material shows promise for applications in selective vapor separation and hydrogen storage.
  • This work expands the library of functional porous coordination polymers.