Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

9.7K
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...
9.7K
Ferromagnetism01:31

Ferromagnetism

2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
Colors and Magnetism03:02

Colors and Magnetism

12.3K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

27.9K
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...
27.9K
Metallic Solids02:37

Metallic Solids

18.8K
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....
18.8K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

21.5K
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...
21.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Metallo-Hydrogen-Bonded Organic Frameworks (MHOFs) Integrating Tunable Spin Crossover Properties and Proton Conduction.

Inorganic chemistry·2026
Same author

Chiral inversion of macroscopic helical structures in coordination polymers induced by lanthanide ions.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Fabrication of Hierarchical Chiral Coordination Polymer-Based Stationary Phases for Enhanced HPLC Enantioseparation.

ACS applied materials & interfaces·2026
Same author

Photoresponsive luminescent single-molecule magnets based on dysprosium-anthracene complexes: regulating the de-dimerization temperature of the photocycloaddition product by co-ligand.

Chemical science·2025
Same author

All-component-active metal-organic frameworks for tailored chemoradiotherapy of self-defensive tumors.

Chemical science·2025
Same author

Synergistic Photoredox and High-Spin Cobalt Cluster Dual Heterogeneous Catalysis: Visible-Light-Driven C(sp<sup>2</sup>)-H Bond Functionalization.

Inorganic chemistry·2025

Related Experiment Video

Updated: Sep 15, 2025

Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites
06:48

Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites

Published on: June 14, 2024

1.9K

Metal-organic framework containing Co3(μ3-OH)-based kagomé layers showing long-range weak ferromagnetic ordering.

Yan Xu1, Qian-Qian Su2, Bei Liu2

  • 1Department of Chemistry, School of Biological and Materials Engineering, Suqian University, Suqian, 223800, P. R. China.

Chemical Communications (Cambridge, England)
|July 16, 2025
PubMed
Summary

Two new cobalt compounds with 3D framework structures were synthesized. Compound 1 exhibits weak ferromagnetic ordering below 30 K, indicating potential for magnetic materials research.

More Related Videos

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.1K
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

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

Published on: May 12, 2023

3.1K

Related Experiment Videos

Last Updated: Sep 15, 2025

Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites
06:48

Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites

Published on: June 14, 2024

1.9K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.1K
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

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

Published on: May 12, 2023

3.1K

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Solid-State Chemistry

Background:

  • Investigating novel coordination compounds with unique structural and magnetic properties.
  • Exploring the impact of isomeric ligands on the formation of 3D metal-organic frameworks.

Purpose of the Study:

  • To synthesize and characterize new cobalt-based compounds using isomeric phosphonic acids.
  • To determine the crystal structures and magnetic behaviors of the synthesized materials.

Main Methods:

  • Solvothermal synthesis of cobalt compounds.
  • Single-crystal X-ray diffraction for structural determination.
  • Magnetic susceptibility measurements to probe magnetic ordering.

Main Results:

  • Two compounds, Co2(OH)(5-cnapp)(H2O) (1) and Co8(OH)(4-cnapp)5(H2O)10·12H2O (2), were successfully synthesized.
  • Compound 1 features a distorted Co3(μ3-OH)-based kagomé layer.
  • Compound 1 displays long-range weak ferromagnetic ordering below 30 K with minimal spin frustration.

Conclusions:

  • The use of positionally isomeric phosphonic acids leads to distinct 3D framework structures in cobalt compounds.
  • Compound 1 represents a novel kagomé-lattice material with interesting weak ferromagnetic properties.