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首页> 外文期刊>Designed Monomers and Polymers >A Novel Type of Mono-Substituted Polyacetylene: Synthesis and Characterization of Poly(N-Propargylthiourea)s
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A Novel Type of Mono-Substituted Polyacetylene: Synthesis and Characterization of Poly(N-Propargylthiourea)s

机译：一种新型的单取代聚乙炔：聚（N-炔丙基硫脲）的合成与表征

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This article reports for the first time about a novel category of mono-substituted acetylene monomers (1–4, M1–M4) (C≡CCH_(2)NHCSNHR, R for M1 = CH_(2)CH_(3); M2 = (CH_(2))_(3)CH_(3); M3 = (CH_(2))_(5)CH_(3); M4 = C_(6)H_(5)). The four monomers were identified by FT-IR, ~(1)H-NMR, ~(13)C-NMR spectroscopy and elementary analysis. In the presence of a rhodium catalyst ((nbd)Rh~(+)B~(–)(C_(6)H_(5))_(4) (nbd = 2,5-norbornadiene)), M1–M4 underwent polymerization and provided the expected poly(N -propargylthiourea)s in a moderate to high yield (58–92%) and with a high cis content (≥91%) in the polymer backbones. The substituents had a big influence on the solubility of poly(N -propargylthioureas). Among the four polymers, polymer 4 (poly(4)) showed good solubility and relatively higher number-average molecular weight (up to 12 000). This polymer was further characterized by FT-IR and UV-Vis spectroscopy. TGA analysis demonstrated that the polymer remained stable up to 175° C. Poly(4) exhibited considerable adsorption ability toward to Fe~(3+) ions. The novel substituted polyacetylenes are also expected to exhibit some unique properties, such as inhibition of bacteria, chiral recognition, metal extraction and metal detection, derived from a combination of conjugated polymer backbones and highly functional thiourea groups in the side-chains.
机译：本文首次报道了一类新型的单取代乙炔单体（1-4，M1-M4）（C≡CCH_（2）NHCSNHR，R代表M1 = CH_（2）CH_（3）; M2 = （CH_（2））_（3）CH_（3）; M3 =（CH_（2））_（5）CH_（3）; M4 = C_（6）H_（5））。通过FT-IR，〜（1）H-NMR，〜（13）C-NMR光谱和元素分析鉴定了四种单体。在铑催化剂（（nbd）Rh〜（+）B〜（–）（C_（6）H_（5））_（4）（nbd = 2,5-降冰片二烯）的存在下，进行M1-M4聚合反应，并以中等至高收率（58-92％）和聚合物骨架中的高顺式含量（≥91％）提供了预期的聚（N-炔丙基硫脲）。取代基对聚（N-炔丙基硫脲）的溶解度有很大的影响。在这四种聚合物中，聚合物4（聚（4））显示出良好的溶解性和相对较高的数均分子量（最高12,000）。通过FT-IR和UV-Vis光谱进一步表征该聚合物。 TGA分析表明该聚合物在高达175℃下保持稳定。Poly（4）对Fe〜（3+）离子表现出相当大的吸附能力。新型取代的聚乙炔也有望表现出一些独特的性能，例如抑制细菌，手性识别，金属提取和金属检测，这些都是衍生自结合聚合物主链和侧链中高功能硫脲基团的组合。

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