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Zeitschrift für Kristallographie - Crystalline Materials

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Volume 227, Issue 10 (Oct 2012)


Synthesis and characterization of tetrapyridophenazine ligand and its novel 1-D metal-organic wave-like coordination polymer of Ni(II) ion

Alireza Abbasi / Shokoofeh Geranmayeh
  • University of Tehran, College of Science, Tehran, Iran
/ Vala Saniee
  • University of Tehran, College of Science, Tehran, Iran
/ Nafise Modanlou Juibari
  • University of Tehran, College of Science, Tehran, Iran
/ Alireza Badiei
  • University of Tehran, College of Science, Tehran, Iran
Published Online: 2012-06-18 | DOI: https://doi.org/10.1524/zkri.2012.1518


A protonated tpphz ligand, H2tpphz · 2 H2O · 2 Cl, 1, and novel 1-D coordination polymer of the type [Ni22-tpphz)(μ2-tp)(H2O)6]n · (tp) · 3.65(H2O), 2 (where tpphz = tetrapyrido[3,2-a:2′,3′-c:3′′,2′′-h:2′′′,3′′′-j]phenazine, and H2tp = terephthalic acid) have been synthesized and characterized by single crystal X-ray diffraction analysis. The asymmetric units in both structures consist of half of their formula. In the crystal structure 1, different types of hydrogen bonds together with π—π stacking are dominant. In the structure of 2, Ni(II) ion is coordinated by two N atoms from tpphz, one oxygen atoms from terephthalic acid and three water oxygen atoms in a distorted meridional octahedral geometry. Each tp ligand bridges two Ni(II) centers through monodentate carboxylate group. In the overall structure of 2, the Ni(II) centers are connected by tp and tpphz ligands to create a 1-D wave-like chain with a period of 20.91 Å running parallel down [1, 2].

This article offers supplementary material which is provided at the end of the article.

Keywords: Tetrapyridophenazine (tpphz); Terephthalic acid; Coordination polymer; Crystal structure

About the article

* Correspondence address: University of Tehran, College of Science, School of Chemistry, Tehran, Iran

Published Online: 2012-06-18

Published in Print: 2012-10-01

Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1524/zkri.2012.1518. Export Citation

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