derived from salicylaldehyde and 2-hydroxy-1-naphthaldehyde were designed and investigated. The combination of five nonconjugated flexible spacers and five conjugated rigid spacers with four salicylaldehyde derivatives provided a series of forty complexes. The series of blue to red photoluminescent complexes was investigated by UV/Vis absorption and luminescence spectroscopy in solution and in the solid
设计并研究了一系列衍生自水杨醛和 2-羟基-1-萘醛的对称四齿席夫碱配体的有机金属螯合物。五个非共轭柔性间隔物和五个共轭刚性间隔物与四种水杨醛衍生物的组合提供了一系列四十种复合物。通过溶液和固态中的紫外/可见吸收和发光光谱以及循环伏安法研究了一系列蓝色到红色光致发光复合物。配体支架中桥的性质被确定为影响所研究的锌 (II) 配合物的吸收和发射颜色的主要参数。
Synthesis, Crystal Structures, and Luminescent Properties of Phenoxo-Bridged Heterometallic Trinuclear Propeller- and Sandwich-Like Schiff-Base Complexes
sandwich-type phenoxo-bridged Zn−M−Zn complexes. In the compounds Cd[Zn(La)Cl]2 (1), Cd[Zn(Lb)Cl]2}·H2O (2), Pb[Zn(Lb)Cl]2}·2H2O (4), Nd[Zn(La)Cl]2(H2O)}·0.5ZnCl4 ·2H2O (5), andMIII[Zn(La)Cl]2(H2O)}·0.5ZnCl4·2MeOH [M = Eu(7), Gd (9), Tb (11), and Dy (13)], two [Zn(L)Cl]− units coordinate to the central metal ion as a tetradentate ligand using its four oxygen atoms, forming a two-blade propeller-like left-handed
Schiff base tetranuclear Zn<sub>2</sub>Ln<sub>2</sub> single-molecule magnets bridged by hydroxamic acid in association with near-infrared luminescence
作者:Han Yan、Chu-Meng Wang、Peng Chen、Yi-Quan Zhang、Wen-Bin Sun
DOI:10.1039/d2dt00001f
日期:——
A series of Zn–Ln double-decker tetranuclear complexes display slow magnetic relaxation, in which Yb congeners show both slow magnetic relaxation and NIR properties. The magneto-structural and magneto-optical correlations are studied.
1D and 2D Zn–Ln coordination polymers based on compartment compounds: [ZnLn(L)(NO3)2(4-ppa)(EtOH)] and [ZnLn(L)(NO3)2(4-pca)(H2O)] (Ln = Eu, Tb; H2L = 1,3-bis((3-methoxysalicylidene)amino)propane; 4-Hppa = 4-pyridinepropionic acid; 4-Hpca = 4-pyridinecarboxylic acid)
作者:Ji Hun Lee、Seo Young Im、Soon W. Lee
DOI:10.1016/j.poly.2016.08.014
日期:2016.11
This paper describes the preparation of four 3d-4f (3d = Zn; 4f = Eu, Tb) coordination polymers and their emission quenching of the lanthanide ions. Two dinuclear Zn-Ln compartment compounds, [ZnLn(L) (NO3)(CH3CN)(H2O)(4)](NO3)(2)(H2O) (Ln = Eu, Tb), were prepared at room temperature by stirring an acetonitrile solution containing [Zn(L)] (H-2 L = 1,3-bis((3-methoxysalicylidene)amino)propane) and Ln (NO3)(3 center dot)n(H2O). When these compounds were treated with 4-pyridinepropionic acid (4-Hppa) under microwave-heating conditions, one-dimensional Zn-Ln coordination polymers were formed: [ZnLn(L) (NO3)(2)(4-ppa)(EtOH)] (Ln = Eu (1), Tb (2)). By contrast, these compounds reacted with pyridine-4-car-boxylic acid (4-Hpca) to give two-dimensional Zn-Ln coordination polymers: [ZnLn(L)(NO3)(2)(4-pca) (H2O)] (Ln = Eu (3), Tb (4)). All the compounds (1-4) exhibited the emission quenching of the Ln(3+) ion, probably due to the Ln(3+) -> Zn2+ energy transfer. (C) 2016 Elsevier Ltd. All rights reserved.
Assembly of a Heterotrimetallic Zn<sub>2</sub>Dy<sub>2</sub>Ir Pentanuclear Complex toward Multifunctional Molecular Materials