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Issue 27, 2019
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Synthesis, structure and photophysical properties of a 2D network with gold dicyanide donors coordinated to aza[5]helicene viologen acceptors

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Abstract

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.

Graphical abstract: Synthesis, structure and photophysical properties of a 2D network with gold dicyanide donors coordinated to aza[5]helicene viologen acceptors

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Supplementary files

Article information


Submitted
01 mai 2019
Accepted
10 jun 2019
First published
17 jun 2019

Dalton Trans., 2019,48, 10288-10297
Article type
Paper
Author version available

Synthesis, structure and photophysical properties of a 2D network with gold dicyanide donors coordinated to aza[5]helicene viologen acceptors

E. N. Patel, R. B. Arthur, A. D. Nicholas, E. W. Reinheimer, M. A. Omary, M. Brichacek and H. H. Patterson, Dalton Trans., 2019, 48, 10288
DOI: 10.1039/C9DT01823A

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