A new Ho(III) cluster-based 3D coordination polymer with the formula {Ho₂(H₂O)₂(DMF)₂(ATPA)₃}_n (H₂ATPA = 2-Aminoterephthalic acid, DMF = N,N-dimethylformamide), 1, has been successfully synthesized via the hydrothermal method and characterized by elemental analysis, FT-IR, UV, single crystal and powder X-ray diffraction and photoluminescence measurements. Each Holmium atom has a distorted bicapped trigonal prismatic geometry with coordination of eight oxygen atoms. The shifting of the absorption band in the UV–Visible spectrum of 1 indicates the Ho atoms involved in coordination with H₂ATPA ligand. Ho(III)-based characteristic narrow strong emission bands due to the f–f transitions of Ho(III) cation have been detected for 1 in the visible region. The emission bands observed at 442 nm and 464 nm are the most severe, so the investigated complex emits the bright-blue light. One can conclude that the energy transfers from the H₂ATPA ligand to Ho(III) have been done effectively so that 1 would have the potential applications in the optical amplification field.

中文翻译：

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基于Ho 3+-团簇的3D配位聚合物：{Ho 2（H 2 O）2（DMF）2（ATPA）3} n的合成，结构和光致发光分析

一个新的何（III）与式基于集群的三维配位聚合物{何₂（H ₂ O）₂（DMF）₂（ATPA）₃ } _Ñ（H ₂ ATPA = 2-氨基对苯二甲酸，DMF =  Ñ，ñ -二甲基甲酰胺1，已通过水热法成功合成，并通过元素分析，FT-IR，UV，单晶和粉末X射线衍射以及光致发光测量进行了表征。每个Hol原子都具有扭曲的，二配位的八边形三棱柱形几何结构，具有八个氧原子的配位。紫外-可见光谱1中吸收带的移动表示与H ₂ ATPA配体配位的Ho原子。基于Ho（III）的特征性宽窄强发射带，这是由于Ho（III）阳离子的f–f跃迁引起的，在可见区域中已检测到1个。在442 nm和464 nm处观察到的发射带最为严重，因此研究的复合物发出了明亮的蓝光。可以得出结论，已经有效地完成了从H ₂ ATPA配体到Ho（III）的能量转移，因此1在光放大领域具有潜在的应用。