amorphous glassy morphologies. Compared with their corresponding linear counterparts FL‐m (m=1–3), TrL‐n showed only little bathochromic shifts (5–12 nm) for the absorption maxima λmax in both solution and films. The star‐shaped ladder‐type compounds exhibited enhanced optical stability and suppressed low‐energy emission. Their EL spectra exhibited excellent stability with increasing the driving voltage
探索了一系列新颖的单分散星状梯形低聚对
苯撑,名为TrL- n(n = 1–3)。已经对它们的热和电
化学性质,荧光瞬态,光致发光量子产率,密度泛函理论计算,电致发光(EL)和放大的自发发射(A
SE)性质进行了系统研究,以阐明有关光电子性质的分子设计。所得材料显示出优异的结构完美性,没有
化学缺陷,并显示出很高的热稳定性(T d:404–418°C和T g:147–184°C)和无定形
玻璃态形态。与它们对应的线性对应物相比,FL -m(米= 1-3),TRL -n仅表现为吸收最大值小的红移(5-12纳米)λ最大在溶液和膜。星形梯形化合物显示出增强的光学稳定性并抑制了低能量发射。随着驱动电压从6 V增加到12 V,它们的EL光谱表现出极好的稳定性。此外,与FL ‐m相比,TrL ‐n记录了优异的低A
SE阈值。较低的A
SE阈值(每个脉冲29 nJ或1.60μJcm -2)记录了TrL-3,证明了它们