Hexanuclear and Tetranuclear Mn/Ln clusters using 2-(hydroxy methyl)pyridine: Synthesis, structures and magnetic properties
Sun, Lei; Chen, Hui; Chen, C
| HERO ID | 4261052 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Hexanuclear and Tetranuclear Mn/Ln clusters using 2-(hydroxy methyl)pyridine: Synthesis, structures and magnetic properties |
| Authors | Sun, Lei; Chen, Hui; Chen, C |
| Journal | Applied Organometallic Chemistry |
| Volume | 31 |
| Issue | 12 |
| Abstract | Reactions of manganese benzoate dihydrate and lanthanide nitrate hexahydrate with 2-(hydroxymethyl)pyridine (hmpH) as ligand in the mixture solutions of acetonitrile and ethanol according to different molar ratios of NEt3 generated two kinds of Mn-Ln compounds[(Mn4La2III)-La-III(O)(2)(hmp)(7)(PhCO2)(2)(NO3)(5)] center dot 5H(2)O(1) and [(Mn2Gd2III)-Gd-III(hmp)(6)(PhCO2)(4)(NO3)(2)] center dot 3CH(3)CN center dot 3C(2)H(5)OH center dot 2H(2)O (2). By comparison of the two compounds, there exist considerable effects of reaction alkalinity on the structures and magnetic properties of products. Compound 1 possesses a core of [(Mn4La2III)-La-III(mu(4)-O)(mu(3)-O)(mu(3)-OR)(mu(2)-O)(7)](2-), which comprises three face-sharing defected cubane units. The core topology represents a new core type of Mn-Ln clusters. Compound 2 has a planar-butterfly structure. The solid-state dc magnetic susceptibility analyses indicate the antiferromagnetic interactions within compound 1 and ferromagnetic interactions within compound 2. Compound 1 has an S = 0 ground state, while compound 2 possesses an S = 11 ground state, fitting of the dc data for the tetranuclear Mn2Gd2 with the Magpack program gives parameters of J(Mn-Mn) = 3.11 cm(-1), J(Mn-Gd) = 0.02 cm(-1) and g = 1.96. |
| Doi | 10.1002/aoc.3846 |
| Wosid | WOS:000419195800030 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | magnetic property; Mn-ln compounds; SMMs |