期刊
ACS MACRO LETTERS
卷 2, 期 7, 页码 571-574出版社
AMER CHEMICAL SOC
DOI: 10.1021/mz400232y
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资金
- Robert A. Welch Foundation [A-0639]
- Qatar National Research Fund [4-081-1-016]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0952134] Funding Source: National Science Foundation
Polyisobutylene (PIB)-bound ruthenium bipyridine [Ru(PIB-bpy)(3)](2+) metal complexes were prepared from PIB ligands formed by alkylation of 4,4-dimethylbipyridine with polyisobutylene bromide. The product Ru(PIB-bpy)(3)Cl-2 complexes with at least one PIB ligand per bipyridine unit function as soluble recyclable photoredox catalysts in free radical polymerization of acrylate monomers under visible light irradiation at 25 degrees C with ethyl 2-bromoisobutyrate as the initiator in the presence of diisopropylethylamine. The polyacrylate products contained only about 1 ppm Ru contamination. This PIB-bound catalyst was recyclable and showed about 50-fold less Ru leaching as compared to Ru leaching in a polymerization catalyzed by the low molecular weight Ru catalyst, Ru(bpy)(3)(PF6)(2).
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