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

11.6K
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...
11.6K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

25.3K
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...
25.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.6K
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...
31.6K
Structural Isomerism02:34

Structural Isomerism

22.4K
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...
22.4K
Colors and Magnetism03:02

Colors and Magnetism

14.5K
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...
14.5K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

9.3K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
9.3K

You might also read

Related Articles

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

Sort by
Same author

Late transition metal complexes supported by an 18-atom benzimidazolylidene tetracarbene macrocycle.

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

Toward Hydrogen Isotope Separations through Strong Hydrogen Adsorption at Open Copper(I) Sites in an Ultramicroporous Metal-Organic Framework.

Journal of the American Chemical Society·2026
Same author

Reaction channels of iron-oxo and iron-imido molecular intermediates.

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

Accurate helium-benzene potential: From CCSD(T) to Gaussian process regression.

The Journal of chemical physics·2026
Same author

Calix[4]arene Design for Enhanced Carbon Capture via Topological Learning.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Multimodal Nanoscale Mapping of Local Structure and CO<sub>2</sub> Adsorption in Metal-Organic Frameworks.

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Mar 21, 2026

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

4.4K

Selective, Tunable O2 Binding in Cobalt(II)-Triazolate/Pyrazolate Metal-Organic Frameworks.

Dianne J Xiao, Miguel I Gonzalez, Lucy E Darago

  • 1Department of Chemistry, and Supercomputing Institute, University of Minnesota , Minneapolis, Minnesota 55455, United States.

Journal of the American Chemical Society
|May 17, 2016
PubMed
Summary

New metal-organic frameworks show high selectivity for oxygen adsorption over nitrogen, crucial for air separation. These materials offer tunable O2 affinities and reversibility, making them promising for industrial applications.

More Related Videos

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

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

Published on: April 28, 2023

3.2K
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

3.9K

Related Experiment Videos

Last Updated: Mar 21, 2026

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

4.4K
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

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

Published on: April 28, 2023

3.2K
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

3.9K

Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Chemical Engineering

Background:

  • Metal-organic frameworks (MOFs) are porous materials with tunable properties.
  • Efficient gas separation, particularly for oxygen from air, is critical for industrial processes.
  • Cobalt-based MOFs are explored for selective gas adsorption due to cobalt's redox activity.

Purpose of the Study:

  • To synthesize and characterize novel cobalt-based metal-organic frameworks for selective oxygen adsorption.
  • To investigate the O2 and N2 adsorption properties and binding affinities of these materials.
  • To explore the structural and electronic factors influencing O2 selectivity and adsorption strength.

Main Methods:

  • Solvothermal synthesis of sodalite-type cobalt-organic frameworks (Co-BTTri and Co-BDTriP).
  • Gas adsorption isotherms (O2, N2) and isosteric heat calculations (Qst).
  • Single-crystal X-ray diffraction, magnetic susceptibility measurements, and electronic structure calculations.

Main Results:

  • Co-BTTri and Co-BDTriP frameworks exhibit selective O2 adsorption over N2.
  • Desolvated cobalt(II) centers show strong O2 binding (Qst = -34(1) kJ/mol for Co-BTTri).
  • Isostructural Co-BDTriP shows enhanced O2 affinity (Qst = -47(1) kJ/mol) due to electron-donating linkers, forming cobalt(III)-superoxo species.

Conclusions:

  • The synthesized MOFs demonstrate excellent O2 selectivity and reversible adsorption capacity.
  • Structural and electronic modifications can tune O2 binding strength for optimized performance.
  • These materials show significant potential as adsorbents for air separation applications.