Chem. Mater. 1993,5, 566-570
566
Synthesis of Palladium Nanoclusters within Spherical Microdomains in Films Made from Block Copolymer/ Homopolymer Blends Y. Ng Cheong Chan and Richard R. Schrock' Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Received October 27, 1992. Revised Manuscript Received February 5, 1993 Palladium-containing block copolymers of general formula [Pd(CpN)(PA)l.[MTDl, (CpN= endo-2-(cyclopentadienylmethyl)norborn-5-ene,P A = a3-l-phenylallyl, and MTD = methyltetracyclododecene) that exhibit a spherical morphology when blended with polyMTD homopolymer have been prepared by living ring-opening metathesis polymerization (ROMP) using Mo(CHCMe2Ph)(NAr)(O+Bu)n (Ar = 2,6-diisopropylphenyl) as the ROMP initiator. Mild heating of the polymer films under hydrogen leads to the formation of small palladium clusters (
