Highly emissive hand-shaped π-conjugated alkynylpyrenes: Synthesis, structures, and photophysical properties
作者:Jian-Yong Hu、Xin-Long Ni、Xing Feng、Masanao Era、Mark R. J. Elsegood、Simon J. Teat、Takehiko Yamato
DOI:10.1039/c2ob06865f
日期:——
Three alkynyl-functionalised, hand-shaped, highly fluorescent and stable emitters, namely, 2-tert-butyl-4,5,7,9,10-pentakis(p-R-phenylethynyl)pyrenes have been successfully synthesized via a Pd/Cu-catalysed Sonogashira cross-coupling reaction. The chemical structures of the alkynylpyrenes were fully characterized by their 1H/13C NMR spectra, mass spectroscopy and elemental analysis. Synchrotron single-crystal X-ray analysis revealed that there is a 1-D, slipped, face-to-face motif with off-set, head-to-tail stacked columns, which are clearly influenced by the single, bulky, tert-butyl group in the pyrene ring at the 2-position. Detailed studies on the photophysical properties in both solutions and thin films strongly indicate that they might be promising candidates for optoelectronic applications, such as organic light-emitting devices (OLEDs) or as models for investigating the fluorescent structureâproperty relationship of the alkynyl-functionalised pyrene derivatives.
三种炔基功能化、手形、高荧光且稳定的发射体,即2-叔丁基-4,5,7,9,10-五(对-R-苯乙炔基)芘已通过Pd/Cu-成功合成催化Sonogashira交叉偶联反应。炔基芘的化学结构通过 1H/13C NMR 谱、质谱和元素分析得到了充分表征。同步加速器单晶 X 射线分析表明,存在一个一维、滑动、面对面的图案,具有偏移、头尾相连的堆叠柱,这明显受到单一、大体积、叔-芘环2位上有丁基。对溶液和薄膜中光物理性质的详细研究强烈表明,它们可能是光电应用的有希望的候选者,例如有机发光器件(OLED)或作为研究炔基-荧光结构与性质关系的模型。功能化芘衍生物。