![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
Twelve oxamide-bridged Ln(III)–Cu(II) heteropentanuclear complexes Ln[Cu(PMoxd)]4(ClO4)3 · 5H2O (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and PMoxd = the N,N′-Bi(α-pyridylmethyl)-oxamide dianion) and 12 oxamide-bridged Ln(III)–Cu(II) heteropentanuclear complexes with the formula of Ln[Cu(PEoxd)]4(ClO4)3 · 5H2O (PEoxd = the N,N′-Bi(α-pyridylethyl)-oxamide dianion) were synthesized and characterized. The magnetic properties of Gd[Cu(PMoxd)]4(ClO4)3 · 5H2O (7) and Gd[Cu(PEoxd)]4(ClO4)3 · 2H2O (19) show that there are ferromagnetic interactions between Gd(III) and Cu(II) in the complexes with J Cu–Gd = 1.38 cm−1 and J Cu–Gd = 1.00 cm−1, respectively. Fluorescent quenching phenomena for Eu[Cu(PMoxd)]4(ClO4)3 · 5H2O (6) and Tb[Cu(PMoxd)]4(ClO4)3 · 5H2O (8) were also observed.
Acknowledgements
The work is supported by the National Natural Science Foundation of China (No. 20631030, 20601014) and National Basic Research Program of China (973 Program, 2007CB815305).
