镧系元素
多面体
螯合作用
发光
化学
组合化学
材料科学
无机化学
计算机科学
有机化学
光电子学
数学
组合数学
离子
作者
Xiaoqing Guo,Lipeng Zhou,Shao‐Jun Hu,Qing‐Fu Sun
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:53 (10): 4772-4780
摘要
Controlled self-assembly of predetermined multi-nuclear lanthanide organic polyhedra (LOPs) still presents a challenge, primarily due to the unpredictable coordination numbers and labile coordination geometries of lanthanide ions. In this study, through introducing triazole-based chelates to increase the chelating angle of C2-symmetric linear ligands and stabilize the coordination geometry of Eu(III) centers, M4L6-type (M = EuIII, L = ligand) tetrahedra were efficiently synthesized, especially a biphenyl-bridged ligand which is well known to form M2L3-type helicates. A series of LOPs were formed and characterized by high-resolution electrospray ionization time-of-flight mass spectroscopy (ESI-TOF-MS) and X-ray crystallography. Moreover, the europium complexes exhibit bright emission (luminescence quantum yield up to 42.4%) and circularly polarized luminescence properties (|glum| up to 4.5 × 10-2). This study provides a feasible strategy for constructing multi-nuclear luminescent LOPs towards potential applications.
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