SYNTHESIS OF PALLADIUM AND PLATINUM NANOCLUSTERS WITHIN MICROPHASE-SEPARATED DIBLOCK COPOLYMERS
SYNTHESIS OF PALLADIUM AND PLATINUM NANOCLUSTERS WITHIN MICROPHASE-SEPARATED DIBLOCK COPOLYMERS
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DOI：
10.1021/cm00022a026
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发表时间：
1992-07-01
影响因子：
8.6
通讯作者：
COHEN, RE
中科院分区：
文献类型：
--
作者：
CHAN, YNC;CRAIG, GSW;COHEN, RE
小的钯和铂簇已经在纯烃聚合物基质中合成。该方法包括使用W或Mo亚烷基引发剂使石墨烯衍生的有机金属络合物Pd（Cp（N））（PA）和Pt（Cp（N））Me 3（Cp（N）=内-2-（环戊二烯基甲基）降冰片-5-烯和PA = η-3-1-苯基烯丙基）开环易位聚合，随后静态浇铸膜，随后在温和条件下使用分子氢还原有机金属络合物。还制备了有机金属单体和甲基四环十二碳烯（MTD）的二嵌段共聚物。 在合适的条件下，这些共聚物进行微相分离，导致在层状，圆柱形和球形形态。在共聚物膜中形成的金属簇表现出层状和圆柱形的形态主要是在原始的含金属的微区，具有窄的尺寸分布相比，在均聚物膜中形成的簇，直径小于100埃。
Small palladium and platinum clusters have been synthesized within a purely hydrocarbon polymer matrix. The procedure consists of ring-opening metathesis polymerization of norbornene-derived organometallic complexes, Pd(Cp(N))(PA) and Pt(Cp(N))Me3 (Cp(N) = endo-2-(cyclopentadienylmethyl)norborn-5-ene and PA = eta-3-1-phenylallyl), using W or Mo alkylidene initiators, followed by static casting of films and subsequent reduction of the organometallic complexes under mild conditions using molecular hydrogen. Diblock copolymers of the organometallic monomers and methyltetracyclododecene (MTD) also were prepared. Under suitable conditions these copolymers underwent microphase separation, resulting in lamellar, cylindrical, and spherical morphologies. The metal clusters formed in the copolymer films exhibiting lamellar and cylindrical morphologies were predominantly within the original metal-containing microdomains, had a narrow size distribution compared to the clusters formed in the homopolymer films, and were less than 100 angstrom in diameter.