Luminescent properties of carbon-rich starburst gold(I) acetylide complexes.: Crystal structure of [TEE][Au(PCy3)]4 ([TEE]H4 = tetraethynylethene)

Two carbon-rich starburst gold(I) acetylide complexes [TEE][Au(PCy3)](4) (3, [TEE]H-4 = tetraethynylethene) and [TEB][AU(PCy3)](3) (6, [TEB]H-3 = 1,3,5-triethynylbenzene) were prepared and their UV-vis absorption, emission and excitation spectra have been recorded. In fluid CH2Cl2 solutions, 3 exhibits prompt (1)(pipi*) fluorescence with lambda(0-0) and lambda(max) at 413 and 428 nm, respectively, while 6 displays (3)(pipi*) phosphorescence with lambda(0-0) and lambda(max) at 446 and 479 nm, respectively. The crystal structure of 3(.)CH(2)Cl(2) has been determined. (C) 2002 Elsevier Science B.V. All rights reserved.