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Back in bismuth: controlling triplet energy transfer, phosphorescence, and radioluminescence via supramolecular interactions

https://doi.org/10.1039/D3TC02040A

Marwitz, Alexander C; Nicholas, Aaron D; Magar, Rajani Thapa; Dutta, Anuj K; Swanson, Joel; Hartman, Tyler; Bertke, Jeffery A; Rack, Jeffrey J; Jacobsohn, Luiz G; Knope, Karah E (November 2023, Journal of Materials Chemistry C)

Five bismuth-organic materials that exhibit fluorescence or phosphorescence and radioluminescence are reported, with the photophysical behavior dependent on both the identity of the outer sphere fluorophore and noncovalent interactions.
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More robust local governance suggests positive effects of long‐term community conservation

https://doi.org/10.1111/csp2.297

Salerno, Jonathan; Andersson, Krister; Bailey, Karen M.; Hilton, Tom; Mwaviko, Kephania K.; Simon, Isaya Donald; Bracebridge, Claire; Mangewa, Lazaro Johana; Nicholas, Aaron; Rutabanzibwa, Harold; et al (January 2021, Conservation Science and Practice)
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Synthesis, structure and photophysical properties of a 2D network with gold dicyanide donors coordinated to aza[5]helicene viologen acceptors

https://doi.org/10.1039/c9dt01823a

Patel, Ealin N.; Arthur, Robert B.; Nicholas, Aaron D.; Reinheimer, Eric W.; Omary, Mohammad A.; Brichacek, Matthew; Patterson, Howard H. (July 2019, Dalton Transactions)

A recently synthesized photoluminescent organic acceptor, 5,10-dimethyl-5,10-diaza[5]helicene is shown to react with dicyanoaurate anions to form a 2D network N , N -dimethylaza[5]helicene dicyanoaurate. The structure of the synthesized complex was investigated via X-ray crystallography showing the presence of [Au(CN) 2 ] − dimers and monomers within the helicene framework. Photophysical measurements between 298 K and 10 K indicate quenching of the [Au(CN) 2 ] − anion by 5,10-dimethyl-5,10-diaza[5]helicene via an electron transfer. A Stern–Volmer and Rehm–Weller analysis shows that this is a result of quenching from transfer of an electron from [Au(CN) 2 ] − anions to 5,10-dimethyl-5,10-diaza[5]helicene as opposed to resonance energy transfer. DFT calculations were performed to support the assignment of an electron transfer.
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