Exploring the Structural Diversity of DNA Bottlebrush Polymers Using an Oligonucleotide Macromonomer Approach.

Exploring the Structural Diversity of DNA Bottlebrush Polymers Using an Oligonucleotide Macromonomer Approach.
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DOI:
10.1021/acs.macromol.1c02624
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发表时间:
2022-03-22
期刊:
影响因子:
5.5
通讯作者:
Zhang, Ke
Zhang, Ke
中科院分区:
化学1区
文献类型:
--
作者:
Lu, Hao;Cai, Jiansong;Fang, Yang;Ren, Mengqi;Tan, Xuyu;Jia, Fei;Wang, Dali;Zhang, Ke

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在此,我们证明由有机物可溶、化学保护的寡核苷酸(protDNA)和聚(乙二醇)(PEG)链组成的大单体可以通过开环复分解聚合(ROMP)转化为具有不同结构的瓶刷聚合物。使用定制的含降冰片烯亚磷酰胺,获得了两种类型的大单体:线性降冰片烯-protDNA-PEG结构和Y形结构,其中可聚合降冰片烯基团位于protDNA和PEG相遇的连接处。通过这种策略,PEG链可以放置在洗瓶刷主干附近或其外围,原则上通过调整降冰片烯位置可以放置在这两个极端之间的任何位置,这使得该策略对于构建结构复杂的含寡核苷酸的共聚物具有吸引力。
Herein, we demonstrate that macromonomers consisting of organics-soluble, chemically protected oligonucleotides (protDNA) and poly(ethylene glycol) (PEG) chains can be converted into bottlebrush polymers of distinct architectures via ring-opening metathesis polymerization (ROMP). Using a custom norbornene-containing phosphoramidite, two types of macromonomers were obtained: a linear norbornene-protDNA-PEG structure and a Y-shaped structure where the polymerizable norbornene group is situated at the junction where protDNA and PEG meet. With this strategy, the PEG chains can be placed either near the backbone of the bottlebrush or on its periphery, and in principle anywhere between these two extremes by adjusting the norbornene location, which makes this strategy attractive for constructing architecturally sophisticated oligonucleotide-containing copolymers.
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