Cyclic Trinuclear Copper(I) Complex Exhibiting Aggregation-Induced Emission: A Novel Fluorescent Probe for the Selective Detection of Gold(III) Ions
作者:Haozhen Li、Jie Luo、Zhi-Yin Zhang、Rong-Jia Wei、Mo Xie、Yong-Liang Huang、Guo-Hong Ning、Dan Li
DOI:10.1021/acs.inorgchem.1c03049
日期:2022.1.10
Coordination complexes with aggregation-induced-emission (AIE) behavior has drawn much attention because of their promising applications. Conventionally, the AIE-active metal–organic complexes are prepared from an AIE-active organic ligand, and the construction of such coordination complexes from aggregation-caused-quenching (ACQ) ligands is still challenging. Herein, we have synthesized two new cyclic trinuclear
具有聚集诱导发射 (AIE) 行为的配位配合物因其应用前景广阔而备受关注。传统上,具有 AIE 活性的金属有机配合物是由具有 AIE 活性的有机配体制备的,而从聚集引起的猝灭 (ACQ) 配体构建这种配位配合物仍然具有挑战性。在此,我们合成了两种新的环状三核配合物 (CTC),即1和2,由铜 (I) 和银 (I) 以及 ACQ 配体 [4-(3,5-dimethyl-1 H -pyrazol-4) -基)苯甲醛,HL ]。( 1)表现出AIE行为,当它聚集时发射强度增强~20倍,这可归因于其紧密堆积和抑制分子内旋转的多个分子间氢键,单晶X射线衍射分析证实。另一方面,(2)表现出ACQ效应,当它聚集时发射强度降低了~5倍。此的ACQ行为2与它松散包装和在晶体中的配位体的自由旋转,从而导致非辐射衰变和荧光淬灭。有趣的是,CTC 1和2都对金 (III) 离子表现出良好的亲和力,从而可以选择性地