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Keywords:

  • solid-state emission;
  • polymorphism-dependent emission;
  • optical waveguides;
  • amplified spontaneous emission
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The solid state emission of di(p-methoxylphenyl) dibenzofulvene and analogues is polymorphism dependent. The crystalline forms are strongly emissive, whereas the amorphous solid is weakly fluorescent. As reported by Guanxin Zhang, Dequing Zhang, and co-workers on page 4862, organic crystalline microrods based on the same molecular entity exhibit strong blue and yellow-green emission, outstanding optical waveguide behavior, and amplified spontaneous emission.