期刊
MACROMOLECULES
卷 43, 期 22, 页码 9277-9282出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma102023a
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资金
- U S Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02 06CH11357 9F 31921]
- National Science Foundation [CHE 1010680]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1010680] Funding Source: National Science Foundation
An efficient synthesis of hyperbranched poly(m phenylene)s is achieved by Suzuki poly condensation of a m-terphenyl derived branched AB(2) monomer The resulting hyperbranched polymers show high molecular weight and relatively low polydispersity and are readily soluble in common organic solvents A catalyst system composed of Pd(OAc)(2) and S Phos was found to be highly active in the present Suzuki polycondensation protocol The molecular weight and polydispersity of the polymer are controllable by varying the catalyst loading and the starting monomer concentration Experimental results are consistent with a pseudo-chain-growth pathway that Involves intramolecular catalyst transfer during polymerization Furthermore, the triflate end groups of the hyperbranched poly(m phenylene)s can be efficiently converted to other functionalities via in situ Suzuki-Miyaura cross-couplings
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