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首页> 外文期刊>Chemistry: A European journal >Conjugated hyperbranched poly(aryleneethynylene)s: Synthesis, photophysical properties, superquenching by explosive, photopatternability, and tunable high refractive indices
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Conjugated hyperbranched poly(aryleneethynylene)s: Synthesis, photophysical properties, superquenching by explosive, photopatternability, and tunable high refractive indices

机译：共轭超支化聚（亚芳基乙炔基）：合成，光物理性质，通过爆炸的超猝灭，光图案化性和可调的高折射率

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摘要

Triphenylamine (TPA)-based conjugated hyperbranched poly(aryleneethynylene) s (PAEs), hb-P1/2, hb-P1/3, and hb-P1/4, were synthesized with high molecular weights and good solubilities through Sonogashira coupling reactions. These PAEs exhibited outstanding thermal stabilities and different emission behaviors. Tetraphenylethene (TPE)-containing hb-P1/2 fluoresced faintly in THF, although its light emission was enhanced by aggregate formation in aqueous media or in thin films, thereby exhibiting an aggregation-induced emission-enhancement (AIEE) effect. Whereas 1,1,2,3,4,5-hexaphenylsilole (HPS)-bearing hb-P1/3 showed no significant change in emission intensity with increasing water content in aqueous media, hb-P1/4, which consisted of TPA-fluorenone donor-acceptor groups, presented almost identical absorptions, but both positive and negative solvatochromic emissions in various solvents. A superquenching effect was observed in the picric-acid-detection process by using nanosuspensions of hb-P1/2. All of the polymers possessed good film formability. UV irradiation of the thin films induced simultaneous photobleaching and cross-linking, thus making them applicable in the fabrication of 2D and 3D patterns. Furthermore, the polymer films also showed high refractive indices, which were tunable upon exposure to UV light. Branching out: Soluble, conjugated hyperbranched poly(aryleneethynylene)s (hb-PAEs) exhibit outstanding thermal stabilities and intriguing photophysical properties, such as aggregation-induced emission enhancement. These hb-PAEs also enjoy excellent film formability, photopatternability, and tunable high refractive indices, which render them promising candidates in optoelectronic applications.
机译：通过Sonogashira偶联反应合成了具有高分子量和良好溶解性的基于三苯胺（TPA）的共轭超支化聚（亚芳基乙炔基）s（PAE），hb-P1 / 2，hb-P1 / 3和hb-P1 / 4。这些PAE具有出色的热稳定性和不同的发射行为。含四苯乙烯（TPE）的hb-P1 / 2在THF中微弱发荧光，尽管其光发射通过在水性介质或薄膜中形成聚集体而得以增强，从而表现出聚集诱导的发射增强（AIEE）效应。带有1,1,2,3,4,5-六苯基甲硅烷基（HPS）的hb-P1 / 3在水介质hb-P1 / 4（由TPA-芴酮供体-受体基团的吸收几乎相同，但在各种溶剂中均呈现正负溶剂溶变色。通过使用hb-P1 / 2的纳米悬浮液，在苦味酸检测过程中观察到了超猝灭作用。所有的聚合物都具有良好的成膜性。薄膜的紫外线照射引起了同时的光漂白和交联，因此使其可用于2D和3D图案的制造。此外，聚合物膜还显示出高折射率，该折射率在暴露于紫外光时可调节。分支：可溶性共轭超支化聚亚芳基乙炔（hb-PAE）具有出色的热稳定性和令人着迷的光物理特性，例如聚集诱导的发射增强。这些hb-PAE还具有出色的成膜性，光图案化性和可调的高折射率，这使其成为光电子应用中的有希望的候选者。

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