论文标题
带有锰（III）-Copper（II）异量金属环基序的12米alactrown-4复合物的慢磁松弛
Slow Magnetic Relaxation of a 12-Metallacrown-4 Complex with a Manganese(III)-Copper(II) Heterometallic Ring Motif
论文作者
论文摘要
异金属金属（MC），（TMA）$ _ 2 $ {Mn（OAC）$ _ 2 $ [12-MC $ _ {Mn（iii）Cu（iii）Cu（ii）n（ii）n（shi）} $ -4]（ch $ _3 $ oh）} $^ - $ OAC是乙酸盐，Shi $^{3 - } $是水杨氢氧，由Mn $^{II} $ ION组成，在中央腔中捕获，并在中央腔中捕获，交替进行明确的和有序的锰（III）（III）和铜（II）copper（ii）MC Ring，of Mc Ring of The Mc Mc结构MC结构设计。 DC-MAGNETERMOTIRETRY表征和随后的Spin Hamiltonian $$ H = -j_1（\ Mathbf {s} _1+\ Mathbf {s} _3）\ CDOT \ CDOT \ MATHBF {S} _5-J_2（\ Mathbf {S} _2 _2+\ Mathbf {s} _4）\ cdot \ mathbf {s} _5-j_3 \ sum_ {i = 1}^{4} \ Mathbf {s} _i \ cdot \ cdot \ cdot \ mathbf {s} _ {i+1} + d(s_{z,1}^2 + s_{z,3}^2) + μ_B\sum_{j=1}^5 g_j\mathbf{s}_j\cdot\mathbf{B}$$ indicates an S = 5/2 ground state and a sizable axial zero-field splitting on Mn$^{III}$. AC敏感性测量结果表明，类似于单分子磁铁（SMM）行为，1显示了缓慢的磁化松弛。
The heterobimetallic metallacrown (MC), (TMA)$_2${Mn(OAc)$_2$[12-MC$_{Mn(III)Cu(II)N(shi)}$-4](CH$_3$OH)}$\cdot$2.90CH$_3$OH, 1, where TMA$^+$ is tetramethylammonium, $^-$OAc is acetate, and shi$^{3-}$ is salicylhydroximate, consists of a Mn$^{II}$ ion captured in the central cavity and alternating unambiguous and ordered manganese(III) and copper(II) sites about the MC ring, a first for the archetypal MC structure design. DC-magnetometry characterization and subsequent simulation with the Spin Hamiltonian $$H = -J_1(\mathbf{s}_1+\mathbf{s}_3)\cdot\mathbf{s}_5-J_2(\mathbf{s}_2+\mathbf{s}_4)\cdot\mathbf{s}_5-J_3\sum_{i=1}^{4}\mathbf{s}_i\cdot\mathbf{s}_{i+1} + d(s_{z,1}^2 + s_{z,3}^2) + μ_B\sum_{j=1}^5 g_j\mathbf{s}_j\cdot\mathbf{B}$$ indicates an S = 5/2 ground state and a sizable axial zero-field splitting on Mn$^{III}$. AC-susceptibility measurements reveal that 1 displays slow magnetization relaxation akin to single-molecule magnet (SMM) behavior.
