Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change
作者:Xiao Cheng、Kai Wang、Shuo Huang、Houyu Zhang、Hongyu Zhang、Yue Wang
DOI:10.1002/anie.201503914
日期:2015.7.13
highly efficient deep red to near‐infrared (NIR) emissive organic crystals 1–3 based on the structurally simple 2′‐hydroxychalcone derivatives were synthesized through a simple one‐step condensation reaction. Crystal 1 displays the highest quantum yield (Φf) of 0.32 among the reported organic single crystals with an emission maximum (λem) over 710 nm. Comparison between the bright emissive crystals 1–3
到近红外(NIR)发射有机晶体一系列高效深红色的1 - 3基于该结构简单的2'-羟基查耳酮衍生物通过简单的一步缩合反应合成。晶体1个显示最高的量子产率(Φ ˚F)之中的0.32报道有机单晶具有发射最大值(λ EM)超过710纳米。明亮的发光晶体之间的比较1 - 3和几乎不发光的化合物4 - 7显然提供了证据,表明微妙的结构修饰会引起巨大的性能变化,这对于设计新型高效有机发光材料具有指导意义。值得注意的是,结晶1 - 3个显示出放大自发辐射(ASE)具有极低的阈值。因此,红到近红外发射的晶体具有非常高的有机深Φ ˚F已经获得并且被发现显示NIR荧光晶体ASE的第一个例子。