Search

The solvothermal reactions of NiCl2⋅6H2O, Ln(NO3)3⋅nH2O, 3,4‐dichlorobenzoic acid (3,4‐HDCB), and 2,2′‐bipyridine (2,2′‐bpy) yielded eight zero‐dimensional (0D) Ni(II)‐Ln(III) heterometallic complexes NdNi2(3,4‐DCB)7(2,2′‐bpy)2 (1) and Ln2Ni2(3,4‐DCB)10(2,2′‐bpy)2 [Ln=Sm (2), Eu (3), Gd (4), Tb (5), Dy (6), Er (7), and Yb (8)]. Complexes 1–8 display three types of linear heterometallic clusters. Complex 1 is a trinuclear cluster, whereas complexes 2–8 are tetranuclear clusters. Complexes 2–8 posssess the same formula, but the coordination number of Ln(III) in 2–6 is different from that in 7 and 8. In 1–8, the adjacent polynuclear clusters are linked by the π–π interactions into a one‐dimensional (1D) supramolecular chain. The size of Ln(III) ions and the position of halogen substituents have important effects on the formation and structures of 1–8. The properties of photoluminescence and magnetism of 1–8 were investigated. [ABSTRACT FROM AUTHOR]

A series of linear CoII 2 LnIII 2 clusters derived from 3,4-dichlorobenzoate and 2,2′-bipyridine have been successfully synthesized and structurally characterized. Their photoluminescent and magnetic properties have been investigated. • Seven CoII-LnIII heteromatellic complexes are obtained. • The corresponding EuIII and TbIII complexes exhibit characteristic photoluminescent properties. • The corresponding DyIII complex shows a field-induced slow magnetic relaxation behavior. The reactions of Co(NO 3) 2 ·6H 2 O, Ln(NO 3) 3 · n H 2 O, 3,4-dichlorobenzoic acid (3,4-HDCB), 2,2′-bipyridine (2,2′-bpy), and NaOH under solvothermal conditions of H 2 O and ethanol yielded a series of 3d-4f heterometallic complexes [Ln 2 Co 2 (3,4-DCB) 10 (2,2′-bpy) 2 ] [Ln = Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), Dy (6), and Er (7)]. Complexes 1 – 7 are isostructural except that the coordination number of LnIII in 1 – 6 is different from that in 7. This is related to the size of the LnIII ions. Complexes 1 – 7 possess linear tetranuclear CoII-LnIII-LnIII-CoII cluster structures formed by the 3,4-DCB anions bridging the CoII and LnIII ions. The thermal stability as well as the photoluminescent and magnetic properties of 1 – 7 were investigated. [ABSTRACT FROM AUTHOR]