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

Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

4.1K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
4.1K
Coordination Number and Geometry02:57

Coordination Number and Geometry

19.4K
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.
19.4K
Stereoisomerism02:52

Stereoisomerism

14.3K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
14.3K
Valence Bond Theory02:42

Valence Bond Theory

11.5K
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...
11.5K
Structural Isomerism02:34

Structural Isomerism

22.3K
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...
22.3K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

3.0K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
3.0K

You might also read

Related Articles

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

Sort by
Same author

Structural evolution of iron oxides melts at Earth's outer-core pressures.

Nature communications·2026
Same author

Momentum-Resolved X-Ray Thomson Scattering Benchmark of Electronic-Response Models in Warm Dense Aluminium.

Physical review letters·2026
Same author

Acta Crystallographica Section B welcomes three new Co-editors.

Acta crystallographica Section B, Structural science, crystal engineering and materials·2026
Same author

Pressure-Induced Detrapping from Self-Trapped Excitons to Free Excitons toward Enhanced Emission and Piezochromism in Ruddlesden-Popper (110)-Oriented Perovskites.

ACS applied materials & interfaces·2025
Same author

Synthesis of Gold Hydride at High Pressure and High Temperature.

Angewandte Chemie (International ed. in English)·2025
Same author

High-quality ultra-fast total scattering and pair distribution function data using an X-ray free-electron laser.

IUCrJ·2025

Related Experiment Video

Updated: Mar 7, 2026

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

10.5K

Piezochromic Topology Switch in a Coordination Polymer.

Michał Andrzejewski1, Andrzej Katrusiak1

  • 1Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznan, Poland.

The Journal of Physical Chemistry Letters
|February 8, 2017
PubMed
Summary

Coordination polymers exhibit striking piezochromic behavior, changing color under pressure. These reversible transformations in CoCl2bpp offer a visual method for pressure calibration.

More Related Videos

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

6.9K
Author Spotlight: Modular Neuronal Networks for Analyzing Brain Functions
07:38

Author Spotlight: Modular Neuronal Networks for Analyzing Brain Functions

Published on: June 7, 2024

2.4K

Related Experiment Videos

Last Updated: Mar 7, 2026

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

10.5K
High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

6.9K
Author Spotlight: Modular Neuronal Networks for Analyzing Brain Functions
07:38

Author Spotlight: Modular Neuronal Networks for Analyzing Brain Functions

Published on: June 7, 2024

2.4K

Area of Science:

  • Materials Science
  • Crystallography
  • Solid-State Chemistry

Background:

  • Coordination polymers are advanced materials with tunable properties.
  • Piezochromism, a color change in response to applied pressure, is a fascinating phenomenon.
  • Understanding pressure-induced structural transformations is key to developing novel materials.

Purpose of the Study:

  • To investigate the piezochromic behavior of the coordination polymer CoCl2bpp.
  • To determine the structural changes associated with pressure-induced phase transitions.
  • To assess the potential of CoCl2bpp for pressure calibration.

Main Methods:

  • In situ structural determination using X-ray diffraction in a diamond-anvil cell.
  • Spectroscopic analysis to monitor color changes.
  • High-pressure experiments up to 2.39 GPa.

Main Results:

  • CoCl2bpp undergoes reversible piezochromic transformations at 1.93 GPa (blue to green) and 2.39 GPa (green to colorless).
  • Structural analysis reveals changes in cobalt coordination from tetrahedral to octahedral and alterations in polymer topology from 1D chains to 2D sheets.
  • Distinct color and shape changes correlate with specific pressure magnitudes.

Conclusions:

  • The coordination polymer CoCl2bpp demonstrates significant piezochromic properties.
  • The observed phase transitions and associated structural modifications are reversible.
  • CoCl2bpp is a promising candidate for calibrating pressure magnitudes due to its clear visual response.