Syntheses, Structures, Photochemical and Magnetic Properties of Novel Divalent Cd/Mn Coordination Polymers Based on a Semirigid Tripodal Carboxylate Ligand

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• 作者：Jiehu Cui ; Qingxiang Yang ; Yizhi Li ; Zijian Guo ; Hegen Zheng
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：April 3, 2013
• 年：2013
• 卷：13
• 期：4
• 页码：1694-1702
• 全文大小：714K
• 年卷期：v.13,no.4(April 3, 2013)
• ISSN：1528-7505

文摘

The reactions of a semirigid tripodal carboxylic ligand, 3,5-bi(4-carboxy-phenoxy)-benzoic acid (H₃BCPBA) with Cd(NO₃)₂/Mn(NO₃)₂ afford five novel complexes, {[Cd₃(BCPBA)₂路(DMA)₂路(H₂O)₅]路7H₂O路2DMA}_n (1), {[Cd₃(BCPBA)₂(L¹)(H₂O)₆]路(L¹)}_n (L¹ = 4-[(E)-4-pyridinylazo]pyridine) (2), {[Cd₃(BCPBA)₂(L²)路(H₂O)₃(DMF)₂]路2DMF}_n (L² = 1,3-bis(4-pyridyl)propane) (3), {[Mn₃(BCPBA)₂(H₂O)₄]路11H₂O}_n (4), {[Mn₃(BCPBA)₂(DMF)₂(H₂O)₂]路2DMF路9H₂O}_n (5) in the presence or absence of an auxiliary ligand. Compound 1 is a three-dimensional (3D) structure with 3,4-connected net structure. Compound 2 possesses 3D networks with two 3D 鈫?3D interpenetration frameworks. Compound 3 is a 3D sheet structure with a decorated tfz-d topology. Compound 4 is a 3D structure which consists of a two-dimensional (2D) Mn honeycomb net with six infinite Mn rings and BCPBA^{3鈥?/sup> ligands. Compound 5 is also a 3D structure, while its 2D Mn honeycomb net with eight infinite Mn rings is different from that of compound 4. The photochemical property of 1鈥?b>3 is performed in the solid state at room temperature. Magnetic susceptibility measurements indicate that compounds 4 and 5 exhibit antiferromagnetic coupling between adjacent Mn(II) ions.}