Anthracene derived dinuclear gold(I) diacetylide complexes: Synthesis, photophysical properties and supramolecular interactions

• Synthesis and characterization of three new anthracene based gold (I) diacetylide complexes 1–3.
• 1 was found to be highly fluorescent and having good quantum yields as compare to 2 and 3.
• Single crystal studies of 1 shows intermolecular Au⋯HC interactions involved in the formation of unique supramolecular 2D-network.
• Single crystal studies of 2 and 3 reveal the existence of CH-π, π-π and intramolecular Au⋯HC interactions.

New anthracene derived dinuclear Au(I)-diacetylide complex (1) has been synthesized in which two Au(I) units are attached at 9,10- positions of ethynyl anthracene moiety. 1 exhibits rare non-covalent intermolecular Au⋯HC interactions, leading to the formation of a supramolecular 2D-network. Further, to understand the effect of CCAuPPh3 units at different position, complexes (2) and (3) were synthesized, where CCAuPPh3 units are attached to 2,6- and 1,8- positions of anthracene, respectively. The absorption and emission spectra of 1–3 have been studied and surprisingly 1 was found to be highly fluorescent with high quantum yield compared to 2 and 3, this may be due to more perturbation of Au(I) on π system. Complexes 1–3 have been characterized by elemental analysis, NMR and Mass spectroscopy and authenticated by their single-crystal X-ray structures.

Three anthracene based binuclear Au(I) complex was synthesized and characterized, out of three 1 was found to be highly fluorescent with good quantum yield and also exhibits non-covalent intermolecular Au⋯HC interactions, leads to the formation of unique supramolecular 2D-network.Figure optionsDownload as PowerPoint slide