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

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

1.1K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.1K

You might also read

Related Articles

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

Sort by
Same author

Floatable chitosan-based cryogels embedded with copper nanoparticles as efficient and reusable heterogeneous catalysts for hydrogenation of 4-nitrophenol.

International journal of biological macromolecules·2026
Same author

Sulfonated Poly(Ether Ether Ketone)/Praseodymium Doped Zinc Ferrite Composites as Promising Polyelectrolyte Membranes for Fuel Cells.

Polymers·2025
Same author

From Nature to Remediation: Biomaterials for Malachite Green Retention and Degradation.

Materials (Basel, Switzerland)·2025
Same author

Clays as Dual-Function Materials for TNT Adsorption and Catalytic Degradation: An Experimental Approach.

Materials (Basel, Switzerland)·2025
Same author

α-Ketoglutaric acid-derived carbon nanodots doped with manganese as fluorescent and MRI contrast agents.

Nanoscale·2025
Same author

Removal of Rifampicin and Rifaximin Antibiotics on PET Fibers: Optimization, Modeling, and Mechanism Insight.

Polymers·2025
Same journal

RETRACTED: Articles from the Special Issue "Effect of Hot Manufacturing Methods on Material Processing by Finite Element Modelling".

Materials (Basel, Switzerland)·2026
Same journal

Correction: Yang et al. Microstructural Characteristics of High-Pressure Die Casting with High Strength-Ductility Synergy Properties: A Review. <i>Materials</i> 2023, <i>16</i>, 1954.

Materials (Basel, Switzerland)·2026
Same journal

Effect of La and Ce Microalloying on the Corrosion Resistance of 0.4Sb Low-Alloy Steel in a Harsh Marine Atmospheric Environment.

Materials (Basel, Switzerland)·2026
Same journal

High-Temperature Properties of Magnesium Ammonium Phosphate Cement Modified with Gold Tailings.

Materials (Basel, Switzerland)·2026
Same journal

A Study on the Evolution of Intermetallic Phase Microstructure and High-Temperature Creep Behavior in Mg-8.0Al-1.0Nd-1.5Gd-Mn Alloys.

Materials (Basel, Switzerland)·2026
Same journal

Material-Driven Clinical Complications in Mechanical Circulatory Support: From Blood-Material Interactions to Device-Related Adverse Events.

Materials (Basel, Switzerland)·2026
See all related articles

Related Experiment Video

Updated: Jun 29, 2025

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.1K

Temperature-Controlled Chain Dynamics in Polyimide Doped with CoCl2 Probed Using Dynamic Mechanical Analysis.

Daniela Ionita1, Mariana Cristea1, Ion Sava1

  • 1"Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania.

Materials (Basel, Switzerland)
|April 9, 2024
PubMed
Summary
This summary is machine-generated.

Cobalt(II) chloride (CoCl2) alters polyimide molecular dynamics, influenced by residual amic acid groups and salt content. The study reveals Co(II)-N coordination bonds and a content-dependent reinforcing effect in polyimide films.

Keywords:
cobalt chloridedynamic mechanical analysispolyimidethermal imidizationviscoelastic behavior

More Related Videos

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

7.8K
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

6.4K

Related Experiment Videos

Last Updated: Jun 29, 2025

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.1K
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

7.8K
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

6.4K

Area of Science:

  • Polymer Science
  • Materials Chemistry
  • Spectroscopy

Background:

  • Polyimides are advanced polymers with applications in electronics and aerospace.
  • Cobalt(II) chloride (CoCl2) is a transition metal salt with potential to modify polymer properties.
  • Understanding polymer-salt interactions is crucial for developing new materials.

Purpose of the Study:

  • To investigate the molecular dynamics and interactions between polyimide and CoCl2.
  • To determine the influence of CoCl2 content on polyimide properties.
  • To elucidate the coordination chemistry between cobalt and the polyimide matrix.

Main Methods:

  • Polyimide synthesis via poly(amic acid) precursor.
  • Fourier Transform Infrared Spectroscopy (FTIR) and 2D correlation spectroscopy (2D-COS) for chemical group analysis.
  • X-ray photoelectron spectroscopy (XPS) for surface elemental composition and bonding.
  • Dynamic Mechanical Analysis (DMA) for evaluating mechanical properties and relaxation behavior.

Main Results:

  • Evidence of residual amic acid groups confirmed by FTIR and 2D-COS.
  • FTIR and XPS indicated Co(II)-N coordination bonds between cobalt and polyimide.
  • Coordination with amic acid groups was also observed.
  • DMA revealed a specific relaxation attributed to CoCl2, with a content-dependent reinforcing effect.

Conclusions:

  • CoCl2 significantly modifies polyimide molecular dynamics.
  • The interaction involves Co(II)-N coordination, potentially with amic acid groups.
  • The reinforcing effect of CoCl2 in polyimide is dependent on its concentration.