Luminescent Gold(III) Thiolates: Supramolecular Interactions Trigger and Control Switchable Photoemissions from Bimolecular Excited States.

ABSTRACT: A new family of cyclometallated gold(III) thiolato complexes based on pyrazine-centred pincer ligands has been prepared, (C^N^pz ^C)AuSR, where C^N^pz ^C=2,6-bis(4-Bu^t C₆ H₄ )pyrazine dianion and R=Ph (1), C₆ H₄ tBu-4 (2), 2-pyridyl (3), 1-naphthyl (1-Np, 4), 2-Np (5), quinolinyl (Quin, 6), 4-methylcoumarinyl (Coum, 7) and 1-adamantyl (8). The complexes were isolated as yellow to red solids in high yields using mild synthetic conditions. The single-crystal X-ray structures revealed that the colour of the deep-red solids is associated with the formation of a particular type of short (3.2-3.3 Å) intermolecular pyrazine⋅⋅⋅pyrazine π-interactions. In some cases, yellow and red crystal polymorphs were formed; only the la

SUBMITTER: Currie L 

PROVIDER: S-EPMC5215685 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature