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合成了一种新型含薄荷醇基苯氧基丙炔膦酰胺单体(1a)和含不同长度MPEG侧链的丙炔酸酯单体(1b～3b).采用柱层析及诱导结晶拆分对映体(1a),31P-NMR表征可知对映体1a可成功拆分,以(nbd)Rh+[η6-C6H5B-(C6H5)3]为催化剂,对单体1a进行均聚,单体1a与1b～3b进行共聚,制得产率42.6%～80.3%,相对数均分子量Mn=1.8×104～2.4×104的聚合物.圆二色光谱(CD)紫外(UV-Vis)表征发现聚合物具有很强的光学活性且能形成单一方向的螺旋构象.探究发现随共聚物中b嵌段分子量增加其螺旋性能逐渐增强,研究发现不同配比的CH3Cl/CH3OH混合溶剂对均聚物及共聚物二级结构的影响差异显著.聚合物在不同溶剂中可以组装成球形以及棒状等形态.
A novel menthyl phenoxypropionyl phosphonamide monomer (1a) and propiolate monomers (1b ~ 3b) with different length of MPEG side chain were synthesized.It was identified by column chromatography and induced crystallization Enantiopure (1a), 31P-NMR characterization showed that enantiomer 1a was successfully resolved and monomer 1a was homopolymerized with (nbd) Rh + [η6-C6H5B- (C6H5) 3] And 1b ~ 3b copolymerized to obtain the yield of 42.6% ~ 80.3%, the relative molecular weight of Mn = 1.8 × 104 ~ 2.4 × 104. Circular dichroism (CD) UV-Vis characterization of the polymerization Has a strong optical activity and can form a single direction of the helical conformation.It is found that with the molecular weight of the b block copolymer increases its helical properties gradually increased, the study found different proportions of CH3Cl / CH3OH mixed solvent homopolymer and copolymerization The secondary structure of the difference is significant.The polymer can be assembled in different solvents into spherical and rod-like morphology.