Bis‐Naphthyl Dipicolinic Dicarboxamide‐Based Self‐Assembled Aqueous Nano Dispersion as an Efficient Light Harvesting Medium and Cucurbit[7]Uril Host Complexation Effect Study

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Abstract
Development of artificial light harvesting systems in a minimalistic self‐assembly model is essential for the advancement of their functional scope within chemical and nanomaterial applications. In this work, we report bis‐naphthyl‐4‐hydroxy‐dipicolinic‐dicarboxamide (2‐DPA), a small molecule based aqueous nano‐dispersion as light harvesting medium for Förster resonance energy transfer (FRET) from greenish blue emitting Thioflavin T to orange emitting Pyronin Y and or Rhodamine B acceptor fluorophores. Efficient energy transfer was observed, as evidenced by emission, excitation, and lifetime studies. As well as their materials/morphological properties were probed using high‐resolution TEM and SEM, and confocal fluorescence microscopic imaging platforms. Furthermore, the Cucurbituril[7] host addition was found to have a significant impact on the energy transfer process, due to the formation of supramolecular host‐guest complexes with the Thioflavin T and Pyronin Y dyes, which resulted in the de‐assembly of multiple‐component FRET system.
Funding Information
  • Science Foundation Ireland (13/IA/1865)
  • Irish Research Council (GOIPD/2019/400)

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