Synthesis, photophysical, and theoretical studies on π‐conjugated copolymers based on benzothiadiazole and cyanopyridine acceptor moieties along with other π‐bridge units
作者:Ashraf A. El‐Shehawy、Mohamed E. Abdu、Morad M. El‐Hendawy、Mohamed El‐Khouly、Mohamed H. Sherif、Hamed Y. Moustafa
DOI:10.1002/poc.4158
日期:2021.4
A set of π‐conjugated copolymers were synthesized via Pd‐catalyzed cross‐coupling based on benzothiadiazole and cyanopyridine moieties along with other π‐bridge units (thiophene and/or benzene). Their chemical structures were confirmed by various analytical techniques (elemental, IR, 1H, and 13C NMR analyses). All copolymers showed good solubility in most common organic solvents. Thermogravimetric
通过基于苯并噻二唑和氰基吡啶部分以及其他π桥单元(噻吩和/或苯)的Pd催化交叉偶联合成了一组π共轭共聚物。它们的化学结构已通过各种分析技术(元素,IR,1 H和131 H NMR分析。所有共聚物在大多数常见有机溶剂中均显示出良好的溶解性。热重分析(TGA)分析表明它们具有良好的热稳定性,在高达260°C的温度下没有明显的重量损失。估计的薄膜光学带隙在2.25–2.62 eV的范围内。发现π桥单元(苯和/或噻吩)显着影响共聚物的分子结构和光电性能。它们在稀释溶液中显示出良好的荧光,其中通过在526.0–532.0 nm范围内的波长进行辐射激发获得荧光发射光谱。X射线衍射(XRD)显示,所有共聚物在2θ= 22.5–23处均显示对称的卤素峰。8°对应于烷基侧链的存在,此外在〜2°处的2θ处有一个小的强度峰,这表明薄膜中存在一定程度的残留物,在某些范围内具有结晶性。密度泛函理论(DFT)和随时间
New cyanopyridine based conjugated polymers carrying auxiliary electron donors: From molecular design to blue emissive PLEDs
respectively as determined by GPC technique. Furthermore, the new polymers PPy1-3, were shown to be stable thermally up to 308–347 °C. Evidently, they exhibited good photophysical behavior with their optical energy band gaps of 2.53–2.63 eV. Finally, the polymers PPy1-3 were employed as an active emissive layer in standard ITO/PEDOT:PSS/Polymer/Al configured PLEDs. Interestingly, at 12 V all the newly
Synthesis, characterization and electroluminescence studies of cyanopyridine-based π-conjugative polymers carrying benzo[<i>c</i>][1,2,5]thiadiazole and naphtho[1,2-<i>c</i>:5,6-<i>c</i>′]bis([1,2,5]thiadiazole) units
Four new cyanopyridine based polymers, i.e.TDPy1-4 were designed, synthesized and well-characterized. The detailed studies reveal that the polymers own all the prerequisites required for the PLED application as active green light emitters.
One-Pot Synthesis of 4,6-Diaryl-2-oxo(imino)-1,2-dihydropyridine-3-carbonitrile; a New Scaffold for p38α MAP Kinase Inhibition
作者:Aya M. Serry、Sabine Luik、Stefan Laufer、Ashraf H. Abadi
DOI:10.1021/cc1000488
日期:2010.7.12
multicomponent reaction of the appropriate acetophenone, aromaticaldehyde, ammonium acetate, and malononitrile or ethyl cyanoacetate. The products were obtained with excellent yields. The prepared compounds were evaluated for their in vitro ability to inhibit p38 alpha-MAP kinase. Several compounds showed p38 MAP kinase inhibitory properties with IC(50) as low as 0.07 microM. This is the first time to report
New blue emissive conjugated small molecules with low lying HOMO energy levels for optoelectronic applications
作者:C. Trupthi Devaiah、B. Hemavathi、T.N. Ahipa
DOI:10.1016/j.saa.2016.12.035
日期:2017.3
of the solvent greatly influenced the spectra. The electrochemical studies were carried out using cyclic voltammetry to calculate the HOMO-LUMO energy levels. The study revealed that the synthesized conjugated small molecules possess low lying HOMO energy levels which can be exploited for application in various fields of optoelectronics.