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

Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.3K
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...
26.3K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

42.0K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.0K
Valence Bond Theory02:42

Valence Bond Theory

8.5K
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...
8.5K
Coordination Number and Geometry02:57

Coordination Number and Geometry

15.7K
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.
15.7K
Metallic Solids02:37

Metallic Solids

18.4K
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....
18.4K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.7K
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...
20.7K

You might also read

Related Articles

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

Sort by
Same author

Xenon/Krypton Separation on a Bromine Functionalized Benzimidazole-Linked Porous Covalent Organic Polymer.

ACS applied materials & interfaces·2026
Same author

Investigating Synthetic Dolomite Mixtures and Phase Adjustment Parameters in Electrochemical Cement Precursor Production.

Chemphyschem : a European journal of chemical physics and physical chemistry·2026
Same author

Electroactive Metal-Organic Frameworks Enabling Unidirectional Electrochemical Capacitors and Logic Gates (MOF-CAPode).

Angewandte Chemie (International ed. in English)·2026
Same author

Cyclotrimerization Polymers as Precursors for Tailored Porous Carbons and Application in Supercapacitors.

ChemistryOpen·2026
Same author

Three-Electrode, 3D-Printed NMR Cells for Electrooxidation Studies.

Analytical chemistry·2026
Same author

In Situ Insights into Enhanced Cooperative Ligand Exchange Kinetics via Solvent-Induced Restacking in a 2D Metal-Organic Framework.

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Jun 21, 2025

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

2.8K

Guest-selective shape-memory effect in a switchable metal-organic framework DUT-8(Zn).

Leila Abylgazina1, Irena Senkovska1, Volodymyr Bon1

  • 1Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany. irena.senkovska@tu-dresden.de.

Chemical Communications (Cambridge, England)
|July 8, 2024
PubMed
Summary
This summary is machine-generated.

Crystal size engineering impacts flexible metal-organic frameworks (MOFs). Ethanol vapor exposure induces a shape-memory effect in DUT-8(Zn) MOFs, retaining their open pore structure after alcohol removal.

More Related Videos

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
08:12

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

16.0K
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

2.0K

Related Experiment Videos

Last Updated: Jun 21, 2025

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

2.8K
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
08:12

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

16.0K
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

2.0K

Area of Science:

  • Materials Science
  • Chemistry

Background:

  • Flexible metal-organic frameworks (MOFs) offer tunable properties through crystal size engineering.
  • The gating flexibility of DUT-8(Zn) is notably sensitive to particle size.

Purpose of the Study:

  • To investigate the influence of ethanol vapor physisorption on the flexibility and structural integrity of DUT-8(Zn) MOFs.
  • To explore the role of crystal size and surface effects in MOF response to guest molecules.

Main Methods:

  • Physisorption experiments using ethanol vapor.
  • Powder X-ray diffraction (PXRD) analysis.
  • Nitrogen physisorption measurements.

Main Results:

  • Ethanol vapor physisorption induces a shape-memory effect in DUT-8(Zn) crystals, leading to rigidification and suppressed flexibility.
  • The open pore phase of DUT-8(Zn) is selectively retained after alcohol desorption.
  • Nano-structuring and surface deformation of crystals are observed post-alcohol exposure.

Conclusions:

  • Crystal size and surface phenomena play a critical role in the gating flexibility and memory effects of MOFs like DUT-8(Zn).
  • The observed shape-memory effect and retained open pore structure highlight potential applications in selective gas adsorption and separation.