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Organization of Mn-Clusters in pcu and bcu Networks: Synthesis, Structure, and Properties

机译:pcu和bcu网络中Mn簇的组织:合成,结构和性质

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Two new anionic inorganic?organic hybrid compounds [H_3O][Mn_3(μ_3-OH)(C_(14)H_8O_6S)_3(H_2O)](DMF)_5, I, and [H_3O]_2[Mn_7(μ_3-OH)_4(C_(14)H_8O_6S)_6(H_2O)_4](H_2O)_2(DMF)_8, II, have been prepared by employing mild solvothermal methods. Both the compounds have three-dimensionally extended structures formed by Mn_6 and Mn_7 clusters, respectively. The connectivity between Mn_6 and Mn_7 clusters and 4,4′-sulfonyldibenzoic acid anions (SDBA~(2?)) results in a six connected pcu network in I and an eight connected bcu network in II. The presence of hydronium ion (H_3O~+) along with the solvent molecules in the channels of both the compounds suggested proton conduction in the solids. Proton conductivity studies gave values of ~3 × 10~(?4) Ω~(?1) cm~(?1) 98% relative humidity in both the compounds. The high activation energies indicate a vehicle mechanism in the compounds I and II. Magnetic studies indicate antiferromagnetic behavior in both the compounds.
机译:两种新的阴离子无机有机杂化化合物[H_3O] [Mn_3(μ_3-OH)(C_(14)H_8O_6S)_3(H_2O)](DMF)_5,I和[H_3O] _2 [Mn_7(μ_3-OH)_4 (C_(14)H_8O_6S)_6(H_2O)_4](H_2O)_2(DMF)_8,II已通过采用温和的溶剂热法制备。两种化合物均具有分别由Mn_6和Mn_7簇形成的三维延伸结构。 Mn_6和Mn_7团簇与4,4'-磺酰基二苯甲酸阴离子(SDBA〜(2?))之间的连通性导致I中的六连接pcu网络和II中的八连接bcu网络。两种化合物的通道中都存在水合氢离子(H_3O〜+)和溶剂分子,这表明固体中存在质子传导。质子传导率研究得出两种化合物的相对湿度均为〜3×10〜(?4)Ω〜(?1)cm〜(?1)98%的值。高活化能表明化合物Ⅰ和Ⅱ中的载体机理。磁性研究表明两种化合物的反铁磁性行为。

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