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Updated: Sep 22, 2025

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Ring-Opening Metathesis Polymerization by a Ru Phosphine Derivative of Cyclodextrin in Water
Yoshinori Takashima1, Kunio Uramatsu1, Daisuke Jomori1
1Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Abstract:
Trimethylated cyclodextrins with a phosphine ligand and ruthenium (PCy2Ru-CDs) realize supramolecular polymerization catalysts for ring-opening metathesis polymerization (ROMP). Although PCy2Ru-βCD shows a low polymerization activity for 7-oxanorbornene dimethanol (7-ONorOH2) in organic solvents, it exhibits a high ROMP activity for 7-ONorOH2 in aqueous solutions. The ROMP activity of PCy2Ru-βCD is higher than that of PCy2Ru-αCD. The addition of competitive guest molecules decreases the polymer yield, indicating that complexation between PCy2Ru-CD and 7-ONorOH2 in water plays an important role in the increased polymer yield.
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