Abstract:
Four new Ni16 molecular wheels with the general formula [L4Ni16(RCOO)16(H2O)x(MeOH)12-x] (where H4L = 1,4-bis((E)-((2\'-hydroxybenzyl)imino)methyl)-2,3-naphthalenediol, and R = H or Me) have been isolated and structurally characterised. Complexes C1 - C3 (R = Me)were formed using nickel(II) acetate and presented as polymorphs with the same formulation of charged components. The same wheel-like architecture was observed in C4 (R = H), which was prepared using nickel(II) formate, demonstrating the potential for further versatility of the system. In contrast to similar four-fold symmetric Ni(II) wheel clusters, measurements of the static magnetic properties of C1 indicated the presence of dominant antiferromagnetic interactions and an S = 0 ground state.
摘要:
四个新的Ni16分子轮,其通式为[L4Ni16(RCOO)16(H2O)x(MeOH)12-x](其中H4L=1,4-双((E)-((2'-羟基苄基)亚氨基)甲基)-2,3-萘二醇,和R=H或Me)已被分离和结构表征。使用乙酸镍(II)形成络合物C1-C3(R=Me),并且呈现为具有相同的带电组分配方的多晶型物。在C4(R=H)中观察到相同的轮状结构,使用甲酸镍(II)制备,展示了该系统进一步多功能性的潜力。与类似的四重对称Ni(II)轮团相反,对C1的静态磁性的测量表明存在主要的反铁磁相互作用和S=0的基态。