Gold oligomeric light emitting materials with controllable color emission

Shaun Gallagher¹, Kirk Schanze², and Adam Veige¹

1 University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611
2 University of Texas at San Antonio, Department of Chemistry, One UTSA Circle, San Antonio, TX 78249

The inorganic click (iClick) reaction between PEt₃AuN₃ and various triethylgold diacetylides generate oligomers through aurophilic self-assembly. Gold oligomers were synthesized from gold diacetylides with blue (2,7-diethynyl-9,9-ocyl fluorene), green (2,1,3-benzothiadiazole), and red (4,7-di(thiophen-2-yl)-2,1,3- benzothiadiazole) chromophores and PEt₃AuN₃. The formed oligomers are in a dynamic state because the aurophilic interaction is reversible.  By varying the ratios of oligomers in solution the emission color can be tuned.