<i>syn</i>-Fluoro- and -Oxy-trifluoromethylation of Arylacetylenes
作者:Song-Lin Zhang、Hai-Xing Wan、Wen-Feng Bie
DOI:10.1021/acs.orglett.7b03229
日期:2017.12.1
One-step concurrent fluoro-trifluoromethylation across the triple bond of arylacetylenes in a syn mode is enabled by the collaboration of (phen)CuIII(CF3)3 and CsF that produces chemo-, regio-, and stereoselectively (Z)-α-fluoro-β-CF3 styrenes. This method can be extended to achieve syn-oxy-trifluoromethylation and syn-aryl-trifluoromethylation of alkynes using phenoxides, alkoxides, or phenylboronic
nucleobase-decorated tetrapodands exhibiting 1,3,5,7-tetraphenyladamantane and 9,9′-spirobifluorene central units are reported. 1,3,5,7-Tetraphenyladamantane and 3,3′,6,6′-tetrasubstituted 9,9′-spirobifluorene derivatives are tetrahedral building blocks, while the derivatives of 2,2′,7,7′-tetrasubstituted 9,9′-spirobifluorene can lead to 2D architectures. The CuAAC synthesis and the characterization of
Spiro Linkage as an Alternative Strategy for Promising Nonfullerene Acceptors in Organic Solar Cells
作者:Xiao-Feng Wu、Wei-Fei Fu、Zheng Xu、Minmin Shi、Feng Liu、Hong-Zheng Chen、Jun-Hua Wan、Thomas P. Russell
DOI:10.1002/adfm.201502413
日期:2015.10
This work focuses on developing diketopyrrolopyrrole (DPP)‐based small molecular nonfullereneacceptors for bulk heterojunction (BHJ) organicsolarcells. The materials, SF‐DPPs, have an X‐shaped geometry arising from four DPP units attached to a spirobifluorene (SF) center. The spiro‐dimer of DPP‐fluorene‐DPP is highly twisted, which suppresses strong intermolecular aggregation. Branched 2‐ethylhexyl
这项工作的重点是为本体异质结(BHJ)有机太阳能电池开发基于二酮基吡咯并吡咯(DPP)的小分子非富勒烯受体。SF-DPP材料具有X形的几何形状,这是由四个连接到螺二芴(SF)中心的DPP单元产生的。DPP-芴-DPP的螺二聚体高度扭曲,抑制了强烈的分子间聚集。选择支链的2-乙基己基(EH),线性正辛基(C8)和正十二烷基(C12)烷基侧作为取代基,以官能化DPP部分的N,N位以调节分子相互作用。SF‐DPPEH,SF‐DPP的最佳人选s系列与聚(3-己基噻吩)(P3HT)混合时,结晶度适中,J sc为6.96 mA cm -2,V oc为1.10 V,填充系数为47.5%,功率转换效率为3.63%。但是,SF-DPPC8和SF-DPPC12在其BHJ共混物中显示出较低的结晶度,这是其J sc降低的原因。使用乙炔桥将DPP单元与SF耦合产生SF‐A‐DPP分子。如此小的修改会导致形态特征截然
Ethynyl-linked perylene bisimide based electron acceptors for non-fullerene organic solar cells
作者:Changshi Yu、Yunhua Xu、Shijie Liang、Xudong Jiang、Guitao Feng、Cheng Li、Weiwei Li
DOI:10.1016/j.cclet.2017.08.016
日期:2018.2
spiro-aromatic cores linked with ethynyl units were developed as electronacceptors for non-fullerene organic solar cells. The ethynyl linkers were found to enhance the planarity of the conjugated backbone, resulting in high electron mobilities and near-infrared absorption. The ethynyl-linked PBI acceptors showed high power conversionefficiencies (PCEs) up to 4.27% due to the high short-circuit current density
摘要在这项工作中,具有螺-芳族核与乙炔基单元连接的星形per双酰亚胺(PBI)衍生物被开发为非富勒烯有机太阳能电池的电子受体。发现乙炔基连接基增强了共轭主链的平面性,导致高电子迁移率和近红外吸收。乙炔基连接的PBI受体由于高达8.52 mA / cm 2的高短路电流密度(J sc)和0.59的填充因子(FF)而显示出高达4.27%的高功率转换效率(PCE),而PBI受体没有乙炔基单元的非富勒烯太阳能电池的PCE较低,为3.57%。结果表明,乙炔基单元可用于设计新型PBI电子受体,具有改善的电荷传输性能和光伏性能。
Selective fluorescent sensors for gold(III) ion from N-picolyl sulfonamide spirobifluorene derivatives
quenching by Au(III) ion in acidic aqueous media solution with three-time-noise detection limits of 9.8 and 86.8 nM. The data from 1H-NMR, UV–vis spectroscopy, and the observation of the Tyndall effect strongly supported a static aggregation-induced quenching mechanism. The application of these sensors for quantitative analysis of spiked Au(III) ion in real water samples from 5 different sources resulted