Crystallisation of H3BTC, H3TPO or H2SDA with MII (M = Co, Mn or Zn) and 2,2′-bipyridyl: design and control of co-ordination architecture, and magnetic properties (H3BTC = benzene-1,3,5-tricarboxylic acid, H3TPO = tris(4-carboxylphenyl)phosphine oxide, H2SDA = cis-stilbene-4,4′-dicarboxylic acid) †
作者:M. John Plater、Mark R. St. J. Foreman、Eugenio Coronado、Carlos J. Gómez-García、Alexandra M. Z. Slawin
DOI:10.1039/a905332h
日期:——
The hydrothermal reaction of benzene-1,3,5-tricarboxylic acid (H3BTC) with MII (M = Mn, Co or Zn), tris(4-carboxyphenyl)phosphine oxide (H3TPO) or cis-stilbene-4,4â²-dicarboxylic acid (H2SDA) with CoII and 2,2â²-bipyridyl (BIPY) gave 1-D co-ordination networks formulated as: [M(HBTC)(BIPY)(H2O)] (M = Mn 1, Co 2, or Zn 3; [Co3(BTC)2(BIPY)2(H2O)6]·4H2O 4, [Co3(TPO)2(BIPY)2(H2O)6]·xH2O 5 and [Co(SDA)(BIPY)(H2O)] 6. Structures 1 and 2 consist of double stranded chains of alternating HBTC dianions and dimeric units MIIâMII linked by two µ-(1,1) bridging carboxylates. Magnetic properties of 1 and 2 indicate the presence of ferromagnetic exchange interactions within the dimers. Structures 4 and 5 consist of chains with a molecular ladder motif which are stacked creating large channels lined by hydrated cobalt(II) ions. The H2O/D2O solvent exchange in structure 5, studied by infrared spectroscopy and thermal gravimetric analysisâmass spectrometry, provides evidence for the porosity and zeolitic nature of the material.
苯-1,3,5-三甲酸 (H3BTC) 与 MII(M=Mn、Co 或 Zn)、三(4-羧基苯基)氧化膦 (H3TPO) 或顺式二苯乙烯-4,4-的水热反应2-二羧酸 (H2SDA) 与 CoII 和 2,2-联吡啶 (BIPY) 产生一维配位网络,公式为:[M(HBTC)(BIPY)(H2O)] (M = Mn 1, Co 2 或 Zn 3;[Co3(BTC)2(BIPY)2(H2O)6]·4H2O 4、[Co3(TPO)2(BIPY)2(H2O)6]·xH2O 5 和 [Co( SDA)(BIPY)(H2O)] 6. 结构1和2由交替的HBTC二价阴离子和二聚体单元MII–MII的双链组成,通过两个μ-(1,1)桥连羧酸酯连接1和2的磁性。表明二聚体中存在铁磁性交换相互作用,结构 4 和 5 由具有分子梯基序的链组成,这些链堆叠在一起形成由水合钴 (II) 离子排列的大通道。红外光谱和热重分析-质谱分析为材料的孔隙率和沸石性质提供了证据。