Heteroleptic Copper(I) Pseudorotaxanes Incorporating Macrocyclic Phenanthroline Ligands of Different Sizes
作者:Meera Mohankumar、Michel Holler、Eric Meichsner、Jean-François Nierengarten、Frédéric Niess、Jean-Pierre Sauvage、Béatrice Delavaux-Nicot、Enrico Leoni、Filippo Monti、Joanna M. Malicka、Massimo Cocchi、Elisa Bandini、Nicola Armaroli
DOI:10.1021/jacs.7b12671
日期:2018.2.14
singlet-triplet energy gap compared to the reference compound [Cu(dmp)(POP)]+ (dmp = 2,9-dimethyl-1,10-phenanthroline) and within the pseudorotaxane series. The system with the largest ring ([Cu(m42)(POP)]+) has been tested as emissive material in OLEDs and affords bright green devices with higher luminance and greater stability compared to [Cu(dmp)(POP)]+, which lacks the macrocyclic ring. This highlights
由双[2-(二苯基膦)苯基]醚(POP)和不同环尺寸(m30、m37和m42)的大环菲咯啉配体制备了一系列铜(I)假轮烷。对所得 [Cu(mXX)(POP)]+ (mXX = m30、m37 和 m42) 衍生物进行的变温研究揭示了由于大环配体折叠导致的动态构象平衡。已在 CH2Cl2 中研究了拟轮烷的吸收和发光特性。它们表现出金属到配体的电荷转移发射,光致发光量子产率 (PLQY) 范围为 20-30%。最小的系统 [Cu(m30)(POP)]+ 与其类似物相比在光谱形状和位置上的差异很小,表明配位环境略有扭曲。PLQY 在聚(甲基丙烯酸甲酯)薄膜中显着增强(~40-45%)。粉末样品的发射光谱和激发态寿命作为温度 (78-338 K) 的函数的研究揭示了热激活延迟荧光,与参考化合物 [Cu(dmp) (POP)]+ (dmp = 2,9-二甲基-1,10-菲咯啉) 和假轮烷系列。具有最大环