期刊
MACROMOLECULES
卷 42, 期 20, 页码 7670-7677出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma901410k
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资金
- NSF [DMR 0120967, DMR 0520567]
- CAREER Award [DMR 0747489]
- ACS-PRF Type G Award
- Department of Energy Solar America
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0747489] Funding Source: National Science Foundation
An investigation for the initiation of a chain-growth polymerization, Kumada catalyst-transfer polycondensation, for the synthesis of poly(3-hexylthiophene) is described. A novel method for the generation of all active catalyst/initiator complex was developed utilizing the inexpensive, air stable Ni(PPh3)(2)Cl-2 precursor to generate the active Ni(PPh3)(4) catalyst in situ. Poly(3-hexylthiophene) polymerization reactions were carried out using aryl halides with various substituents on the phenyl ring as external initiators, and it Was found that the type of the functional group present oil the initiator plays a crucial role in the polymerization. The new method provided a more efficient way to initiate polymerization yielding polymers with higher regioregularity, larger Molecular weight, and lower polydispersity than the previously reported methods.
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