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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Luminescence

Background:

  • Chiral molecules are crucial in various scientific fields, including asymmetric synthesis and molecular recognition.
  • Circularly polarized luminescence (CPL) is an advanced optical property with applications in displays, sensors, and security features.
  • Boron-containing compounds offer unique electronic and photophysical properties.

Purpose of the Study:

  • To synthesize novel boron-containing chiral spiro molecules.
  • To investigate the circularly polarized luminescence (CPL) properties of these synthesized molecules.
  • To evaluate their potential for applications in optics and materials science.

Main Methods:

  • Preparation of optically pure bis(boron difluoride) complexes with spirocyclic structures.
  • Utilized commercially available (R)- or (S)-1,1'-spirobiindane-7,7'-diol (SPINOL) as a starting material.
  • A straightforward 3-step synthesis pathway was employed.

Main Results:

  • Successfully synthesized novel boron-containing chiral spiro molecules.
  • The synthesized complexes exhibited bright CPL across the blue to orange spectrum.
  • High luminescence dissymmetry factor (glum) values, up to 3 × 10-3, were observed in both solution and solid states.

Conclusions:

  • The developed synthetic route provides access to chiral boron-containing spiro molecules with tunable CPL properties.
  • These molecules demonstrate significant potential for applications requiring efficient and tunable circularly polarized light emission.
  • The findings contribute to the development of advanced chiral luminescent materials.