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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

1.5K
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.
1.5K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

23.2K
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...
23.2K
Metallic Solids02:37

Metallic Solids

20.2K
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....
20.2K
Coordination Number and Geometry02:57

Coordination Number and Geometry

18.3K
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.
18.3K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

688
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...
688
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

25.3K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
25.3K

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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Metal-Organic Frameworks Based on Group 3 and 4 Metals.

Liang Feng1, Jiandong Pang1, Ping She2

  • 1Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA.

Advanced Materials (Deerfield Beach, Fla.)
|September 9, 2020
PubMed
Summary

Group 3 and 4 metal-organic frameworks (MOFs) exhibit high stability and diverse structures for applications like water adsorption and carbon conversion. Recent advancements focus on designing robust MOFs with high connectivity for catalysis and sensing.

Keywords:
actinidesgroup 3 metalsgroup 4 metalslanthanidesmetal-organic frameworkstitaniumzirconium

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) built with Group 3 and 4 metals offer exceptional chemical stability and structural diversity.
  • Their strong coordination bonds and varied coordination modes enable unique properties and functions.
  • These MOFs are prime candidates for water adsorption, carbon conversion, and biomedical applications.

Purpose of the Study:

  • To summarize significant progress in Group 3 and 4 metal-based MOFs since 2018.
  • To provide an update on the current status and future trends in designing robust MOFs with high connectivity.
  • To highlight novel properties and applications of these MOFs.

Main Methods:

  • Review of cluster chemistry involving Y, lanthanides, actinides, Ti, and Zr.
  • Analysis of recently developed MOFs based on Group 3 and 4 metals, categorized by building blocks.
  • Highlighting novel properties and applications in catalysis, adsorption, separation, delivery, and sensing.

Main Results:

  • Significant advancements in structural design and properties of Group 3 and 4 metal MOFs have been achieved.
  • These MOFs demonstrate promising applications in catalysis, adsorption/separation, drug delivery, and sensing.
  • The review identifies key trends in developing highly connected and robust MOF structures.

Conclusions:

  • Group 3 and 4 metal-based MOFs are highly promising for diverse practical applications due to their stability and tunability.
  • Future research should focus on designing robust MOFs with high connectivity for enhanced performance.
  • This review serves as a guide for future discovery and development of functional MOFs.