the spin Hamiltonian [Formula: see text]. Hysteresis loops for 1 have been observed below 0.8 K, indicative of a single-molecule magnet with a blocking temperature (TB) of 0.8 K. Molecular wheels 2-5 exhibit frequency dependence of alternating-current magnetic susceptibility under zero direct-current magnetic field, signifying the slow magnetization relaxation similar to that of 1. Significantly, an
salen(2-)型(N,N'-亚乙基双(
水杨酰
氨基))的
锰(III)Schiff碱与X-取代的(X = CH(3),Cl)
吡啶甲酰胺双
氰基
铁氧体(III)的反应[Fe( X-bpb)(CN)(2)](-)产生了一系列
氰化物桥接的Mn(6)Fe(6)分子轮,[Mn(III)(salen)](6)[Fe(III )(bpmb)(CN)(2)](6)x 7H(2)O(1),[Mn(salen)](6)[Fe(bpClb)(CN)(2)](6)x 4H (2)O x 2CH(3)OH(2),[Mn(salen)](6)[Fe(bpdmb)(CN)(2)](6)x 10H(2)O x 5CH(3)OH (3),[Mn(5-Br(salpn))](6)[Fe(bpmb)(CN)(2)](6)x 24H(2)O x 8CH(3)CN(4),和[Mn(5-Cl(salpn))](6)[Fe(bpmb)(CN)(2)](6)x