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Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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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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Valence Bond Theory02:42

Valence Bond Theory

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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...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.6K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.5K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
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Related Experiment Video

Updated: Nov 2, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Engineering Two-Dimensional Metal-Organic Framework on Molecular Basis for Fast Li+ Conduction.

Jianming Yu1, Taolian Guo1,2, Chao Wang1

  • 1College of Engineering and Applied Sciences, and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210023, China.

Nano Letters
|June 15, 2021
PubMed
Summary

Engineered metal-organic frameworks (MOFs) act as active fillers in composite polymer electrolytes (CPEs), significantly boosting lithium-ion (Li+) conductivity and mechanical strength for advanced battery applications.

Keywords:
Composite polymer electrolytesfast Li+ channelshigh Li+ conductivitymetal−organic frameworksmolecule conception

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) are emerging as promising fillers for composite polymer electrolytes (CPEs).
  • Current MOF fillers are often passive, limiting improvements in ionic conductivity.
  • Developing continuous MOF reinforcements and utilizing their active properties is a key challenge.

Purpose of the Study:

  • To engineer fast lithium-ion (Li+) conduction within MOFs for enhanced CPE performance.
  • To investigate the active role of MOFs in facilitating Li+ transport.
  • To develop a MOF-reinforced CPE with high ionic conductivity and mechanical strength.

Main Methods:

  • Molecular design of MOFs for Li+ conduction.
  • Selection and characterization of 2D Cu(BDC) MOF as an active filler.
  • In situ growth of MOF within the polymer matrix to create reinforced CPEs.
  • Electrochemical measurements of ionic conductivity and full cell cycling performance.

Main Results:

  • Demonstrated feasible engineering of fast Li+ conduction within MOFs.
  • Cu(BDC) MOF showed open metal sites for anion anchoring, releasing free Li+.
  • Developed a Cu(BDC)-scaffold-reinforced CPE with high ionic conductivity (0.24 mS cm-1 at ambient conditions).
  • Achieved high mechanical strength and stable cycling in a solid-state Li-NCM811 full cell.

Conclusions:

  • A molecule-based Li+ conduction strategy was successfully implemented.
  • MOF-reinforced CPEs offer a pathway to advanced solid-state batteries.
  • This approach provides new insights for designing high-performance CPEs.