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Self-assembly of singlet-emitting double-helical silver dimers: the curious coordination chemistry and fluorescence of bisquinolylpyridone

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Published
<mark>Journal publication date</mark>21/03/2018
<mark>Journal</mark>Dalton Transactions
Issue number11
Volume47
Number of pages7
Pages (from-to)3906-3912
<mark>State</mark>Published
Early online date9/02/18
<mark>Original language</mark>English

Abstract

2,6-Bis(2-quinolyl)-4(1H)-pyridone 1, a novel quinoline analogue of the well-known ligand 2-terpyridone, shows unusual fluorescence with a large Stokes shift and low energy emission. Pyridine-pyridone tautomerism is investigated by NMR and theoretical methods and indicates that the low energy emission is from the pyridine form. 1 reacts with Ag(I) salts to give a double helical Ag2N6 core showing a BLUE shift in fluorescence with respect to the free ligand, which has been characterised experimentally and theoretically as involving an unusual mixed MLCT/ILCT excited state and emission from a singlet state

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© The Royal Society of Chemistry 2018