Anionic Host Layers Constructed with Guanidinium-Hydrogen Carbonate Dimer 2:1 Rosette-Ribbons and Bridging Carboxylate Connectors
Publication in refereed journal

香港中文大學研究人員

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摘要Four new inclusion compounds featuring an anionic layer-type host lattice constructed with guanidinium-bis(hydrogen carbonate) 2:1 rosette-ribbons that accommodate the same tetra-n-butylammonium guest species have been obtained and characterized by single-crystal X-ray analysis. In these crystal structures, an array of rosette-ribbons in parallel or nearly parallel alignment are cross-linked by selected carboxylate molecular connectors with effective bridging distances in the range 10.1-19.8 angstrom: 4,4'-biphenyldicarboxylate, with the longest separation between its colinear hydrogen-bonding acceptor sites in [(n-Bu)(4)N+](6)[C(NH2)(3+)](6)(HCO3-)(6)[4,4'-C12H8(COO-)(2)](3)center dot 6H(2)O (1); cyclohexane-1,4-dicarboxylate, with a nonplanar molecular skeleton in [(n-Bu)(4)N+](4)[C(NH2)(3)(+)](8)(HCO3-)(6)[1,4'-C6H10(COO-)(2)](3)center dot 8H(2)O (2); 4-cyanobenzoate, with a strong "Y type" hydrogen-bonding acceptor site at one end and a weak one at the other in [(n-Bu)(4)N+](2)[C(NH2)(3)(+)](2)(HCO3-)(2)[NCC6H4(COO-)](2)center dot 2H(2)O (3); and 1H-imidazole-4,5-dicarboxylate, functioning as a multiple hydrogen-bond acceptor in [(n-Bu)(4)N-3(+)[C(NH2)(3)(+)](4)(HCO3-)(4)[H+{C3N2H-(COO-)(COOH)}(2)) (4). The resulting planar anionic layer in 1 becomes an undulatory one in 3 and 4. In 2, adjacent wavy layers are supported by centrosymmetric cyclic (GM(+))2(H2O)(4) "double molecular pillars" to yield a three-dimensional anionic host network.
著者Han J, Yau CW, Chan CW, Mak TCW
期刊名稱Crystal Growth and Design
出版年份2012
月份9
日期1
卷號12
期次9
出版社American Chemical Society
頁次4457 - 4465
國際標準期刊號1528-7483
電子國際標準期刊號1528-7505
語言英式英語
Web of Science 學科類別Chemistry; Chemistry, Multidisciplinary; CHEMISTRY, MULTIDISCIPLINARY; Crystallography; CRYSTALLOGRAPHY; Materials Science; Materials Science, Multidisciplinary; MATERIALS SCIENCE, MULTIDISCIPLINARY

上次更新時間 2020-27-11 於 01:09