Preparation, structural characterization and luminescence studies of mono- and binuclear Zn(II) and Cd(II) acetates with pyridine-4-aldoxime and pyridine-4-amidoxime ligands

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• 作者：Eduard B. Coropceanu^a ; Lilia Croitor^b ; ^{croitor.lilia@gmail.com" class="auth_mail} ; Anatolii V. Siminel^b ; Marina S. Fonari^b
• 关键词：Zn(II) ; Cd(II) ; Pyridine-4-aldoxime ; Pyridine-4-amidoxime ; Crystal structures
• 刊名：Polyhedron
• 出版年：17 June 2014
• 年：2014
• 卷：75
• 期：Complete
• 页码：73-80
• 全文大小：2321 K

文摘

Mono- and binuclear Zn(II)/Cd(II) pyridine-4-aldoxime and pyridine-4-amidoxime complexes, [Zn(CH₃COO)₂(4-pyao)₂] (1), [Zn(CH₃COO)₂(4-pyamo)₂] (2), [Cd₂(CH₃COO)₄(4-pyao)₄]·4H₂O (3), [Cd₂(CH₃COO)₄(4-pyamo)₄]·2DMF (4) and [Cd(CH₃COO)₂(4-pyao)₃]·3H₂O (5) (4-pyao = pyridine-4-aldoxime; 4-pyamo = pyridine-4-amidoxime), were synthesized and characterized by elemental analysis, IR spectroscopy and X-ray structure determination. The mononuclear compounds 1 and 2 contain two, while compound 5 contains three neutral pyridine-4-aldoxime ligands coordinated to the metal center through the N_pyridyl atom. The acetate anions coordinate in monodentate (1, 2), bidentate (3–5) and bidentate-bridging (3, 4) modes. Compounds 2, 3 and 5 display blue luminescence upon excitation with ultraviolet light.