Yang Liuqing, Hendsbee Arthur D, Xue Qin, He Shuijian, De-Jager Cindy R, Xie Guohua, Welch Gregory C, Ding Zhifeng
Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada.
Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada.
ACS Appl Mater Interfaces. 2020 Nov 18;12(46):51736-51743. doi: 10.1021/acsami.0c16238. Epub 2020 Nov 6.
An N-annulated perylene diimide dimer, tPDIN-hex, a graphene model compound with atomic precision, was investigated for luminescence applications. Electrochemiluminescence (ECL) of tPDIN-hex was studied with tri--propylamine (TPrA) as a reducing coreactant. ECL-voltage curves along with spooling ECL spectra provided details of light generation mechanisms. The relative ECL quantum efficiency of the Ru(bpy)(PF)/TPrA system was calculated to be 64%, which is superior to that of many other organic molecules because of the desired excited state in the absence of surface states. An organic light-emitting diode (OLED) fabricated with tPDIN-hex displayed bright orange-red emission with a low color temperature, which is very desirable. It is plausible that the sterically constrained and thus orthogonal aromatic moieties in the tPDIN-hex structure, with atomic precision graphene layer characteristics, lead to the excellent luminescence performances. The ECL and OLED studies of tPDIN-hex showcase great application potentials of tPDIN-hex in both solution-based ECL probes and solid-state light devices.
一种具有原子精度的石墨烯模型化合物——N-环化苝二酰亚胺二聚体tPDIN-hex，被用于发光应用研究。以三丙胺（TPrA）作为还原共反应物，研究了tPDIN-hex的电化学发光（ECL）。ECL电压曲线以及盘绕式ECL光谱提供了光生成机制的详细信息。计算得出Ru(bpy)(PF)/TPrA体系的相对ECL量子效率为64%，由于在没有表面态的情况下具有所需的激发态，该效率优于许多其他有机分子。用tPDIN-hex制备的有机发光二极管（OLED）发出明亮的橙红色光，色温较低，这是非常理想的。很可能是tPDIN-hex结构中具有空间受限且因此呈正交排列的芳香基团，具备原子精度的石墨烯层特征，从而导致了优异的发光性能。tPDIN-hex的ECL和OLED研究展示了tPDIN-hex在基于溶液的ECL探针和固态光器件中的巨大应用潜力。
