Paul Geo, Choudhury Amitava, Nagarajan R, Rao C N R
Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India.
Inorg Chem. 2003 Mar 24;42(6):2004-13. doi: 10.1021/ic020645v.
Amine-templated vanadium sulfates of the formula [HN(CH(2))(6)NH][(V(IV)O)(2)(OH)(2)(SO(4))(2)].H(2)O, I, [H(3)N(CH(2))(2)NH(3)][V(III)(OH)(SO(4))(2)].H(2)O, II, and [H(2)N(CH(2))(4)NH(2)][(V(IV)O)(H(2)O)(SO(4))(2)], III, have been prepared under hydrothermal conditions. These vanadium sulfates add to the new emerging family of organically templated metal sulfates. Compound I has a linear chain structure consisting of V(2)O(8) square-pyramid dimers connected by corner-sharing SO(4) tetrahedra, creating four-membered rings along the chain. Both II and III possess simple linear chain topologies formed by VO(6) octahedra and SO(4) tetrahedra, with II having the tancoite chain structure. Compound I crystallizes in the triclinic space group P1 (No. 2) with a = 7.4852(4) A, b = 9.5373(5) A, c = 11.9177(6) A, alpha = 77.22 degrees, beta = 76.47(2) degrees, gamma = 80.86 degrees, Z = 2. Compound II: monoclinic, space group P2(1)/c (No. 14), a = 6.942(2) A, b = 10.317(3) A, c = 15.102(6) A, beta = 90.64(4) degrees, Z = 4. Compound III: triclinic, space group P1 (No. 2) with a = 6.2558(10) A, b = 7.0663(14) A, c = 15.592(4) A, alpha = 90.46(2) degrees, beta = 90.47(2) degrees, gamma = 115.68(2) degrees, Z = 2. Magnetic susceptibility measurements reveal weak antiferromagnetic interactions in I and III and ferromagnetic interactions in II.
已在水热条件下制备出化学式为[HN(CH(2))(6)NH][(V(IV)O)(2)(OH)(2)(SO(4))(2)].H(2)O（化合物I）、[H(3)N(CH(2))(2)NH(3)][V(III)(OH)(SO(4))(2)].H(2)O（化合物II）和[H(2)N(CH(2))(4)NH(2)][(V(IV)O)(H(2)O)(SO(4))(2)]（化合物III）的胺模板钒硫酸盐。这些钒硫酸盐加入到了新出现的有机模板金属硫酸盐家族中。化合物I具有线性链结构，由通过共角顶的SO(4)四面体连接的V(2)O(8)方锥二聚体组成，沿链形成四元环。化合物II和III都具有由VO(6)八面体和SO(4)四面体形成的简单线性链拓扑结构，化合物II具有碳碲锌矿链结构。化合物I在三斜空间群P1（编号2）中结晶，a = 7.4852(4) Å，b = 9.5373(5) Å，c = 11.9177(6) Å，α = 77.22°，β = 76.47(2)°，γ = 80.86°，Z = 2。化合物II：单斜，空间群P2(1)/c（编号14），a = 6.942(2) Å，b = 10.317(3) Å，c = 15.102(6) Å，β = 90.64(4)°，Z = 4。化合物III：三斜，空间群P1（编号2），a = 6.2558(10) Å，b = 7.0663(14) Å，c = 15.592(4) Å，α = 90.46(2)°，β = 90.47(2)°，γ = 115.68(2)°，Z = 2。磁化率测量结果表明，化合物I和III中存在弱反铁磁相互作用，化合物II中存在铁磁相互作用。
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