Synthesis of a Novel Electroactive ABA Triblock Copolymer and its Spontaneous Self‐Assembly in Water

Abstract

An electroactive triblock copolymer of poly(ethylene glycol) (PEG) and aniline pentamer (AP), PEG‐block‐AP‐block‐PEG (PAP), was synthesized via polycondensation in the presence of N,N'‐dicyclohexylcarbodiimide (DCC). The UV‐vis spectra and cyclic‐voltammograms (CV) spectra exhibited an excellent electroactivity of the triblock copolymer. The amphiphilic triblock copolymer self‐assembles spontaneously into uniform micellar aggregates when the triblock copolymer was added directly to the aqueous solution. The size of the aggregates can be changed with the oxidation state of the AP segment in the PAP copolymer and the aggregates were pH‐sensitive to the surrounding water solution, which provides a potential application in controlled drug release.magnified image

“Sandglass”‐Shaped Self‐Assembly of Coil–rod–coil Triblock Copolymer Containing Rigid Aniline‐Pentamer

“…[22] The transmission electron microscopy images and electron diffraction data were collected on a JEOL (JEM-1011) electron microscope, operating at an accelerating voltage of 100 kV. TEM samples were prepared by dropping a 0.…”

“…Recently, we reported the synthesis and characterization of a triblock copolymer PEG1500-b-AP-b-PEG1500 (PAP) of poly (ethylene glycol) (PEG) and aniline-pentamer (AP). [22] Emeraldine PAP (EM PAP) with an electroactive AP segment in the emeraldine state (EM AP) can spontaneously self-assemble into a large spherical micelle aggregation in dilute aqueous solutions. In this contribution, a special self-assembly morphology of EM PAP triblock copolymer in aqueous solution will be reported.…”

One‐step synthesis of a thienylenepyridazinylenethienylene‐based coil‐rod‐coil copolymer with enhanced emission and improved fluorescence stability

“…32,[43][44][45] End group modification strategy (Supporting Information Scheme S1) was attempted. By using a slight excess of monomer 2, the OEPETPT with terminal BCAH at both ends should be synthesized.…”

Self-assembly of Tetraaniline-PEG-Tetraaniline Block Copolymer Thin Films

“…研究发现, 苯胺齐聚物和聚苯胺光电性能相似 [10,11] , 在常用有机溶剂中溶解性较好, 而聚乙二醇(PEG)具有 离子传导能力高、 化学稳定性好、 无毒无害等优点 [12～14] , 因此制备 PEG 与具有电活性的苯胺齐聚物的嵌段共聚 物成为人们关注的热门课题之一. 危岩和解孝林教授 等 [4,15,16] 合成出一系列 PEG/苯胺齐聚物嵌段共聚物, 并 对其溶液自组装行为进行了深入研究. 本课题组合成了 DOI: 10.6023/A13101051 具有电活性的苯胺四聚体与聚乙二醇嵌段及星型共聚 物 [17] .…”