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首页> 外文期刊>RSC Advances >Optoelectrical, morphological and mechanical features of nitrophenyl supported poly(1,3,4-oxadiazole)s and their nanocomposites with TiO2
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Optoelectrical, morphological and mechanical features of nitrophenyl supported poly(1,3,4-oxadiazole)s and their nanocomposites with TiO2

机译：硝基苯基负载（1,3,4-恶二唑）及其纳米复合材料的光电，形态学和力学特征及其纳米复合材料与TiO2

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摘要

Two nitro phenyl supported poly(1,3,4-oxadiazole)s viz. ; poly(pyridine(2-nitrophenyl)-1,3,4-oxadiazole) [PPNO] and poly(2-( o -nitrophenyl)-5-phenyl-1,3,4-oxadiazole) [PNPPO] were initially synthesized by a dehydrocyclization reaction, and then reinforced with TiO _(2) nanoparticles. They were characterized in terms of optoelectrical, morphological and mechanical properties in order to examine their suitability to function as active or electron transport layers in polymer light emitting diodes (PLEDs). The nanocomposites have been found to possess charge transfer characteristics from the macromolecular systems (PPNO or PNPPO) to TiO _(2) particles, upon photo-excitation. Cyclic voltammetric examinations indicated a reduction in band gap for PPNO and PNPPO in the presence of TiO _(2) nanoparticles. The nonlinear optical responses and optical limiting behavior of PPNO, PNPPO and their nanocomposites were also evaluated by the Z-scan technique, using nanosecond Nd:YAG, 532 nm laser radiations. In view of user-friendly device fabrication, flexible films of PPNO and PNPPO were fabricated by blending the composites with 2 wt% of poly(methylmethacrylate). Along with good mechanical properties, PPNO and PNPPO showed high fluorescent quantum yield, presenting them as promising candidates for PLED fabrication. Interestingly, the current–voltage ( I – V ) characteristics propose their additional application as semiconducting packaging materials for optoelectronic devices.
机译：两种硝基苯基负载聚（1,3,4-恶二唑）的viz。 ;聚（吡啶（2-硝基苯基）-1,3,4-恶二唑）[PPNO]和聚（2-（O-硝基苯基）-5-苯基-1,3,4-恶二唑）[PNPPO]最初被合成脱氢环化反应，然后用TiO _（2）纳米颗粒增强。它们的特征在于光电，形态学和机械性能，以检查它们在聚合物发光二极管（PLEDS）中用作有源或电子传输层的适用性。已经发现纳米复合材料在光激发时从大分子系统（PPNO或PNPPO）中具有来自大分子系统（PPNO或PNPPO）至TiO _（2）颗粒的电荷转移特性。循环伏安检查表明在TiO _（2）纳米粒子存在下PPNO和PNPPO的带隙的降低。通过Z扫描技术，使用纳秒Nd：YAG，532nm激光辐射，评估PPNO，PNPPO及其纳米复合材料的非线性光学响应和光学限制性。考虑到用户友好的装置制造，通过将具有2wt％的聚（甲基丙烯酸甲酯）的复合材料混合来制造PPNO和PNPPO的柔性薄膜。除了良好的机械性能之外，PPNO和PNPPO显示出高荧光量子产量，将它们作为镀金制造的承诺候选者。有趣的是，电流电压（I-V）特性提出其作为光电器件的半导体包装材料的附加应用。

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