Citation:
XU Feng, WEI Zhen-Hong, HUANG Xiang-Lei, MEI Ying-Xuan, CAI Hu. A Hydrogen Bond Stabilized 3D Network Built from Pyrazine-2,3,5,6-tetracarboxylic Acid and 8-Hydroxyquinoline[J]. Chinese Journal of Structural Chemistry,
;2015, 34(12): 1845-1850.
doi:
10.14102/j.cnki.0254-5861.2011-0775
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8-Hydroxyquinoline salt of pyrazine-2,3,5,6-tetracarboxylic acid [HQ]2[H2pztc]·2H2O (1) was prepared and characterized by single-crystal X-ray diffraction, NMR, IR, TGA, elemental analysis and fluorescent measurements. Compound 1 crystallizes in orthorhombic, space group Pbcn with a=9.953(3), b=15.966(3), c=16.081(5) Å, V=2555.5(13) Å3, Z=4, μ=0.122 mm-1, Dc=1.514 Mg/m3, T=296(2) K, C26H22N4O12, Mr=582.48, F(000)=1208, S=1.006, R=0.0448 and wR=0.1149. Compound 1 has a three-dimensional (3D) network, in which pyrazine-2,3,5,6-tetracarboxylic acids build up two-dimensional (2D) sheets and 8-hydroxyquinoline cations and water molecules act as pillars to connect the 2D sheets into an extended 3D network through strong intermolecular hydrogen bonding and π…π stacking interactions. Especially, a very short O-H…O hydrogen bond (O…O 2.470(2) Å) between two neighboring [H2pztc] anions was observed.
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