Details

Autor(en) / Beteiligte

• Broderick, Erin M
• Guo, Neng
• Vogel, Carola S
• Xu, Cuiling
• Sutter, Jörg
• Miller, Jeffrey T
• Meyer, Karsten
• Mehrkhodavandi, Parisa
• Diaconescu, Paula L

Titel

Redox Control of a Ring-Opening Polymerization Catalyst

Ist Teil von

• Journal of the American Chemical Society, 2011-06, Vol.133 (24), p.9278-9281

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2011

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The activity of an yttrium alkoxide complex supported by a ferrocene-based ligand was controlled using redox reagents during the ring-opening polymerization of l-lactide. The oxidized complex was characterized by X-ray crystallography and 1H NMR, XANES, and Mössbauer spectroscopy. Switching in situ between the oxidized and reduced yttrium complexes resulted in a change in the rate of polymerization of l-lactide. Synthesized polymers were analyzed by gel permeation chromatography. Polymerization of trimethylene carbonate was also performed with the reduced and oxidized forms of an indium alkoxide complex. The indium system showed the opposite behavior to that of yttrium, revealing a metal-based dependency on the rate of polymerization.