Controlled Formation and Binding Selectivity of Discrete Oligo(methyl methacrylate) Stereocomplexes.

Controlled Formation and Binding Selectivity of Discrete Oligo(methyl methacrylate) Stereocomplexes.
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DOI:
10.1021/jacs.7b13095
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发表时间:
2018-02-07
影响因子:
15
通讯作者:
Hawker CJ
Hawker CJ
中科院分区:
化学1区
文献类型:
--
作者:
Ren JM;Lawrence J;Knight AS;Abdilla A;Zerdan RB;Levi AE;Oschmann B;Gutekunst WR;Lee SH;Li Y;McGrath AJ;Bates CM;Qiao GG;Hawker CJ

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聚甲基丙烯酸甲酯(PMMA)的三螺旋立体复合物是多链合成螺旋的一个独特例子,在材料科学和纳米技术中具有重要的实用性和前景。为了获得基本的理解的基本组装过程中,离散的有规立构的寡聚体库,通过结合立体特异性聚合技术与自动快速色谱纯化。这些离散结构单元的立体复合物组装使得能够鉴定(1)立体复合物形成所需的最小聚合度和(2)螺旋结晶模式对组装前体长度的依赖性。更重要的是,我们的实验解决了具有相似分子量的螺旋链之间的结合选择性。这为基于三螺旋基序的下一代聚合物材料的开发提供了新的机会。
The triple-helix stereocomplex of poly(methyl methacrylate) (PMMA) is a unique example of a multistranded synthetic helix that has significant utility and promise in materials science and nanotechnology. To gain a fundamental understanding of the underlying assembly process, discrete stereoregular oligomer libraries were prepared by combining stereospecific polymerization techniques with automated flash chromatography purification. Stereocomplex assembly of these discrete building blocks enabled the identification of (1) the minimum degree of polymerization required for the stereocomplex formation and (2) the dependence of the helix crystallization mode on the length of assembling precursors. More significantly, our experiments resolved binding selectivity between helical strands with similar molecular weights. This presents new opportunities for the development of next-generation polymeric materials based on a triple-helix motif.
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