通过与手性冠醚的阳离子包合实现 CPL 活性杂化铜 (I) 卤化物,Science China Chemistry
通过与手性冠醚的阳离子包合实现 CPL 活性杂化铜 (I) 卤化物
Science China Chemistry
(
IF
9.7
)
Pub Date : 2024-08-22
, DOI:
10.1007/s11426-024-2052-2
Peng Fan
,
Li-Xuan Cai
,
Xiao-Fang Duan
,
Fan Yin
,
Chen-Chen Li
,
Zhong-Hua Deng
,
Xiao-Zhen Li
,
Qing-Fu Sun
具有高光致发光量子产率（PLQY）和优异的不对称因子（ g lum ）的手性杂化金属卤化物是圆偏振发光（CPL）发射源的有希望的候选者。然而，同时实现高亮度和大PLQY是一个巨大的挑战。在这里，我们报告了一种新的超分子策略，用于制造具有接近一致的量子产率和强烈的 CPL 发射的手性杂化 Cu(I)-卤化物。通过调节主客体络合可以显着调节不对称因子。由于主客体复合物的手性和可变构象，制备了一系列手性[G@L R/S ] 2 Cu 4 I 6 。手性 L R/S主体中不同阳离子的结合导致沿c轴的堆积模式的变化以及 [Cu 4 I 6 ] 2−多面体中不同程度的扭曲。其中，[H 3 O@L R/S ] +阳离子基于范德华相互作用堆叠，并在[H 3 O@L R/S ] 2 Cu 4中分层自组装成右/左手螺旋。 I 6 ，这导致-7×10 -3的高亮度和96.92%的大PLQY。值得注意的是，[G@L R/S ] 2 Cu 4 I 6在单组件白光发光二极管（WLED）中显示出有前景的应用，其最大不对称因子为-1。2×10 -3 。有效的主客体络合和定向分层自组装为高性能CPL材料的开发提供了有效的策略。
"点击查看英文标题和摘要"
CPL-active hybrid copper(I) halides enabled by cation inclusion with chiral crown-ether
Chiral hybrid metal halides with high photoluminescence quantum yield (PLQY) and superior dissymmetry factor (glum) are promising candidates for circularly polarized luminescence (CPL) emitting sources. However, it is a great challenge to achieve both high glum and large PLQY. Here, we report a new supramolecular strategy to fabricate chiral hybrid Cu(I)-halides with near-unity quantum yields and intense CPL emissions. The dissymmetry factor can be dramatically modulated by tuning the host-guest complexations. Attributing to the chirality and variable conformations of the host-guest complexes, a series of chiral [G@LR/S]2Cu4I6 have been prepared. The incorporation of different cations within the chiral LR/S hosts leads to variations of packing modes along the c-axis and different extent of distortions in the [Cu4I6]2−polyhedra. Among them, [H3O@LR/S]+ cations are stacked based on Van der Waals interactions and hierarchically self-assemble into a right/left-handed helix in [H3O@LR/S]2Cu4I6, which results in a high glum of −7×10−3 and a large PLQY of 96.92%. Notably, [G@LR/S]2Cu4I6 shows promising applications in single-component white light emitting diodes (WLEDs), exhibiting a maximum dissymmetry factor of −1.2×10−3. The effective host-guest complexation and oriented hierarchical self-assembly provide an effective strategy for the development of high-performance CPL materials.
更新日期：2024-08-27