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Updated: Apr 25, 2026
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Anionic depolymerization transition in IrTe2.
Yoon Seok Oh1, J J Yang2, Y Horibe1
1Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Piscataway, New Jersey 08854, USA.
Selenium substitution significantly raises the transition temperature of iridium ditelluride (IrTe2) to a diamagnetic state. This unique depolymerization transition is linked to structural changes and bond destabilization, offering new insights into inorganic solids.
Area of Science:
- Solid-state chemistry
- Materials science
- Crystallography
Background:
- Iridium ditelluride (IrTe2) exhibits a transition to a diamagnetic superstructure at 278 K.
- Understanding factors influencing phase transitions in transition metal dichalcogenides is crucial for materials design.
Purpose of the Study:
- To investigate the effect of selenium substitution on the transition temperature and structural properties of iridium ditelluride.
- To elucidate the mechanism behind the temperature-induced transition in IrTe2.
Main Methods:
- Synthesis of selenium-substituted iridium ditelluride.
- Transmission electron microscopy (TEM) for structural analysis.
- Temperature-dependent magnetic susceptibility measurements.
Main Results:
- Selenium substitution increased the transition temperature from 278 K to 560 K.
- TEM revealed a change in structural modulations from q = 1/5(101) to q = 1/6(101) upon substitution.
- The transition is associated with the destabilization of polymeric Te-Te bonds.
Conclusions:
- Selenium substitution effectively enhances the transition temperature in IrTe2.
- The observed transition is a unique temperature-induced depolymerization phenomenon in crystalline inorganic solids.
- Chemical and hydrostatic pressure also influence this depolymerization transition.
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