Solid-state host-guest influences on a BODIPY dye hosted within a crystalline sponge
| Autor: | Daniel M. Dawson, Sharon E. Ashbrook, Paul R. Raithby, William J. Gee, Helena J. Shepherd, Andrew D. Burrows |
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| Přispěvatelé: | University of St Andrews. EaSTCHEM, University of St Andrews. School of Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Quenching (fluorescence)
Fluorophore Dye Chemistry Metal-organic framework NDAS Phosphor General Chemistry Nuclear magnetic resonance spectroscopy Photochemistry QD Chemistry Emission intensity Solid-state NMR Catalysis chemistry.chemical_compound Solid-state nuclear magnetic resonance BODIPY Bathochromic shift Materials Chemistry QD Crystalline sponge |
| ISSN: | 1144-0546 |
| Popis: | The authors gratefully acknowledge support from an EPSRC programme grant (grant no. EP/K004956/1). Manipulating the emission characteristics of phosphors is a viable strategy to produce unique, and thus difficult to replicate, security optical features that are useful in anticounterfeiting applications. Here, a fluorophore, BODIPY 493/503, displayed altered solid-state emission characteristics upon being hosted within a crystalline molecular flask. Specifically, a bathochromic shift of 939 cm-1 was observed (λ(max): 633 → 673 nm), with a concomitant reduction in emission intensity, and emission dependency on excitation wavelength. Multiple factors likely contribute to this behaviour, such as emission filtering by the host framework, exciplex formation between BODIPY and the electron-deficient framework, and collisional quenching between the host and guest. Here we prioritize solid-state analyses to explore these factors, including electron density mapping of the framework pores, and multinuclear solid-state NMR spectroscopy. Publisher PDF |
| Databáze: | OpenAIRE |
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