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Salehi M, Galini M, Kubicki M, Khaleghian A. Synthesis and Characterization of New Cobalt(III) and Nickel(II) Complexes Derived from Acetylacetone and 2-Aminopyridine: a New Precursor for Preparation of NiO Nanoparticles. RUSS J INORG CHEM+ 2019. [DOI: 10.1134/s0036023619010170] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hassanpoor A, Mirzaei M, Niknam Shahrak M, Majcher AM. Developing a magnetic metal organic framework of copper bearing a mixed azido/butane-1,4-dicarboxylate bridge: magnetic and gas adsorption properties. Dalton Trans 2018; 47:13849-13860. [PMID: 30222175 DOI: 10.1039/c8dt02986e] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A magnetic metal organic framework {[Cu(but-1,4-dc)0.5(N3)(H2O)]·H2O}n (MFUM-1(Cu)) (but-1,4-dc = butane-1,4-dicarboxylate) was synthesized and characterized structurally and magnetically. In MFUM-1(Cu), each CuII ion has a distorted octahedral geometry with an obvious Jahn-Teller distortion, where the coordination environment is composed of mixed EO-azido/aliphatic based carboxylate/H2O threefold bridges. These bridges extend the structure of MFUM-1(Cu) in two dimensions by covalent connectivity and form square-shaped channels. Also, a study was done to determine the effectiveness of sonochemical synthesis for the preparation of nano-sheets of MFUM-1(Cu) and subsequently the influence of particle size on physical properties such as magnetic behavior and thermal stability. The particles were characterized by elemental analyses, infrared spectroscopy (IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD) analyses. The effects of parameters such as concentration, solvent, and reaction time on the size distribution, morphology, and yield of product were carefully studied. The magnetic properties of MFUM-1(Cu) and corresponding nano-structure were examined which indicated metamagnetism with strong intrachain ferromagnetic coupling versus the weak interchain antiferromagnetic coupling. Finally, the application of MFUM-1(Cu) in the separation of carbon dioxide from nitrogen and also from methane was theoretically investigated. High calculated selectivity of CO2 over N2 and CH4 reveals the potential application of MFUM-1(Cu) in practical systems of gas separation.
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Affiliation(s)
- Azam Hassanpoor
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
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Pankov IV, Shcherbakov IN, Tkachev VV, Levchenkov SI, Popov LD, Lukov VV, Aldoshin SM, Kogan VA. The magnetic exchange interaction in bi- and tetranuclear copper(II) complexes with the bis -azomethine of 1,3-diaminopropanol-2 and 4-hydroxy-3-formylcoumarin with an azide exogenous bridge. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Pandey P, Kharediya B, Elrez B, Sutter JP, Sunkari SS. [Cu 2(en) 2(N 3) 4] n – A new member in the family of copper(II)-azido assemblies: structural and magnetic studies. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1290798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Priyanka Pandey
- Department of Chemistry, Mahila Mahavidyalay, Banaras Hindu University, Varanasi, India
| | - Bhagwan Kharediya
- Department of Chemistry, Mahila Mahavidyalay, Banaras Hindu University, Varanasi, India
| | - Bahjat Elrez
- CNRS, LCC, Laboratoire de Chimie de Coordination, Toulouse, France
- Université de Toulouse, UPS, INPT, LCC, Toulouse, France
| | - Jean-Pascal Sutter
- CNRS, LCC, Laboratoire de Chimie de Coordination, Toulouse, France
- Université de Toulouse, UPS, INPT, LCC, Toulouse, France
| | - Sailaja S. Sunkari
- Department of Chemistry, Mahila Mahavidyalay, Banaras Hindu University, Varanasi, India
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Perdih F. Cu II and Zn II β-diketonate coordination polymers based on pyrimidin-2-amine, pyrazine and 1,2-bis(4-pyridyl)ethane. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2016; 72:828-835. [PMID: 27910833 DOI: 10.1107/s2052520616014566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
Copper(II) and zinc(II) bis(4,4,4-trifluoro-1-phenylbutane-1,3-dionato) compounds with pyrimidin-2-amine (pyr2a), pyrazine (pyz) and 1,2-bis(4-pyridyl)ethane (dpet) were prepared and solid-state structures of coordination polymers [M(tfpb)2(pyr2a)]∞ [M = Cu (1), Zn (2); tfpb = 4,4,4-trifluoro-1-phenylbutane-1,3-dionate], [M(tfpb)2(pyz)]∞ [M = Cu (3), Zn (4a, 4b)] and [Cu(tfpb)2(dpet)]∞ (5), respectively, were determined by single-crystal X-ray analysis. The coordination of metal centers in all compounds is octahedral with nitrogen ligands occupying the axial positions. Compound (1) crystallizes in the triclinic space group P\bar 1, whereas (2) crystallizes in the monoclinic space group P2/n. Differences are due to the different orientation of adjacent M(tfpb)2 units, whereas the orientation of pyrimidin-2-amine is the same in both compounds. Polymeric chains in (1) and (2) contain intramolecular N-H...O hydrogen bonding between amino and carbonyl groups. Room-temperature structures (3) and (4a) are isomorphous adopting the monoclinic space group C2/m; however, on cooling crystals (4a) to 150 K a single-crystal-to-single-crystal transformation to (4b) possessing the triclinic space group P\bar 1 was observed. Compound (5) crystallizes in the triclinic space group P\bar 1 and contains a parallel aggregation of chains in contrast to the known structure of the non-fluorinated benzoylacetonato ligand, where chains aggregate in a perpendicular fashion. In the compounds studied intramolecular C-H...O and/or C-H...F interactions are present. The neighboring chains are linked by π...π interactions and in some compounds also by C-H...π interactions [(1), (4b), (5)].
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Affiliation(s)
- Franc Perdih
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, PO Box 537, SI-1000 Ljubljana, Slovenia
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Karthikeyan A, Thomas Muthiah P, Perdih F. Supramolecular architectures in Co(II) and Cu(II) complexes with thiophene-2-carboxylate and 2-amino-4,6-dimethoxypyrimidine ligands. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2016; 72:442-50. [PMID: 27146575 DOI: 10.1107/s2053229616006148] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/12/2016] [Indexed: 01/21/2023]
Abstract
The coordination chemistry of mixed-ligand complexes continues to be an active area of research since these compounds have a wide range of applications. Many coordination polymers and metal-organic framworks are emerging as novel functional materials. Aminopyrimidine and its derivatives are flexible ligands with versatile binding and coordination modes which have been proven to be useful in the construction of organic-inorganic hybrid materials and coordination polymers. Thiophenecarboxylic acid, its derivatives and their complexes exhibit pharmacological properties. Cobalt(II) and copper(II) complexes of thiophenecarboxylate have many biological applications, for example, as antifungal and antitumor agents. Two new cobalt(II) and copper(II) complexes incorporating thiophene-2-carboxylate (2-TPC) and 2-amino-4,6-dimethoxypyrimidine (OMP) ligands have been synthesized and characterized by X-ray diffraction studies, namely (2-amino-4,6-dimethoxypyrimidine-κN)aquachlorido(thiophene-2-carboxylato-κO)cobalt(II) monohydrate, [Co(C5H3O2S)Cl(C6H9N3O2)(H2O)]·H2O, (I), and catena-poly[copper(II)-tetrakis(μ-thiophene-2-carboxylato-κ(2)O:O')-copper(II)-(μ-2-amino-4,6-dimethoxypyrimidine-κ(2)N(1):N(3))], [Cu2(C5H3O2S)4(C6H9N3O2)]n, (II). In (I), the Co(II) ion has a distorted tetrahedral coordination environment involving one O atom from a monodentate 2-TPC ligand, one N atom from an OMP ligand, one chloride ligand and one O atom of a water molecule. An additional water molecule is present in the asymmetric unit. The amino group of the coordinated OMP molecule and the coordinated carboxylate O atom of the 2-TPC ligand form an interligand N-H...O hydrogen bond, generating an S(6) ring motif. The pyrimidine molecules also form a base pair [R2(2)(8) motif] via a pair of N-H...N hydrogen bonds. These interactions, together with O-H...O and O-H...Cl hydrogen bonds and π-π stacking interactions, generate a three-dimensional supramolecular architecture. The one-dimensional coordination polymer (II) contains the classical paddle-wheel [Cu2(CH3COO)4(H2O)2] unit, where each carboxylate group of four 2-TPC ligands bridges two square-pyramidally coordinated Cu(II) ions and the apically coordinated OMP ligands bridge the dinuclear copper units. Each dinuclear copper unit has a crystallographic inversion centre, whereas the bridging OMP ligand has crystallographic twofold symmetry. The one-dimensional polymeric chains self-assemble via N-H...O, π-π and C-H...π interactions, generating a three-dimensional supramolecular architecture.
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Affiliation(s)
- Ammasai Karthikeyan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | | | - Franc Perdih
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, PO Box 537, SI-1000 Ljubljana, Slovenia
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Eshtiagh-Hosseini H, Yousefi Z, Puschmann H. A coordination network constructed by heteroleptic Co(II) complex built upon intermolecular hydrogen bonds: Synthesis and characterization. J STRUCT CHEM+ 2015. [DOI: 10.1134/s0022476614080307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Room Temperature Synthesis, Crystal Structure and Magnetic Property of a Two-Dimensional Copper(II) Polymer Bridged by End-On and End-to-End Azide Bridges. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0787-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Mukherjee S, Mukherjee PS. Versatility of azide in serendipitous assembly of copper(II) magnetic polyclusters. Acc Chem Res 2013; 46:2556-66. [PMID: 24246001 DOI: 10.1021/ar400059q] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Engineering at the molecular level is one of the most exciting new developments for the generation of functional materials. However, the concept of designing polynuclear extended structures from bottom up is still not mature. Although progress has been made with secondary building units (SBUs) in metal organic frameworks (MOFs), the control seems to be just an illusion when it comes to bridging ligands such as the azide ion. When we say that the azido ligand is versatile in its bridging capabilities, what we mean is that it would be difficult to predict or control its bridging properties. However, this kind of serendipity is not always bad news. For example, scientists have shown that the azido ligand can mediate magnetic exchanges between paramagnetic metals in a predictable fashion (usually depending upon the bonding geometries). Therefore, it is a well-respected ligand in polynuclear assemblies. Serendipitous assemblies offer new magnetic structures that we may not otherwise even think about synthesizing. The azido ligand forms a variety of complexes with copper(II) using different blocking amines or pyridine based ligands. Its structural nature changes upon changing the substitution on amine, as well as the amount of blocking ligand. In principle, if we take any of these complexes and provide more coordination sites to the bridging azido ligands by removing a fraction of the blocking ligands, we can get new complexes with intricate structural networks and therefore different magnetic properties with the same components as used for the parent complex. In this Account, we mainly discuss the development of a number of new topological and magnetic exchange systems synthesized using this concept. Not all of these new complexes can be grouped according to their basic building structures or even by the ratio of the metal to blocking ligand. Therefore, we divided the discussion by the nuclearity of the basic building structures. Some of the complexes with the same nuclearities have very similar or even almost identical basic structures. However, the way these building units are joined together (by the azido bridges) to form the overall extended structures differ almost in every case. The complexes having the Cu6 core are particularly interesting from a structural point of view. Although they have almost identical basic structures, some of them are extended in three dimensions, but two of them are extended in two dimensions by two different bridging networks. In the complexes having linear Cu4 basic units, we find that using similar ligands does not always give the same bridging networks even within the basic building structures. These complexes have also enriched the field of molecular magnetism. One of the complexes with a Cu3 building unit has provided us with the opportunity to study the competing behavior of two different kinds of magnetic exchange mechanism (ferromagnetic and antiferromagnetic) acting simultaneously between two metal ions. Through density functional theory calculations, we showed how they work independently and their additive nature to produce the overall effect. The exciting methodology for the generation of copper(II) polyclusters presented in this Account will provide the opportunity to explore analogous serendipitous assembly of diverse structures with interesting magnetic behavior using other transition metal ions having more than one unpaired electrons.
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Affiliation(s)
- Sandip Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
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Buvaylo OA, Kokozay VN, Ischenko MV, Vassilyeva OY, Skelton BW. New nickel mixed-ligand complex containing 2-aminopyrimidine and 5-bromosalicylaldehyde with a one-dimensional hydrogen bonded structure. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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A dinuclear end-on azide-bridged copper(II) compound with weak antiferromagnetic interaction – Synthesis, characterization, magnetism and X-ray structure of bis[(μ-azido-κN1)-(azido-κN1)(1,3-bis(benzimidazol-2-yl)-2-methylpropane)copper(II)]. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.11.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Zhang LF, Yu MM, Ni ZH, Cui AL, Kou HZ. Synthesis, crystal structure and magnetic properties of a one-dimensional copper(II) polymer bridged by different double end-on azide bridges. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.10.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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13
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van Albada GA, van der Horst MG, Mutikainen I, Turpeinen U, Reedijk J. Dinuclear and polynuclear Cu(II) azido-bridged compounds with 7-azaindole as a ligand. Synthesis, characterization and 3D structures. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.11.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Single end-on azido bridged 1D chain copper(II) complex: Synthesis, X-ray crystal structure and catalytic activity in homogeneous epoxidation of cyclooctene. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.04.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Liu FC, Zhao JP, Hu BW, Zeng YF, Ribas J, Bu XH. One-dimensional metal-azido complex constructed by a double EO azido bridged trinuclear nickel(ii) unit: synthesis, structure and magnetic properties. Dalton Trans 2010; 39:1185-7. [DOI: 10.1039/b915616j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Sengupta O, Gole B, Mukherjee S, Mukherjee PS. A series of transition metal–azido extended complexes with various anionic and neutral co-ligands: synthesis, structure and their distinct magnetic behavior. Dalton Trans 2010; 39:7451-65. [DOI: 10.1039/c0dt00181c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Mukherjee S, Gole B, Chakrabarty R, Mukherjee PS. CuII-Azide Polymers of Cu3 and Cu6 Building Units: Synthesis, Structures, and Magnetic Exchange Mechanism. Inorg Chem 2009; 48:11325-34. [DOI: 10.1021/ic901844j] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sandip Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Bappaditya Gole
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Rajesh Chakrabarty
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
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Tong SF, Yang H, Lao YN, Liu GH, Wu HX, Yang SP, Yu J, Tan H, Li W. Syntheses, Crystal Structures, and Properties of Two Novel Trinuclear Copper Complexes Constructed by a Tripodal Heptadentate Ligand Containing Three Imidazolate Groups. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200801420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Majumder S, Koner R, Lemoine P, Nayak M, Ghosh M, Hazra S, Lucas CR, Mohanta S. Role of Coordinated Water and Hydrogen‐Bonding Interactions in Stabilizing Monophenoxido‐Bridged Triangular Cu
II
M
II
Cu
II
Compounds (M = Cu, Co, Ni, or Fe) Derived from
N
,
N′
‐Ethylenebis(3‐methoxysalicylaldimine): Syntheses, Structures, and Magnetic Properties. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900281] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Samit Majumder
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India, Fax: +91‐33‐23519755
| | - Rajesh Koner
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India, Fax: +91‐33‐23519755
| | - Pascale Lemoine
- Laboratoire de Cristallographie et RMN biologiques UMR 8015, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l'Observatoire, 75006 Paris, France
| | - Malabika Nayak
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India, Fax: +91‐33‐23519755
| | - Meenakshi Ghosh
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Susanta Hazra
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India, Fax: +91‐33‐23519755
| | - C. Robert Lucas
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada, Fax: +709‐737‐3316,
| | - Sasankasekhar Mohanta
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India, Fax: +91‐33‐23519755
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Jiang J, Chu Z, Huang W. One trinuclear copper(II) complex derived from a new Schiff base ligand based on the dianion of 4-chloro-6-(hydroxymethyl)-2-((3-aminopropylimino)methyl)-phenol: Synthesis, structure, spectroscopic and magnetic properties. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Liu JJ, He X, Shao M, Li MX. Syntheses, crystal structures and characterizations of three new copper(II) azide coordination polymers with 1,2,4-triazole ligands. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.09.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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van Albada GA, Dominicus I, Viciano-Chumillas M, Mutikainen I, Turpeinen U, Reedijk J. A unique chain of trinuclear Cu(II) units containing both neutral and anionic N-(pyrimidin-2-yl) acetamide (Haapm, resp. aapm) as a ligand and dicyanamide (dca): Synthesis, characterization, X-ray structure and magnetism of [Cu3(μ-aapm)2(μ-dca)2(Haapm)2](CF3SO3)2. Polyhedron 2008. [DOI: 10.1016/j.poly.2007.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tangoulis V, Panagoulis D, Raptopoulou CP, Dendrinou-Samara C. Low-dimensional copper(ii) complexes triply bridged with azide/carboxylate/DMSO showing very strong ferromagnetic interaction and influence of dipolar fields at low temperatures: a quantum Monte Carlo magnetic study. Dalton Trans 2008:1752-60. [DOI: 10.1039/b716291j] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu G, Jing H, Xue D. Synthesis, crystal structure, and magnetic properties of 1D Azido-bridged copper(II) complex. Struct Chem 2007. [DOI: 10.1007/s11224-007-9254-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Stamatatos TC, Papaefstathiou GS, MacGillivray LR, Escuer A, Vicente R, Ruiz E, Perlepes SP. Ferromagnetic Coupling in a 1D Coordination Polymer Containing a Symmetric [Cu(μ1,1-N3)2Cu(μ1,1-N3)2Cu]2+ Core and Based on an Organic Ligand Obtained from the Solid State. Inorg Chem 2007; 46:8843-50. [PMID: 17867673 DOI: 10.1021/ic070018b] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Addition of rctt-tetrakis(2-pyridyl)cyclobutane (2,2'-tpcb) in a Cu(II)/N(3)- solution afforded the 1D coordination polymer [Cu(3)(N(3))(6)(2,2'-tpcb)(DMF)(2)](n) (1). The ligand 2,2'-tpcb serves as a tetradentate bis-chelating ligand by linking linear [(DMF)Cu(mu(1,1)-N(3))(2)Cu(N(3))(2)(mu(1,1)-N(3))(2)Cu(DMF)] trinuclear units to produce a zigzag chain. Within each centrosymmetric trinuclear unit there exist two irregularly asymmetric end-on double azido-bridged [Cu(mu(1,1)-N(3))(2)Cu](2+) cores, while one of the largest Cu-Nazide-Cu angles is observed. Magnetic susceptibility data, measured from 2 to 300 K, show bulk moderate ferromagnetic coupling within the magnetically isolated trinuclear units. These data were fitted to the appropriate equation derived from the Hamiltonian H = -J(1)(S(A1)S(B) + S(A2)S(B)) - J(2)S(A1)S(A2), giving the parameters J1 = +70(3) cm(-1), J2 = -3(2) cm(-1), g = 2.12(1), with an intertrimer interaction parameter theta = -0.74(2) K. The coupling constants were correlated with the structural parameters. Density functional calculations reproduce very well the experimental J values and show that ferromagnetism for this complex is mainly due to the topology of the magnetic orbitals and the different coordination spheres of two neighboring Cu(II) atoms, resulting in a small overlap of the orbitals possessing the unpaired electrons.
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Youngme S, Chotkhun T, Leelasubcharoen S, Chaichit N, van Albada GA, Viciano-Chumillas M, Reedijk J. An unique trinuclear triply bridged Cu(II) compound containing double acetato and single azido bridges: Synthesis, X-ray structure and magnetism of [Cu3(dpyam)2(μ1,1-N3)2(μ-CH3COO- κ-O1)2(μ-CH3COO-κ-O1,O2)2]·2(H2O) (dpyam=di-2-pyridylamine). INORG CHEM COMMUN 2007. [DOI: 10.1016/j.inoche.2006.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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