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 Experiment Videos

A multifunctional high-spin biradical pyrazolylbipyridine-bisnitronylnitroxide.

Giorgio Zoppellaro1, Volker Enkelmann, Ahmed Geies

  • 1Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.

Organic Letters
|December 21, 2004
PubMed
Summary

Researchers synthesized and characterized nitronyl- and iminonitroxides. Exchange interactions were stronger in nitronylnitroxides, and pyrazole substitution altered distances and couplings, diminishing exchange interactions.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Simultaneous delayed fluorescence and phosphorescence in organic luminescent material employing multiple excited states.

Light, science & applications·2025
Same author

Redox-Switchable Single-Atom Catalyst Enables Efficient Aqueous Hydroxymethylfurfural Oxidation.

ACS catalysis·2025
Same author

Enzyme-inspired single-atom photocatalysis for oxygen reduction to hydrogen peroxide.

Nature communications·2025
Same author

Cation Vacancies in Ti-Deficient TiO<sub>2</sub> Nanosheets Enable Highly Stable Trapping of Pt Single Atoms for Persistent Photocatalytic Hydrogen Evolution.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same author

Atomic Scale Engineering of Multivalence-State Palladium Photocatalyst for Transfer Hydrogenation with Water as a Proton Source.

Advanced materials (Deerfield Beach, Fla.)·2025
Same author

Oxidation-Triggered Formation of Diradical Cations from Paramagnetic Molecules and Their Spin Density Evolution.

Molecules (Basel, Switzerland)·2025

Area of Science:

  • Coordination Chemistry
  • Organic Synthesis
  • Spectroscopy

Background:

  • Nitronyl- and iminonitroxides are important spin probes and building blocks in molecular magnetism.
  • Pyrazolylbipyridine ligands offer versatile coordination environments for metal ions and organic radicals.

Purpose of the Study:

  • To synthesize and characterize novel functional nitronyl- and iminonitroxides based on pyrazolylbipyridine scaffolds.
  • To investigate the influence of ligand structure on magnetic exchange interactions and solid-state properties.

Main Methods:

  • Synthesis of functional nitronyl- and iminonitroxides.
  • UV-vis, IR, and EPR spectroscopic characterizations.
  • X-ray structural analysis.

Main Results:

Related Experiment Videos

  • Stronger exchange interactions were observed between nitronylnitroxides compared to iminonitroxides.
  • Substitution of pyridine with a pyrazole ring resulted in shorter metal-ligand distances and larger dipolar couplings.
  • Despite shorter distances, the exchange interaction was diminished upon pyrazole ring substitution.
  • Compound 1 formed dimers in the solid state, while terpyridine 3 exhibited supramolecular pi-stacking.

Conclusions:

  • The electronic and structural properties of pyrazolylbipyridine ligands significantly influence the magnetic exchange interactions in nitronyl- and iminonitroxide systems.
  • Ligand design offers a pathway to tune magnetic properties and control solid-state assembly.