期刊
APPLIED SCIENCES-BASEL
卷 9, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/app9010120
关键词
polyisobutylene; homogeneous catalysis; green chemistry; chelation; sequestrant
类别
资金
- Qatar National Research Fund (QNRF)
- National Priorities Research Program [NPRP 9-246-1-054]
Ethanedithiol-functionalized polyisobutylene was prepared in one step by a photoinitiated thiol-ene click reaction starting from ethanedithiol and polyisobutylene (PIB). The functionalized oligomer product was then used as a soluble sequestrant for transition metals. This PIB-bound thioether-thiol ligand is phase selectively soluble in alkanes and it quantitatively sequesters common transition metals like Cu2+ and Pd2+ into an alkane phase, separating them from polar solvents in a biphasic liquid/liquid separation. The chelating thioether-thiol ligand was also successfully used to remove Cu and Pd transition metal catalyst residues from products in crude reaction mixtures in both azide/alkyne click reactions and cross-coupling reactions using a liquid/liquid extraction. Separation efficiencies exceeding 95% and in many cases 99% were achieved.
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