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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis, structural and spectral properties of an ionic polyacetylene: Poly[N-(5-nitro-2-furanmethylene)-2-ethynylpyridinium bromide]
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Synthesis, structural and spectral properties of an ionic polyacetylene: Poly[N-(5-nitro-2-furanmethylene)-2-ethynylpyridinium bromide]

机译：离子型聚乙炔的合成，结构和光谱性质：聚[N-（5-硝基-2-呋喃亚甲基）-2-乙炔基溴化吡啶鎓]

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摘要

A new ionic polyacetylene was prepared by the activation polymerization of 2-ethynylpyridine with 2-(bromomethyl)-5-nitrofuran in high yield without any additional initiator or catalyst. This polymerization proceeded well in a homogeneous manner to give a high yield of the polymer (92%). The activated acetylenic triple bond of N-(5-nitro-2-furanmethylene)-2-ethynylpyridinium bromide, formed in the first quaternerization process, was found to be susceptible to linear polymerization. This polymer was completely soluble in such polar organic solvents as dimethylformamide, dimethyl sulfoxide, and N,N-dimethylacetamide. The inherent viscosities of the resulting polymers were in the range 0.12-0.19 dL/g, and X-ray diffraction analysis data indicated that this polymer was mostly amorphous. The polymer structure was characterized by various instrumental methods to have a polyacetylene backbone structure with the designed substituent. The photoluminescence peak was observed at 593 nm; this corresponded to a photon energy of 2.09 eV. The polymer exhibited irreversible electrochemical behaviors between the doping and undoping peaks.
机译：通过2-乙炔基吡啶与2-（溴甲基）-5-硝基呋喃的活化聚合反应制备了新的离子型聚乙炔，而无需任何额外的引发剂或催化剂。该聚合反应以均匀的方式进行得很好，从而得到高产率的聚合物（92％）。发现在第一个季铵化过程中形成的N-（5-硝基-2-呋喃亚甲基）-2-乙炔基溴化吡啶的活化的炔基三键易于线性聚合。该聚合物完全溶于诸如二甲基甲酰胺，二甲基亚砜和N，N-二甲基乙酰胺的极性有机溶剂中。所得聚合物的比浓对数粘度在0.12-0.19dL / g的范围内，并且X射线衍射分析数据表明该聚合物大部分为无定形的。该聚合物结构通过各种仪器方法表征为具有带有设计的取代基的聚乙炔主链结构。在593nm处观察到光致发光峰。这相当于2.09 eV的光子能量。该聚合物在掺杂和未掺杂峰之间表现出不可逆的电化学行为。

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