[Rh(L-alaninate)(1,5-cyclooctadiene)] catalyzed helix-sense-selective polymerizations of achiral phenylacetylenes

5Citations
Citations of this article
7Readers
Mendeley users who have this article in their library.

Abstract

The [Rh(L-alaninate)(cod)] (cod = 1,5-Cyclooctadiene) complex was synthesized and characterized. Asymmetric polymerizations of achiral phenylacetylene with two hydroxyl groups and a dodecyl group (DoDHPA) were performed by using the rhodium complex as the catalyst to provide polymers with a higher molecular weight (>105) than the polymers obtained using the [Rh(cod)Cl]2 initiator systems. The resulting polymers showed circular dichroism (CD) signals at approximately 310 and 470 nm, indicating that they have a preferential one-handed helical structure. The helix sense in the polymer main chain was controlled by the sign of the catalyst chirality. These findings suggest that the rhodium complex with a chiral amine is the true active species for the helix-sense-selective polymerization of DoDHPA. The [Rh(L-alaninate)(cod)] complex also exhibits high catalytic activity in the polymerization of phenylacetylene (PA) to give a high yield and molecular weight. All these results demonstrate that this Rh complex is an excellent catalyst for the polymerization of phenylacetylene monomers.

Cite

CITATION STYLE

APA

Wang, Q., Jia, H., Shi, Y., Ma, L., Yang, G., Wang, Y., … Aoki, T. (2018). [Rh(L-alaninate)(1,5-cyclooctadiene)] catalyzed helix-sense-selective polymerizations of achiral phenylacetylenes. Polymers, 10(11). https://doi.org/10.3390/polym10111223

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free