Indexed by:Journal Papers

Date of Publication:2015-10-13

Journal:MACROMOLECULES

Included Journals:Scopus、EI、SCIE

Volume:48

Issue:19

Page Number:6941-6947

ISSN:0024-9297

Abstract:The spectroscopic assignment of poly(cyclopentene carbonate)s at the diad level was performed by using two kinds of model compounds: isotactic and syndiotactic dimers of cyclopentene carbonate unit. By comparing the signals in the carbonyl region, we concluded that the signals at 153.85 and 153.78 ppm in the C-13 NMR spectrum of poly(cydopentene carbonate) were attributed to m-diad and r-diad, respectively. The signals at 82.61 and 82.53 ppm in the C-13 NMR spectrum were assigned to m-diad and r-diad peak of methine resonance, respectively. It was found that the carbonate carbon signals were sensitive toward the stereocenters on adjacent epoxide ring-opening units. The syndiotactic and isotactic diads matched well with the microstructures of the stereoregular poly(cydopentene carbonate)s that were prepared by using chiral dinuclear Co(III) complex catalysts.