Anion-Dependent Cu(II) Coordination Polymers: Geometric, Magnetic and Luminescent Properties
Anion-Dependent Cu(II) Coordination Polymers: Geometric, Magnetic and Luminescent Properties
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DOI：
10.3390/cryst12081096
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发表时间：
2022-08
期刊：
影响因子：
2.7
通讯作者：
Ihsan Ullah;J. Shin;Ryuya Tokunaga;S. Hayami;H. Shin;K. Min
中科院分区：
文献类型：
--
作者：
Ihsan Ullah;J. Shin;Ryuya Tokunaga;S. Hayami;H. Shin;K. Min
通过Cu（CH3COO）2·H2O/Cu（NO3）2·3H2O与双（4-吡啶基）苄胺（bpba）反应，合成了一维配位聚合物[Cu 2（bpba）（CH3COO）4]（1）和二维配位聚合物[Cu（bpba）2（H2O）（NO3）]（NO3）·2H2O·MeOH（2）.铜（II）离子1和2具有扭曲的正方形金字塔协调桨轮结构和八面体的几何形状，分别。1和2分别与Cu（II）离子和bpba配体配位形成锯齿状一维和褶皱状二维配位聚合物。聚合物1在355和466 nm处表现出强发射，而聚合物2仅在464 nm处表现出强发射。的排放量是强烈依赖于由bpba和阴离子配体连接的Cu（II）离子的几何形状。聚合物1在桨轮二聚体中表现出非常强的反铁磁相互作用，而聚合物2通过bpba连接体和/或空间表现出非常弱的反铁磁相互作用。
A one-dimensional (1D) coordination polymer [Cu2(bpba)(CH3COO)4] (1) and a two-dimensional (2D) coordination polymer [Cu(bpba)2(H2O)(NO3)](NO3)∙2H2O∙MeOH (2) were synthesized by the reaction between Cu(CH3COO)2∙H2O/Cu(NO3)2∙3H2O and bis(4-pyridyl)benzylamine (bpba). The Cu(II) ions of 1 and 2 have distorted-square pyramidal coordination with a paddle-wheel structure and an octahedral geometry, respectively. By coordinating the Cu(II) ions and bpba ligands, 1 and 2 formed zigzag 1D and puckered 2D coordination polymers, respectively. Polymer 1 exhibits strong emissions at 355 and 466 nm, whereas polymer 2 exhibits strong emissions only at 464 nm. The emissions are strongly dependent on the geometry of the Cu(II) ions linked by the bpba and anionic ligands. Polymer 1 exhibits a very strong antiferromagnetic interaction within the paddle-wheel dimer, whereas polymer 2 exhibits a very weak antiferromagnetic interaction through the bpba linkers and/or space.