Cationic platinum(II) complexes of the type [(xbpy)Pt(Ph)(THF)]+ (xbpy = 4,4'-disubstituted-2-2'-dipyridyl; THF = tetrahydrofuran) have been shown to catalyze the hydrophenylation of ethylene, generating ethyl benzene, styrene and diethylbenzenes. However, these Pt(II) catalysts suffer from instability. For example, the longest-lived catalyst, [(tbpy)Pt(Ph)(THF)]+, provides up to 140 turnovers before deactivation. Kinetic studies have revealed that the process for catalyst deactivation is likely second order in Pt. In an effort to increase thermal stability and decrease decomposition pathways, a strategy to covalently attach bpy-supported Pt(II) complexes to mesoporous silica nanoparticles (MSNs) was developed. The presentation will provide results from MSN-Pt syntheses, characterization of the new materials, and testing for catalytic olefin hydroarylation.

Pt(II) complexes supported on mesoporous silica nanoparticles: New catalyst for olefin hydroarylation

251st National Meeting (2016)

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