A four-spin ring with alternating magnetic interactions formed by pyridine-substituted nitronyl nitroxide radicals and Gd(III) ions: Crystal structure and magnetic properties

作者：Xu Jin Xia; Ma Yue; Xu Gong Feng; Wang Chao; Liao Dai Zheng^*; Jiang Zong Hui; Yan Shi Ping; Li Li Cun

来源：Inorganic Chemistry Communications, 2008, 11(11): 1356-1358.

DOI：10.1016/j.inoche.2008.09.006

• Gadolinium(III) complex
• Nitronyl nitroxide radical
• Crystal Structure
• Magnetic interaction

A novel complex, [Gd(hfac)(3)(NIT-5-Br-3py)](2) (hfac = hexafluoroacetylacetonat, NIT-5-Br-3py = 2-(4,4,5,5-tetramethyl-3-oxylimidazoline-1-oxide)-5-bromo-3-pyridine) has been synthesized and characterized structurally and magnetically. in which a NIT-5-Br-3py Molecular acts as a bridge ligand linking two Gd(III) ions through the oxygen atom of the N-O group and nitrogen atom from the pyridine ring to form a four-spin system. The fitting result Of the magnetic susceptibility shows two different magnetic interactions between Gd(III) ion and NIT-5-Br-3py in one complex: a weak ferromagnetic interaction (J(1) = +2.60 cm(-1)) through the N-O group. and a much weaker antiferromagnetic (J(2) = -0.24 cm (1)) interaction through pyridine ring.

• 出版日期2008-11
• 单位南开大学