Encapsulation of Isolated Luminophores within Supramolecular Cages

Marcel Handke, Takuji Adachi, Chunhua Hu, Michael D. Ward

Research output: Contribution to journalArticlepeer-review


The sequestration of luminophores within supramolecular polyhedral compartments of a crystalline zeolite-like hydrogen-bonded framework illustrates a unique approach to limiting the self-quenching ordinarily exhibited at the high concentrations achievable in this framework. A range of differently sized luminescent guests, namely coumarin 1, coumarin 4, fluorescein, [Ru(bpy)3]Cl2, and rhodamine B, can be encapsulated in amounts of up to one molecule per cage, equivalent to a concentration of 0.175 m, which is significantly higher than the concentration at which aggregation-induced quenching occurs in other media. The luminescence spectra of the encapsulated guests are consistent with the presence of isolated monomers and the absence of self-quenching. The emission color of the single crystals can be tuned readily from blue to red through the choice of guest molecules. These observations promise an approach to organic solid-state lasing compounds if crystals of sufficient size and quality can be prepared.

Original languageEnglish (US)
Pages (from-to)14003-14006
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number45
StatePublished - Nov 6 2017


  • dyes
  • host–guest systems
  • luminescence
  • microporous materials
  • supramolecular cages

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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