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Luminescent twelve-nuclear rhenium clusters.

Yakov M Gayfulin1, Konstantin A Brylev2, Maxim R Ryzhikov2

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Researchers synthesized novel luminescent twelve-nuclear rhenium clusters. These rhenium clusters exhibit red luminescence, a previously unobserved property in similar twelve-nuclear rhenium compounds.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Photochemistry

Background:

  • Rhenium clusters are known for their unique electronic and structural properties.
  • Luminescence in polynuclear metal clusters is an area of active research.
  • Previous twelve-nuclear rhenium clusters did not exhibit luminescence.

Purpose of the Study:

  • To synthesize and characterize new luminescent twelve-nuclear rhenium cluster complexes.
  • To investigate the structural and electronic properties of these novel rhenium clusters.
  • To explore the luminescence properties of rhenium clusters with halide substitutions.

Main Methods:

  • Synthesis of rhenium cluster complexes.
  • Non-isovalent substitution of ligands.
  • X-ray structural analysis.
  • Density Functional Theory (DFT) calculations.

Main Results:

  • Successfully synthesized three new twelve-nuclear rhenium clusters: [Re12CS14(μ-Cl)3Cl6]5-, [Re12CS14(μ-Br)3Cl6]5-, and [Re12CS14(μ-Br)3Br6]5-.
  • Determined the precise geometry of the new clusters using X-ray structural analysis.
  • Evaluated the electronic structures via DFT calculations.
  • Observed red luminescence in both solid-state and solution for the new rhenium clusters.

Conclusions:

  • The first luminescent twelve-nuclear rhenium clusters have been successfully obtained.
  • Non-isovalent substitution of halide anions in the cluster core leads to novel luminescent properties.
  • These findings open new avenues for developing rhenium-based luminescent materials.