43193-60-8Relevant articles and documents
Self-assembly of alternating left- and right-handed infinite Cd(II) helicates into a 2D open framework structure
Ghosh, Sujit K.,Bharadwaj, Parimal K.
, p. 119 - 122 (2006)
Pyrazine-2,3,5,6-tetracarboxylic acid (ptcH4) reacts with Cd(NO3)2·6H2O at room temperature in the presence of pyridine to form a 2D open framework built from alternating left- and right-handed helicates with the empirical formula, {[Cd2(ptc)·(py)5·H2O]·5H2O·py}n, 1. Lattice water and pyridine molecules form an intricate array of H-bonding with the 2D sheets leading to a 3D structure. This compound crystallizes in the monoclinic space group C2/c with the following lattice parameters-a=24.103(2), b=13.480(5), c=29.176(4) A?, β=109.427(3)°, V=8940(4) A?3, Z=8, R1=0.0513, wR2=0.1552, S=1.085.
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Hollstein,Marshall
, p. 3510 (1972)
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Podoji,Gerber
, p. 4616 (1970)
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Facile construction of two-dimensional coordination polymers with a well-designed redox-active organic linker for improved lithium ion battery performance
Liu, Jingwei,Zhang, Lin,Li, Huanhuan,Zhao, Peng,Ren, Peng,Shi, Wei,Cheng, Peng
, p. 602 - 608 (2019)
A well-designed redox-active organic linker, pyrazine-2,3,5,6-tetracarboxylate (H4pztc) with brimming active sites for lithium ions storage was utilized to construct coordination polymers (CPs) via a facile hydrothermal reaction. Those two isostructural two-dimensional (2D) CPs, namely [M2(pztc)(H2O)6]n (M=Co for 1 and Ni for 2), delivered excellent reversible capacities and stable cycling performance as anodes in lithium ion batteries. As demonstrated in electrochemical studies, 1 and 2 can achieve highly reversible capacities of 815 and 536 mA h g?1 at 200 mA g?1 for 150 cycles, respectively, best performed for the reported 2D-CP-based anode materials. The electrochemical mechanism studies showed that the remarkable performances can be ascribed to the synergistic Li-storage redox reactions of metal centers and organic moieties. Our work highlights the opportunities of using a well-designed organic ligand to construct low-dimensional CPs as new type of electrode materials for advanced lithium ion batteries.
1D slide-fastener-like coordination polymers of Mn(II) derived from pyrazine-2,3,5,6-tetracarboxylic acid
Gao, Hong-Ling,Zhang, Yan-Ping,Yang, Ai-Hong,Fang, Su-Rong,Cui, Jian-Zhong
experimental part, p. 97 - 100 (2009/05/08)
Two new 1D slide-fastener-like coordination polymers {[Mn2(pztc)(phen)2(H2O)2]·4H2O}n (1) and {[Mn2(pztc)(bpy)2(H2O)2]·2H2O}n (2) have been synthesized by the reactions of pyrazine-2,3,5,6-tetracarboxylic acid (pztcH4) and Mn(OAc)2·4H2O in the presence of 1,10-phenanthroline (phen) or 2,2′-bipyridine (bpy) under hydrothermal conditions and characterized by elemental analyses, FT-IR, TGA and X-ray diffraction. In complex 1 and 2, metal ions are bridged by pyrazine-2,3,5,6-tetracarboxylate, coordinating in a hexadentate manner, so forming 1D polymeric chains. The remaining coordination sites of the metal ions are occupied by one O atom of water molecule and two N atoms of the terminal ligand (phen or bpy). IR spectra and thermal analysis data are in agreement with the crystal structure.