Redox-switchable supramolecular graft polymer formation via ferrocene-cyclodextrin assembly.
Redox-switchable supramolecular graft polymer formation via ferrocene-cyclodextrin assembly.
复制标题
通过二茂铁-环糊精组装形成氧化还原可切换的超分子接枝聚合物
DOI:
10.1002/marc.201400122
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发表时间:
2014
影响因子:
4.6
通讯作者:
Ritter
中科院分区:
文献类型:
--
作者:
Szillat;Schmidt;B. V. K. J;Hubert;Barner-Kowollik;Ritter
The redox switchable formation of very well‐defined supramolecular graft polymers in aqueous solution driven by host–guest interactions between ferrocene (Fc) and cyclodextrin (CD) is presented. The Fc‐containing acrylic backbone copolymer (PDMA‐stat‐Fc) is prepared via reversible addition–fragmentation chain transfer (RAFT) copolymerization ofN,N‐dimethylacrylamide (DMA) and the novel monomerN‐(ferrocenoylmethyl)acrylamide (NFMA). Via the RAFT process, copolymers containing variable Fc ratios (5‐10 mol%) are prepared, affording polymers of molecular masses of close to 11 000 g mol−1and molar mass dispersities (Đ) of 1.2. The β‐cyclodextrin (β‐CD) containing building block is synthesized via RAFT‐polymerization, too, in order to afford a polymer with well‐defined molecular mass and low dispersity ( = 10 300 g mol−1,Đ= 1.1), employing a propargyl‐functionalized chain transfer agent for the polymerization ofN,N‐diethylacrylamide (DEA). The polymerization product is subsequently terminated with β‐CD via the regiospecific copper (I)‐catalyzed 1,3‐cycloaddition (PDEA‐βCD). Host–guest interactions between Fc and CD lead to the formation of supramolecular graft‐polymers, verified via nuclear Overhauser enhancement spectroscopy (NOESY). Importantly, their redox‐responsive character is clearly confirmed via cyclic voltammetry (CV). The self‐assembly of the statistical Fc‐containing lateral polymer chain in aqueous solution leads to mono‐ and multi‐core micelle‐aggregates evidenced via TEM. Only diffused cloud‐like, non‐spherical nanostructures are observed after addition of PDEA‐βCD (TEM).
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影响因子:
4.6
作者:
B. V. Schmidt;M. Hetzer;H. Ritter;C. Barner‐Kowollik
通讯作者:
B. V. Schmidt;M. Hetzer;H. Ritter;C. Barner‐Kowollik
影响因子:
4.6
作者:
Hetzer, Martin;Fleischmann, Carolin;Ritter, Helmut
通讯作者:
Ritter, Helmut
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
3.9
作者:
Feng, Chun;Lu, Guolin;Huang, Xiaoyu
通讯作者:
Huang, Xiaoyu
影响因子:
5.5
作者:
Hashidzume, A;Kawaguchi, A;Sato, T
通讯作者:
Sato, T