Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 45, Pages 14003-14006Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707097
Keywords
dyes; host-guest systems; luminescence; microporous materials; supramolecular cages
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Funding
- National Science Foundation [DMR-1308677]
- NSF MRSEC Program [DMR-1400273]
- NSF CRIF Program [CHE-0840277]
- JSPS
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1308677] Funding Source: National Science Foundation
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The sequestration of luminophores within supramolecular polyhedral compartments of a crystalline zeolitelike 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)]Cl-2, and rhodamine B, can be encapsulated in amounts of up to one molecule per cage, equivalent to a concentration of 0.175m, 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 selfquenching. 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.
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