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Synthesis, characterization and aggregation-induced emission of alternating copolymers containing cyclophanes and tetraphenylethenes
Polymer ( IF 4.6 ) Pub Date : 2018-01-04 , DOI: 10.1016/j.polymer.2018.01.002
Chin-Yang Yu , Chia-Chieh Hsu

The alternating copolymers containing tetraphenylethenes bonded to pseudo-para or pseudo-meta [2.2]paracyclophanes were synthesized by palladium catalyzed Suzuki-Miyaura cross-coupling reaction. Relatively high molecular weights of polymers were obtained by the reaction of their corresponding comonomers using Pd(OAc)2 as a catalyst with S-Phos as a ligand and K3PO4 as a base under a high base to monomer ratio. The maximum emission intensity of polymer in THF increases gradually as the addition of water fraction increases. The polymers exhibited aggregation-induced emission in aggregated state. In particular, the photoluminescence quantum yield of those tetraphenylethenes bonded to pseudo-meta [2.2]paracyclophanes is up to 0.334 when the water fraction reaches to 90%. The polymers used in the detection of 2,6-dinitrotoluene are more sensitive than that of small molecule containing the same conjugated segment of the polymers. They are promising candidates for potential uses in the optoelectronic applications.



中文翻译:

含环烷和四苯基乙烯的交替共聚物的合成,表征和聚集诱导的发射

通过钯催化的Suzuki-Miyaura交叉偶联反应,合成了包含连接到拟对位或拟间位[2.2]对环环烯上的四苯基乙烯的交替共聚物。通过使用Pd(OAc)2作为催化剂,S-Phos作为配体和K 3 PO 4使相应的共聚单体反应,可以得到相对较高的聚合物分子量。在高的碱对单体比率下作为碱。随着水含量的增加,聚合物在THF中的最大发射强度逐渐增加。聚合物在聚集状态下表现出聚集诱导的发射。尤其是,当水含量达到90%时,键合到假间位[2.2]对环环烷烃上的那些四苯基乙烯的光致发光量子产率高达0.334。用于检测2,6-二硝基甲苯的聚合物比包含相同共轭链段的小分子更敏感。它们是光电子应用潜在用途的有希望的候选者。

更新日期:2018-01-04
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