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Ahmed BM, Calco B, Mezei G. Tuning the structure and solubility of nanojars by peripheral ligand substitution, leading to unprecedented liquid-liquid extraction of the carbonate ion from water into aliphatic solvents. Dalton Trans 2016; 45:8327-39. [PMID: 27048621 DOI: 10.1039/c6dt00847j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Nanojars, a novel class of neutral anion-incarcerating agents of the general formula [Cu(II)(OH)(pz)]n (Cun; n = 27-31, pz = pyrazolate anion), efficiently sequester various oxoanions with large hydration energies from water. In this work, we explore whether substituents on the pyrazole ligand interfere with nanojar formation, and whether appropriate substituents could be employed to tune the solubility of nanojars in solvents of interest, such as long-chain aliphatic hydrocarbons (solvent of choice for large-scale liquid-liquid extraction processes) and water. To this end, we conducted a comprehensive study using 40 different pyrazole ligands, with one, two or three substituents in their 3-, 4- and 5-positions. The corresponding nanojars are characterized by single-crystal X-ray diffraction and/or electrospray-ionization mass spectrometry (ESI-MS). The results show that Cun-nanojars with various substituents in the pyrazole 4-position, including long chains, phenyl and CF3 groups, can be obtained. Straight chains are also tolerated at the pyrazole 3-position, and favor the Cu30-nanojar. Homoleptic nanojars, however, could not be obtained with phenyl or CF3 groups. Nevertheless, if used in mixture with the parent non-substituted pyrazole, sterically hindered pyrazoles do form heteroleptic nanojars. With 3,5-disubstituted pyrazoles, only heteroleptic nanojars are accessible. The crystal structure of novel nanojars (Bu4N)2[CO3⊂{Cu30(OH)30(3,5-Me2pz)y(pz)30-y}] (y = 14 and 15) is presented. We find that in contrast to the parent nanojar, which is insoluble in aliphatic solvents and water, nanojars with alkyl substituents are soluble in saturated hydrocarbon solvents, whereas nanojars based on novel pyrazoles, functionalized with oligoether chains, are readily soluble in water. Liquid-liquid extraction of carbonate from water under basic pH is presented for the first time.
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Affiliation(s)
- Basil M Ahmed
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan, USA.
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Mathivathanan L, Cruz R, Raptis RG. A [Cu3(μ3-O)]-pyrazolate metallacycle with terminal nitrate ligands exhibiting point group symmetry 3. Acta Crystallogr E Crystallogr Commun 2016; 72:492-4. [PMID: 27375872 PMCID: PMC4910335 DOI: 10.1107/s2056989016003741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 03/04/2016] [Indexed: 11/10/2022]
Abstract
The trinuclear triangular cuprate anion of the title compound, tris-[bis-(tri-phenyl-phospho-ranyl-idene)ammonium] tris-(μ2-4-chloro-pyrazolato-κ(2) N:N')-μ3-oxido-tris-[(nitrato-κ(2) O,O')cuprate(II)] nitrate monohydrate, (C36H30P2N)[Cu3(C3H2ClN2)3(NO3)3O]NO3·H2O, has point group symmetry 3., with the μ3-O atom located on the threefold rotation axis. The distorted square-pyramidal coordination sphere of the Cu(II) atom is completed by two N atoms of trans-bridging pyrazolate groups and a chelating nitrate anion. The complex anion is slightly bent, with the nitrate and pyrazolate groups occupying positions above and below the Cu3 plane, respectively. In the crystal, weak O-H⋯O and C-H⋯O hydrogen bonds, as well as π-π inter-actions, are present.
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Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
| | - Raquel Cruz
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
| | - Raphael G. Raptis
- Department of Chemistry, University of Puerto Rico – Rio Piedras, San Juan 00936, Puerto Rico, USA
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Machura B, Wolff M, Palion J, Benoist E. Synthesis, spectroscopic characterization and X-ray crystal structures of mononuclear and binuclear oxidorhenium(V) complexes containing indazolyl moieties. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Govor EV, Chakraborty I, Piñero DM, Baran P, Sanakis Y, Raptis RG. Structural and 57Fe-Mössbauer characterization of mononuclear ferrous and ferric pyrazole complexes. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.07.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Sameera WMC, Piñero DM, Herchel R, Sanakis Y, McGrady JE, Raptis RG, Zueva EM. A Combined Experimental and Computational Study of the Magnetic Superexchange within a Triangular (μ3-O)-Pyrazolato-FeIII3 Complex. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200206] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mathivathanan L. 3,5-Bis(2,4-dinitrophenyl)-4-nitro-1 H-pyrazole acetone monosolvate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o411. [PMID: 22347027 PMCID: PMC3275082 DOI: 10.1107/s1600536812001146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 01/10/2012] [Indexed: 11/24/2022]
Abstract
The title structure, C15H7N7O10·C3H6O, was prepared by pentanitration of 3,5-diphenyl-1H-pyrazole. The proton attached to a pyrazole N atom forms a hydrogen bond with the O atom of the acetone solvent molecule, owing to the NO2 enhanced acidity of the proton. The NO2 group on the phenyl C atom is twisted by 33.9 (2)° from coplanarity with the ring in order to avoid a short intramolecular O⋯O contact with an O atom of an adjacent pyrazole-bonded NO2 group.
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Xavier JR, Nanjundan S, Rajendran N. Electrochemical Adsorption Properties and Inhibition of Brass Corrosion in Natural Seawater by Thiadiazole Derivatives: Experimental and Theoretical Investigation. Ind Eng Chem Res 2011. [DOI: 10.1021/ie1016464] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - S. Nanjundan
- Department of Chemistry, Anna University, Chennai 600 025, India
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Miras HN, Zhao H, Herchel R, Rinaldi C, Pérez S, Raptis RG. Synthesis and Characterization of Linear Trinuclear Pd, Co, and Pd/Co Pyrazolate Complexes. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800349] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Rivera-Carrillo M, Chakraborty I, Mezei G, Webster RD, Raptis RG. Tuning of the [Cu3(μ-O)]4+/5+ Redox Couple: Spectroscopic Evidence of Charge Delocalization in the Mixed-Valent [Cu3(μ-O)]5+ Species. Inorg Chem 2008; 47:7644-50. [PMID: 18680363 DOI: 10.1021/ic800531y] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marlyn Rivera-Carrillo
- Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Indranil Chakraborty
- Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Gellert Mezei
- Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Richard D. Webster
- Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Raphael G. Raptis
- Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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Piñero D, Baran P, Boca R, Herchel R, Klein M, Raptis RG, Renz F, Sanakis Y. A pyrazolate-supported Fe(3)(mu(3)-O) core: structural, spectroscopic, electrochemical, and magnetic study. Inorg Chem 2007; 46:10981-9. [PMID: 18044951 PMCID: PMC2597296 DOI: 10.1021/ic0701460] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A comparison is made between the structural, spectroscopic, electrochemical, and magnetic properties of pyrazolate versus carboxylate complexes [Fe3(mu3(mu3O)(mu-LL)6Cl3]2- containing the Fe3(mu3-O)-motif. While the Fe3(mu3-O)-cores are structurally indistinguishable in the two types of complexes, their magnetic properties deviate from the expected values as a result of a through-pyrazole contribution to the overall antiferromagnetic exchange with J1/hc = -80.1 cm(-1) and J2/hc = -72.4 cm(-1), or J1/hc = 70.6 cm(-1) and J2/hc = -80.8 cm(-1), (Hex = -J1(S1S2 + S2S3) - J2S1S3). The magnetic properties of the pyrazolate complexes are further tuned by an antisymmetric exchange interaction term.
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Affiliation(s)
- Dalice Piñero
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Peter Baran
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Roman Boca
- Department of Inorganic Chemistry, Slovak University of Technology, SK-812 37 Bratislava, Slovakia
- Department of Inorganic Chemistry, Palacký University, Křížkovského 10, CZ-77147 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Chemistry, University of SS. Cyril and Methodius, Trnava, SK-91701, Slovakia
- Department of Inorganic Chemistry, Palacký University, Křížkovského 10, CZ-77147 Olomouc, Czech Republic
| | - Michael Klein
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University, D-55099 Mainz, Germany
| | - Raphael G. Raptis
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Franz Renz
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University, D-55099 Mainz, Germany
| | - Yiannis Sanakis
- Institute of Materials Science, NCRS “Demokritos”, 15310 Aghia Paraskevi, Athens, Greece
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Machura B, Jaworska M, Lodowski P. Natural bond orbital analysis and density functional study of linear and bent oxo-bridged dimers of rhenium(V). ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2005.06.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Babić-Samardzija K, Lupu C, Hackerman N, Barron AR, Luttge A. Inhibitive properties and surface morphology of a group of heterocyclic diazoles as inhibitors for acidic iron corrosion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:12187-96. [PMID: 16342991 DOI: 10.1021/la051766l] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The heterocyclic diazoles 3-amino-1H-isoindole, indazole, imidazole, 4-bromoimidazole, 4-methylimidazole, pyrazole, 4-nitropyrazole, and 4-sulfopyrazole were investigated as corrosion inhibitors of iron in 1 M HCl using ac and dc techniques. The polarization curves showed a decrease in corrosion current for the inhibitor-containing solution. Impedance spectra demonstrate that the charge-transfer resistance in the presence of these inhibitors was greater than in inhibitor-free solution, except for 4-nitropyrazole. The resistance increased with inhibitor concentration and with immersion time. The structural and electronic parameters of these diazoles were calculated using computational methodologies. The elemental composition and the speciation of the treated surfaces were investigated via XPS measurements, and morphological changes were monitored by vertical scanning interferometery.
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Affiliation(s)
- Ksenija Babić-Samardzija
- Department of Chemistry, Rice University, Houston, Texas 77005, and Department of Earth Science, Rice University, Houston, Texas 77005, USA
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Synthesis, spectroscopic characterization, crystal, molecular and electronic structure of the [{ReOBr2(pyz)2}2(μ-O)] and [{ReOBr2}2(μ-O)(μ-pyd)2] complexes. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.06.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Machura B, Dziȩgielewski J, Kruszynski R, Bartczak T, Kusz J. Linear and bent oxo-bridged dinuclear rhenium(V) complexes with terminal and bridging pyrazole ligands. Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2003.09.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Synthesis and spectroscopic investigation of the pyrazole complexes. The X-ray structure of [ReOBr 3 (OAsPh 3 )(pzH)]. INORG CHEM COMMUN 2003. [DOI: 10.1016/j.inoche.2003.08.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Machura B, Dziegielewski JO, Kruszynski R, Bartczak T. The synthesis, spectroscopic characterisation, crystal and molecular structure of two novel bent oxo-bridged dimers of rhenium(V) with μ-benzotriazolate ligands. Polyhedron 2003. [DOI: 10.1016/s0277-5387(03)00400-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Battistuzzi R, Saladini M. Structure of trans-diisothiocyanato(ethoxo)oxo-bis(triphenylphosphine)rhenium(V) complex. Inorganica Chim Acta 2000. [DOI: 10.1016/s0020-1693(00)00057-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Perez-Lourido P, Romero J, Garcia-Vazquez J, Sousa A, Maresca KP, Rose DJ, Zubieta J. Synthesis and Characterization of Rhenium Phosphinothiolate Complexes. Crystal and Molecular Structures of [HNEt3][Re{P(C6H4S)3}2], [ReOCl{OP(C6H5)2(C6H4S)}{(P(C6H5)2(C6H4S)}], [Re2O5{P(C6H5)2(C6H4S)}2], and [ReOCl{OP(C6H5)2(2-SC6H3-3-SiMe3)}2]. Inorg Chem 1998. [DOI: 10.1021/ic9715299] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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