Journal ArticleDOI
Chromium(III) and Calcium(II) complexes obtained from dipicolinic acid: Synthesis, characterization, X-Ray crystal structure and solution studies
Z. Aghajani,Hossein Aghabozorg,E. Sadr-khanlou,Ardeshir Shokrollahi,S. Derki,Mojtaba Shamsipur +5 more
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TLDR
In this paper, the Cr(III) and Ca(II) complexes were synthesized by reaction of 2,9-dimethyl-1,10-phenanthroline (dmp) and pyridine-2,6-dicarboxylic acid (pydcH2), respectively, and characterized using IR spectroscopy, single crystal X-ray diffraction method and solution studies.Abstract:
The Cr(III) and Ca(II) complexes (dmpH)[Cr(pydc)2]•H2O (1) and [Ca2(pydc)2(H2O)6].2pydcH2 (2) were synthesized by reaction of 2,9-dimethyl-1,10-phenanthroline (dmp) and pyridine-2,6-dicarboxylic acid (pydcH2) with Cr(NO3)3 and Ca(NO3)2, respectively, and characterized using IR spectroscopy, single crystal X-ray diffraction method and solution studies. The space group and crystal system of these two compounds are P2
1/c and monoclinic. The crystal dimensions are a = 9.785(3) A, b = 25.671(4) A, c = 9.3402(16) A, β = 90.790(17)° for (1) and a = 9.1319(4) A, b = 14.8430(8) A, c = 12.2449(7) A, β = 98.227(5)° for (2). In complex (1), a water molecule presents in the crystal packing, linking the anionic and cationic fragments together by hydrogen bonding and thus increases the stabilization of crystal lattices. In complex (2), the coordinated water molecules relate each dimer to adjacent dimers forming infinite molecular ribbons by strong hydrogen bondings. Hydrogen bonding and ion pairing play an important role in stabilizing these crystals. The complexation reactions of pydc, dmp and pydc+dmp with Cr3+ and Ca2+ ions in aqueous solution were investigated by potentiometric pH titrations and the equilibrium constants for all major complexes formed were evaluated.read more
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Journal ArticleDOI
Crystal engineering with coordination compounds of NiII, CoII, and CrIII bearing dipicolinic acid driven by the nature of the noncovalent interactions
Masoud Mirzaei,Hossein Eshtiagh-Hosseini,Zahra Karrabi,Krešimir Molčanov,Ehsan Eydizadeh,Joel T. Mague,Antonio Bauzá,Antonio Frontera +7 more
Abstract: Five new proton transfer compounds, (Hapy)[Cr(pydc)2]·5H2O·[pydcH2] (1), (Hacr)[Cr(pydc)2]·2H2O (2), (H9a-acr)[Cr(pydc)2]·4.27H2O (3), [Co(pydc)(pydcH2)]·3H2O (4) and [Ni(pydcH)2]·H3O·2H2O (5) (where pydcH2 = pyridine-2,6-dicarboxylic acid; apy = 2-aminopyridine; acr = acridine and 9a-acr = 9-aminoacridine) have been synthesized and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction techniques. Crystallographic analysis revealed that compounds 1–5 have distorted octahedral geometries with pydc2− and pydcH− ions or pydcH2 coordinated as tridentate ligands to each metal ion through one oxygen atom of each carboxylate group and the nitrogen atom of the pyridine ring. Compounds 1–3 consist of cationic complexes where the dipicolinic acid is coordinated to the metal ion in the dianionic form, whereas 4 and 5 are neutral complexes. In 4, the acid is coordinated to the metal ion in the neutral form, which is quite rare. In the crystal structures of the different complexes, extensive O–H⋯O, N–H⋯O and C–H⋯O hydrogen bonds, as well as other noncovalent interactions involving aromatic rings (C–H⋯π, C–O⋯π and π⋯π stacking), were described and analysed by means of density functional theory (DFT) calculations since they play an important role in the construction of three-dimensional supramolecular frameworks.
Journal ArticleDOI
A brief review of structural concepts of novel supramolecular proton transfer compounds and their metal complexes (part II)
Hossein Aghabozorg,Hossein Aghabozorg,F Manteghi,F Manteghi,Shabnam Sheshmani,Shabnam Sheshmani +5 more
TL;DR: A brief review of structural concepts of novel supramolecular proton transfer compounds and their metal complexes by Aghabozorg et al. as mentioned in this paper is a good starting point for this paper.
Journal ArticleDOI
Removal of Bromocresol Green from Aqueous Solution via Adsorption on Ziziphus nummularia as a New, Natural, and Low-Cost Adsorbent: Kinetic and Thermodynamic Study of Removal Process
TL;DR: In this article, Ziziphus nummularia (ZPN) was used for the removal of Bromocresol Green (BCG) from several water solutions successfully, and several kinetic models were tested including Lagergren, pseudosecond-order, particle diffusion, film diffusion, and Elovich models.
Journal ArticleDOI
Cobalt (II), zirconium(IV), calcium(II) complexes with dipicolinic acid and imidazole derivatives: X-ray studies, thermal analyses, evaluation as in vitro antibacterial and cytotoxic agents
Sara Abdolmaleki,Mohammad Ghadermazi,Morahem Ashengroph,Andisheh Saffari,Salime Moradi Sabzkohi +4 more
TL;DR: In this paper, four coordination complexes, [2-mimH]2[Co(pydc)2][ClO4], H2O (1), [2]-2-6-dicarboxylic acid (PydcH2) with 2-methylimidazole (2mim) and imidazoles (imi) in 1:2M ratio and metal salts have been characterized by spectroscopic methods and single crystal X-ray diffraction technique.
Journal ArticleDOI
Structural variation within uraniumVI heterocyclic carboxylates: Solid and solution states studies
Masoud Mirzaei,Hossein Eshtiagh-Hosseini,Vito Lippolis,Hossein Aghabozorg,D. Kordestani,A. Shokrollahi,R. Aghaei,Alexander J. Blake +7 more
TL;DR: In this paper, the stability properties of two new uraniumVI metal-organic compounds, (tataH)2[(UO2)2(pdtc) 2(μ-OH)2]·2H2O (1) and (AcrH 2[(PydcH2)(pydc)2 [(Pyridine-2,6-bis(monothiocarboxylate) 2] (2)] (3), were obtained via proton transfer methodology by reacting UO22+ with the preformed
References
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MonographDOI
Supramolecular Chemistry: Concepts and Perspectives
TL;DR: From molecular to supramolescular chemistry: concepts and language of supramolecular chemistry, molecular recognition, information, complementarity molecular receptors - design principles and more.
Book
Determination and Use of Stability Constants
TL;DR: In this article, the authors present a complete metal complex data base with linear stability constants and species concentrations of complex systems, including a mixed-ligand binuclear dioxygen system nonaqueous solvents complex multicomponent systems equilibrium with solid phases equilibrium involving hydrolytic species species distributions of hydroxo and fluoro complexes of AI(III).
Journal ArticleDOI
Selective and sensitive spectrophotometric method for determination of sub-micro-molar amounts of aluminium ion.
TL;DR: The eriochrome cyanine R in the presence of N,N-dodecyltrimethylammonium bromide as cationic surfactant spectrophotometric determination of Al3+ ion has been carried out and has been successfully applied for Al3- ion determination in real sample.
Journal ArticleDOI
Synthesis, characterization, crystal structures, and solution studies of Ni(II), Cu(II) and Zn(II) complexes obtained from pyridine-2,6-dicarboxylic acid and 2,9-Dimethyl-1,10-Phenanthroline
TL;DR: In this paper, the homonuclear water-soluble and air stable compounds (dmpH) (H5O2) au][M(pydc)2].0.5H2O (M = Ni(II) (1), Cu(II), Zn(II)) (3); pydcH2 = pyridine-2,6-dicarboxylic acid, dipicolinic acid, dmp = 2,9-dimethyl-1,10-phenanthroline) have been prepared by self
Journal ArticleDOI
Piperazinediium bis(pyridine-2,6-dicarboxylato)nickelate(II) tetrahydrate
Hossein Aghabozorg,Jafar Attar Gharamaleki,Pouya Ghasemikhah,Mohammad Ghadermazi,Janet Soleimannejad +4 more
TL;DR: The reaction of nickel(II) nitrate hexa-hydrate with the proton-transfer compound piperazinediium pyridine-2,6-dicarboxyl-ate, or (pipzH2)(pydc) (in which pipz is piperazine and pydcH2 is polycyclic acid), in aqueous solution leads to the formation of the title compound, (pippzH 2 ).