State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Inorg Chem. 2011 Jun 6;50(11):4825-31. doi: 10.1021/ic102554j. Epub 2011 May 10.
Four diboron-bridged ladder molecules 1-4 have been designed and synthesized. X-ray diffraction analysis revealed that the bulky phenyl substituents on boron centers efficiently prevented π stacking of the luminescent ladder unit. Characterizations of these complexes demonstrated that the construction of diboron-containing ladder-type skeletons endowed these materials with good thermal stability, high fluorescence quantum yields, and strong electron affinity. The highly efficient nondoped organic light-emitting diodes using complexes 1 and 2 as electron-transporting emitters exhibited maximum luminance values of 16,930 and 18,060 cd/m(2) with turn-on voltages of 3.5 and 2.5 V as well as maximum luminous efficiencies of 6.4 and 5.4 cd/A, respectively.
已经设计和合成了四个二硼桥联的梯形分子 1-4。X 射线衍射分析表明，硼中心上的大体积苯基取代基有效地阻止了发光梯形单元的π堆积。这些配合物的特性表明，二硼含梯形骨架的构建赋予了这些材料良好的热稳定性、高荧光量子产率和强电子亲和力。使用配合物 1 和 2 作为电子传输发射体的高效无掺杂有机发光二极管的最大亮度值分别为 16930 和 18060 cd/m²，开启电压分别为 3.5 和 2.5 V，最大发光效率分别为 6.4 和 5.4 cd/A。
