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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 α = 9.953(3),b = 15.966(3),c = 16.081(5) A,V= 2555.5(13) A3,Z = 4,μ = 0.122mm-1,Dc= 1.514 Mg/m3,T= 296(2) K,C26H22N4O12,M,= 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) A) between two neighboring[H2pztc]anions was observed.
8-Hydroxyquinoline salt of pyrazine-2,3,5,6-tetracarboxylic acid [HQ] 2 [H2pztc] · 2H2O 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 α = 9.953 (3), b = 15.966 (3), c = 16.081 A, V = 2555.5 A3, Z = 4, 0.122mm-1, Dc = 1.514 Mg / m3, T = 296 (2) K, C26H22N4O12, M, = 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 OH ... O hydrogen bond (O ... O 2.470 (2) A) between two neighboring [H2pztc] anions was observed.