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What drives the formation of coinage heterometallic acetylide clusters?

In my synthetic work on organometallic clusters, I'm fascinated by the self-assembly of heterometallic systems involving gold, silver, or copper. I want to move beyond simple synthesis and understand the precise electronic and steric factors that favor the formation of these discrete, often luminescent, acetylide-bridged clusters over other polymeric structures.

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By Payal G Answered 1 year ago

In my view, the formation is driven by a delicate synergy. The linear coordination preference of the coinage metals (Cu, Ag, Au) combines perfectly with the bridging ability and π-acidity of the acetylide ligand. What I've found is that the specific metal combination and the steric bulk of ancillary phosphine ligands are critical. They kinetically trap the intermediate aggregates, directing assembly toward discrete, thermodynamically stable clusters rather than infinite polymers. This precise tuning is what allows access to their fascinating photophysical properties.

 

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