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Issue 10, 2010
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Effect of solvents on polymerization of N-propargylamide monomer and secondary structure of polymer

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Abstract

Polymerization of M1, a chiral N-propargylamide monomer, was carried out with (nbd)Rh+B−(C6H5)4 as the catalyst in five solvents to explore the effect of solvents on polymerization. All the polymerizations occurred smoothly and provided polymers in high yield, however the number-average molecular weights of the polymers differ largely, which is attributed to the different solubility of the polymers in solvents. The helical structure and the optical activity of the polymer prepared in THF was examined by CD and UV-Vis spectroscopy measurements in the five solvents and in solvent mixtures consisting of CH2Cl2 (a relatively good solvent) and THF (a relatively not-so-good solvent) in varied ratios. The polymer could adopt helical conformations in all the solvents, but different CD intensities and UV-Vis absorptions were observed. In CH2Cl2, the polymer exhibited lower intensity in both CD effect and UV-Vis absorption, while they were higher when the polymer was examined in THF, demonstrating that solvophobic effects made large contribution for the polymer chains to adopt helical conformations.

Graphical abstract: Effect of solvents on polymerization of N-propargylamide monomer and secondary structure of polymer

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Publication details

The article was received on 16 Apr 2010, accepted on 22 Jun 2010 and first published on 27 Aug 2010


Article type: Paper
DOI: 10.1039/C0PY00116C
Citation: Polym. Chem., 2010,1, 1633-1637

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    Effect of solvents on polymerization of N-propargylamide monomer and secondary structure of polymer

    L. Tong, X. Liu, J. Deng and W. Yang, Polym. Chem., 2010, 1, 1633
    DOI: 10.1039/C0PY00116C

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