pH Dependent Synthesis of Nd^III Coordination Compounds Based on Bifunctional 5-(4-Pyridyl)tetrazole-2-acetic Acid

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• 作者：Meng Jie Cao ; Yue Kang Li ; Peng Peng Sun ; Chen Yi Zhang ; Jue Wang ; Qiao Yun Li and Gao Wen Yang
• 刊名：Zeitschrift f蹲 anorganische und allgemeine Chemie
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：642
• 期：21
• 页码：1218-1221
• 全文大小：825K
• ISSN：1521-3749

文摘

The Nd^III coordination compounds [Nd(4-pytza)₃(H₂O)₂]·2H₂O (1) and [Nd(4-pytza)₂(H₂O)₄]Cl·2H₂O (2) [H4-pytza = 5-(4-pyridyl)tetrazole-2-acetic acid] were synthesized by reactions of K4-pytza and NdCl₃·6H₂O at different pH values. Single crystal X-ray diffraction analysis reveals that 4-pytza ligands in 1 in a μ_1,3-COO syn-syn or μ_1,1,3-COO bridging mode coordinate to two central Nd^III atoms to display a dinuclear unit, which is connected by one of these 4-pytza ligands acting in end-to-end bridging mode to form a 1D ladder-like chain. Different from 1, each 4-pytza in 2 with a μ_1,3-COO syn-anti bridging mode coordinates to two Nd^III atoms to display a 1D zigzag chain. Furthermore, the luminescence properties of 1 and 2 were investigated at room temperature in the solid state.