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Germylenes Exhibiting Solid-State Emissions that Extend to NIR.

Pratima Shukla1, Jitendra Nath Acharyya2, Pritam Mahawar1

  • 1Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 24, 2023
PubMed
Summary

Researchers developed novel fluorescent low-valent main group compounds. These germylene carboxylates exhibit room-temperature solid-state photoluminescence, emitting light near the near-infrared region.

Keywords:
germylene carboxylatesgermylene pyrrolidemetallylenesphotoluminescencesolid-state emission

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Photochemistry

Background:

  • Low-valent main group compounds are typically non-emissive in the solid-state.
  • Developing fluorescent materials is crucial for advanced optical applications.

Purpose of the Study:

  • To synthesize and characterize novel low-valent main group compounds with solid-state fluorescence.
  • To investigate the photoluminescent properties of germylene carboxylates.

Main Methods:

  • Synthesis of dipyrromethene stabilized germylene pyrrolide.
  • Reaction of germylene pyrrolide with various carboxylic acids (acetic, trifluoroacetic, benzoic, p-cyanobenzoic, p-nitrobenzoic, acetylsalicylic acid).
  • Characterization of photoluminescence properties at room temperature.

Main Results:

  • Successfully synthesized a series of germylene carboxylates (compounds 3-8).
  • Observed room-temperature photoluminescence in the solid-state for these compounds.
  • Emissions were detected extending close to the near-infrared (NIR) region.

Conclusions:

  • This study reports the first known low-valent main group compounds exhibiting solid-state fluorescence.
  • Germylene carboxylates are promising candidates for NIR-emitting materials.
  • The synthetic strategy provides a pathway to new fluorescent main group compounds.