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Adhikary A, Ghosh K. Fine tuning of coordination environments by anions on a series of Cu(II) dihydrazide complexes: Syntheses, structures, magnetic properties and solution phase anion exchange. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.04.038] [Citation(s) in RCA: 2] [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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2
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Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5030039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Syntheses, crystal structures and characterization are reported for four new complexes [Cu4Br2(L)4]Br2 (1), [Ni4(NO3)2(L)4(H2O)](NO3)2 (2), [Co2(L)3](ClO4)3 (3) and [Co(L)2](ClO4) (4), where L− is the monoanion of the ditopic ligand N′-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide (LH) built on a picolinoyl hydrazone core fragment, and possessing a bidentate and a tridentate coordination pocket. The tetranuclear cation of 1·0.8H2O·MeOH is a strictly planar, rectangular [2 × 2] grid. Two 2.21011 L− ligands bridge adjacent CuII atoms on the short sides of the rectangle through their alkoxide oxygen atoms, and two 2.11111 ligands bridge adjacent CuII atoms on the long sides of the rectangle through their diazine groups; two metal ions are 5-coordinate and two are 6-coordinate. The tetranuclear cation of 2·0.2H2O·3EtOH is a square [2 × 2] grid. The two 6-coordinate NiII atoms of each side of the square are bridged by the alkoxide O atom of one 2.21011 L− ligand. The dinuclear cation of 3·0.8H2O·1.3MeOH contains two low-spin octahedral CoIII ions bridged by three 2.01111 L− ligands forming a pseudo triple helicate. In the mononuclear cation [Co(L)2]+ of complex 4, the low-spin octahedral CoIII center is coordinated by two tridentate chelating, meridional 1.10011 ligands. The crystal structures of the complexes are stabilized by a variety of π–π stacking and/or H-bonding interactions. Compounds 2, 3 and 4 are the first structurally characterized nickel and cobalt complexes of any form (neutral or anionic) of LH. The 2.01111 and 1.10011 coordination modes of L−, observed in the structures of complexes 3 and 4, have been crystallographically established for the first time in coordination complexes containing this anionic ligand. Variable-temperature, solid-state dc magnetic susceptibility and variable-field magnetization studies at 1.8 K were carried out on complexes 1 and 2. Antiferromagnetic metal ion···metal ion exchange interactions are present in both complexes. The study reveals that the cation of 1 can be considered as a practically isolated pair of strongly antiferromagnetically coupled (through the diazine group of L−) dinulear units. The susceptibility data for 2 were fit to a single-J model for an S = 1 cyclic tetramer. The values of the J parameters have been rationalized in terms of known magnetostructural correlations. Spectral data (infrared (IR), ultraviolet/visible (UV/VIS), 1H nuclear magnetic resonance (NMR) for the diamagnetic complexes) are also discussed in the light of the structural features of 1–4 and the coordination modes of the organic and inorganic ligands that are present in the complexes. The combined work demonstrates the ligating flexibility of L−, and its usefulness in the synthesis of complexes with interesting structures and properties.
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Anwar MU, Al-Harrasi A, Pilkington M, Gavey EL, Rawson JM. A linear tetranuclear Cu(II) complex exhibiting both ferro and antiferromagnetic couplings: Synthesis, characterization and magneto-structural studies. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Anwar MU, Al-Harrasi A, Gavey EL, Pilkington M, Rawson JM, Thompson LK. A new nitrogen rich open chain diazine ligand system: synthesis coordination chemistry and magneto-structural studies. Dalton Trans 2018; 47:2511-2521. [PMID: 29302666 DOI: 10.1039/c7dt03845c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and coordination chemistry of a new series of open chain diazine based ligands (L3aH2, L3bH2, and L3cH2) is reported. The ligands comprise a central disubstituted bipyridine moiety with two bridging alkoxide oxygen donors, together with diazine and pyridine terminal groups strategically located to coordinate three metal centres. Reactions of L3aH2 and L3bH2 with CuX2 (X- = ClO4, Cl, NO3) yield a trinuclear complex (1) and 1-D copper chains (2, 3). In these complexes the ligands bind copper ions via Nbipyridne, trans Ndiazine, Ohydrazone, and Npyridne donors while vacant sites are occupied by counter ions or solvent molecules (methanol, water, acetonitrile). Reaction of L3cH2 with MnCl2 affords a linear trinuclear Mn complex (4), where the Mn(ii) ions are connected via μ2-Ohydrazone linkers with no N-N bridging. Reaction of L3aH2 with Fe(SO3CF3)2 yields a tetranuclear mixed valence Fe complex (5), in which both trans N-N and Ohydrazone bridging is observed. Magnetic studies reveal the presence of moderate to strong antiferromagnetic interactions in complexes 1-4 while a mix of ferromagnetic and antiferromagnetic interactions is observed in complex 5.
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Affiliation(s)
- Muhammad U Anwar
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, P O Box 33, PC 616, Birkat Almouz., Nizwa, Oman.
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Mahjoobizadeh M, Mirzaei M, Bauzá A, Lippolis V, Aragoni MC, Shamsipur M, Ghanbari M, Frontera A. Coordination Behavior of Chelidamic Acid With V V, Ni II, Fe III, and Ca II: Syntheses, X-ray Characterization and DFT Studies. ChemistrySelect 2016. [DOI: 10.1002/slct.201600150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Milad Mahjoobizadeh
- Department of Chemistry; Ferdowsi University of Mashhad; 917751436 Mashhad Iran
| | - Masoud Mirzaei
- Department of Chemistry; Ferdowsi University of Mashhad; 917751436 Mashhad Iran
| | - Antonio Bauzá
- Departament de Química; Universitat de les Illes Balears; Crta de Valldemossa km 7.5 07122 Palma de Mallorca (Baleares) SPAIN
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche,.; Universita' degli Studi di Cagliari; Complesso Universitario di Monserrato; S.S. 554 Bivio per Sestu 09042 Monserrato (CA) Italy
| | - M. Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche,.; Universita' degli Studi di Cagliari; Complesso Universitario di Monserrato; S.S. 554 Bivio per Sestu 09042 Monserrato (CA) Italy
| | | | | | - Antonio Frontera
- Departament de Química; Universitat de les Illes Balears; Crta de Valldemossa km 7.5 07122 Palma de Mallorca (Baleares) SPAIN
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Mahmoudi G, Bauzá A, Rodríguez-Diéguez A, Garczarek P, Kaminsky W, Frontera A. Synthesis, X-ray characterization, DFT calculations and Hirshfeld surface analysis studies of carbohydrazone based on Zn(ii) complexes. CrystEngComm 2016. [DOI: 10.1039/c5ce01915j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Five Zn(ii) complexes based on a N4O core carbohydrazone ligand have been synthesized and X-ray characterized. The noncovalent interactions that govern the crystal packing have been rationalized by means of DFT calculations.
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Affiliation(s)
- Ghodrat Mahmoudi
- Department of Chemistry
- Faculty of Science
- University of Maragheh
- Maragheh, Iran
| | - Antonio Bauzá
- Departamento de Quimica
- Universitat de les IllesBalears
- 07122 Palma de Mallorca (Baleares), Spain
| | | | - Piotr Garczarek
- Faculty of Chemistry
- Wrocław University of Technology
- 50-370 Wrocław, Poland
| | | | - Antonio Frontera
- Departamento de Quimica
- Universitat de les IllesBalears
- 07122 Palma de Mallorca (Baleares), Spain
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Magnetic properties of transition metal (Mn(II), Mn(III), Ni(II), Cu(II)) and lanthanide (Gd(III), Dy(III), Tb(III), Eu(III), Ho(III), Yb(III)) clusters and [nxn] grids: Isotropic exchange and SMM behaviour. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Extended structures in copper(II) complexes with 4-hydroxypyridine-2,6-dicarboxylate and pyrimidine derivative ligands: X-ray crystal structure, solution and magnetic studies. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.04.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Anwar MU, Dawe LN, Parsons SR, Tandon SS, Thompson LK, Dey SK, Mereacre V, Reiff WM, Bunge SD. Oligonuclear Fe Complexes (Fe, Fe4, Fe6, Fe9) Derived from Tritopic Pyridine Bis-Hydrazone Ligands—Structural, Magnetic, and Mössbauer Studies. Inorg Chem 2014; 53:4655-68. [DOI: 10.1021/ic500348k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Muhammad U. Anwar
- Department of Chemistry, Memorial University, St. John’s, Newfoundland A1B3X7, Canada
| | - Louise N. Dawe
- Department of Chemistry, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5, Canada
| | - Stewart R. Parsons
- Department of Chemistry, Memorial University, St. John’s, Newfoundland A1B3X7, Canada
| | - Santokh S. Tandon
- Department of Chemistry, Kent State University—Salem, Salem, Ohio 44460, United States
| | - Laurence K. Thompson
- Department of Chemistry, Memorial University, St. John’s, Newfoundland A1B3X7, Canada
| | - Subrata K. Dey
- Department of Chemistry, Memorial University, St. John’s, Newfoundland A1B3X7, Canada
| | - Valeriu Mereacre
- Department of Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - William M. Reiff
- Department of Chemistry, Northeastern University, Boston, Massachusetts 02115, United States
| | - Scott D. Bunge
- Department of
Chemistry, Kent State University, Kent, Ohio 44242, United States
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Adhikary A, Sheikh JA, Konar AD, Konar S. Synthesis, crystal structure, magnetic study and magneto-structural correlation of three Cu(ii) complexes formed via pyridine bis(hydrazone) based ligand. RSC Adv 2014. [DOI: 10.1039/c3ra45928d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Cu(II) complexes of pyridine-2,6-dicarboxylate and N-donor neutral ligands: Synthesis, crystal structure, thermal behavior, DFT calculation and effect of aromatic compounds on their fluorescence. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.06.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Hardy JG. Metallosupramolecular grid complexes: towards nanostructured materials with high-tech applications. Chem Soc Rev 2013; 42:7881-99. [DOI: 10.1039/c3cs60061k] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhu X, Zhao S, Peng YF, Li BL, Wu B. A (3,14)-connected three-dimensional metal–organic framework based on the unprecedented enneanuclear copper(ii) cluster [Cu9(μ3-OH)4(μ2-OH)2]. CrystEngComm 2013. [DOI: 10.1039/c3ce41086b] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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14
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Anwar MU, Tandon SS, Dawe LN, Habib F, Murugesu M, Thompson LK. Lanthanide Complexes of Tritopic Bis(hydrazone) Ligands: Single-Molecule Magnet Behavior in a Linear DyIII3 Complex. Inorg Chem 2011; 51:1028-34. [DOI: 10.1021/ic2022006] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Muhammad U. Anwar
- Department of Chemistry, Memorial University, St. John’s,
Newfoundland A1B 3X7, Canada
| | - Santokh S. Tandon
- Department of Chemistry, Kent State University at Salem, Salem,
Ohio 44460, United States
| | - Louise N. Dawe
- Department of Chemistry, Memorial University, St. John’s,
Newfoundland A1B 3X7, Canada
| | - Fatemah Habib
- Department of Chemistry, University of Ottawa, 10 Marie Curie,
Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department of Chemistry, University of Ottawa, 10 Marie Curie,
Ottawa, Ontario K1N 6N5, Canada
| | - Laurence K. Thompson
- Department of Chemistry, Memorial University, St. John’s,
Newfoundland A1B 3X7, Canada
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15
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Wang Y, Liu Z, Wang Y, Gao J, Li Y. Comparative study of two new grid complexes: synthesis, X-ray structure characterization, thermogravimetric, and spectroscopic properties. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.639873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Yuan Wang
- a College of Chemical and Biological Engineering, Guilin University of Technology , Guilin 541004 , PR China
- b Center for Structural and Molecular Biology, Institute of Biophysics, Chinese Academy of Sciences , Beijing 100101 , PR China
| | - Zheng Liu
- a College of Chemical and Biological Engineering, Guilin University of Technology , Guilin 541004 , PR China
| | - Yongliao Wang
- c College of Environmental Science and Engineering, South China University of Technology , Guangzhou 510006 , PR China
| | - Jiongyang Gao
- a College of Chemical and Biological Engineering, Guilin University of Technology , Guilin 541004 , PR China
| | - Yanhong Li
- d Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology , Guilin 541004 , PR China
- e College of Environmental Science and Engineering, Guilin University of Technology , Guilin 541004 , PR China
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16
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Qin S, Nie C, Weng Z, Chen Z, Liang F. Three Copper(II) Complexes of a “Tritopic” Hydrazone Ligand: Synthesis and Structural Characterization. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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A 1D zinc(II) polymer with W-like pentanuclear secondary building blocks constructed by 2,6-pyridine-diacylhydrazone ligand. Struct Chem 2011. [DOI: 10.1007/s11224-011-9733-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Anwar MU, Thompson LK, Dawe LN. Spin frustration in a Cu(ii)3 triangle frustrated? Dalton Trans 2011; 40:1437-40. [DOI: 10.1039/c0dt01606c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- Adrian‐Mihail Stadler
- Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg, 8 allée Gaspard Monge, Strasbourg 67083, France
- Karlsruhe Institute of Technology (KIT), Forschungszentrum Karlsruhe (FZK), Institute for Nanotechnology (INT), Postfach 3640, 76021 Karlsruhe, Germany
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20
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Shulman A, Langer V, Palmqvist AE. Structural analysis of the microporous semiconductor K-SBC-1 during its reversible sorption of water. J SOLID STATE CHEM 2009. [DOI: 10.1016/j.jssc.2009.05.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Shuvaev KV, Abedin TSM, McClary CA, Dawe LN, Collins JL, Thompson LK. Ligand directed self-assembly vs. metal ion coordination algorithm—when does the ligand or the metal take control? Dalton Trans 2009:2926-39. [DOI: 10.1039/b818939k] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Dawe LN, Shuvaev KV, Thompson LK. Polytopic ligand directed self-assembly—polymetallic [n×n] grids versus non-grid oligomers. Chem Soc Rev 2009; 38:2334-59. [DOI: 10.1039/b807219c] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhu AX, Zhang JP, Lin YY, Chen XM. Pentanuclear and Heptanuclear Helicates By Self-Assembly of d10 Metal Ions and a Rigid Aromatic Bis-Bidentate Chelator. Inorg Chem 2008; 47:7389-95. [DOI: 10.1021/ic8007969] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ai-Xin Zhu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry/State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jie-Peng Zhang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry/State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Yan-Yong Lin
- MOE Laboratory of Bioinorganic and Synthetic Chemistry/State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiao-Ming Chen
- MOE Laboratory of Bioinorganic and Synthetic Chemistry/State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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Bai ZS, Liu GX, Lu Y, Sun WY. Preparation, structure, magnetic and photoluminescence properties of copper(II) and cadmium(II) frameworks with 4,4′-bipyridine-2,2′,6,6′-tetracarboxylate. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dinuclear Cu(II) complexes using pyridine-2,6-dicarboxylate in combination with O/N donor spacer. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.07.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Dawe LN, Abedin TSM, Thompson LK. Liganddirected self-assembly of polymetallic [n × n] grids: rational routes to large functional molecular subunits? Dalton Trans 2008:1661-75. [DOI: 10.1039/b716114j] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Niel V, Milway VA, Dawe LN, Grove H, Tandon SS, Abedin TSM, Kelly TL, Spencer EC, Howard JAK, Collins JL, Miller DO, Thompson LK. Coordination “Oligomers” in Self-Assembly Reactions of Some “Tritopic” Picolinic Dihydrazone LigandsMononuclear, Dinuclear, Hexanuclear, Heptanuclear, and Nonanuclear Examples. Inorg Chem 2007; 47:176-89. [DOI: 10.1021/ic7016787] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Virginie Niel
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Victoria A. Milway
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Louise N. Dawe
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Hilde Grove
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Santokh S. Tandon
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Tareque S. M. Abedin
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Timothy L. Kelly
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Elinor C. Spencer
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Judith A. K. Howard
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Julie L. Collins
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - David O. Miller
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
| | - Laurence K. Thompson
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada, University of Durham, South Road, Durham DH1 3LE, U.K., and Kent State University, Salem Campus, Salem, Ohio 44460
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Dey SK, Abedin TSM, Dawe LN, Tandon SS, Collins JL, Thompson LK, Postnikov AV, Alam MS, Müller P. Supramolecular Self-Assembled Polynuclear Complexes from Tritopic, Tetratopic, and Pentatopic Ligands: Structural, Magnetic and Surface Studies. Inorg Chem 2007; 46:7767-81. [PMID: 17696336 DOI: 10.1021/ic070336a] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polymetallic, highly organized molecular architectures can be created by "bottom-up" self-assembly methods using ligands with appropriately programmed coordination information. Ligands based on 2,6-picolyldihydrazone (tritopic and pentatopic) and 3,6-pyridazinedihydrazone (tetratopic) cores, with tridentate coordination pockets, are highly specific and lead to the efficient self-assembly of square [3 x 3] Mn9, [4 x 4] Mn16, and [5 x 5] Mn25 nanoscale grids. Subtle changes in the tritopic ligand composition to include bulky end groups can lead to a rectangular 3 x [1 x 3] Mn9 grid, while changing the central pyridazine to a more sterically demanding pyrazole leads to simple dinuclear copper complexes, despite the potential for binding four metal ions. The creation of all bidentate sites in a tetratopic pyridazine ligand leads to a dramatically different spiral Mn4 strand. Single-crystal X-ray structural data show metallic connectivity through both mu-O and mu-NN bridges, which leads to dominant intramolecular antiferromagnetic spin exchange in all cases. Surface depositions of the Mn9, Mn16, and Mn25 square grid molecules on graphite (HOPG) have been examined using STM/CITS imagery (scanning tunneling microscopy/current imaging tunneling spectroscopy), where tunneling through the metal d-orbital-based HOMO levels reveals the metal ion positions. CITS imagery of the grids clearly shows the presence of 9, 16, and 25 manganese ions in the expected square grid arrangements, highlighting the importance and power of this technique in establishing the molecular nature of the surface adsorbed species. Nanoscale, electronically functional, polymetallic assemblies of this sort, created by such a bottom-up synthetic approach, constitute important components for advanced molecule-based materials.
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Affiliation(s)
- Subrata K Dey
- Department of Chemistry, Memorial University, St. John's, Newfoundland, A1B 3X7, Canada
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Gottschaldt M, Wegner R, Görls H, Jäger EG, Klemm D. Synthesis and Crystal Structure of a Heptanuclear and an Octanuclear Copper(II) Complex Derived from α-D-Glucofuranoses. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200600201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tandon SS, Dawe LN, Milway VA, Collins JL, Thompson LK. Linear copper ‘chain’ complexes with bulky tritopic hydrazone ligands—structural and magnetic studies. Dalton Trans 2007:1948-53. [PMID: 17702175 DOI: 10.1039/b618067a] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tritopic 2,6-picolyl-bis-hydrazone ligands with bulky terminal groups derived from phenyl-pyridyl ketone do not form the expected [3 x 3] grids on reaction with copper(II), but instead form Cu8 'pinwheels', and in the present case linear trinuclear, pentanuclear and chain structures also. Direct bridging between copper ions occurs through micro2-N-N diazine groups, and longer O-C-N hydrazone connections, leading to moderately strong antiferromagnetic exchange between adjacent metal centres. Structural and magnetic properties are discussed in the context of specific orthogonal and non-orthogonal bridges, which can be distinguished and quantified.
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Affiliation(s)
- Santokh S Tandon
- Department of Chemistry, Kent State University, Salem Campus, Salem, OH 44460, USA.
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Milway VA, Abedin ST, Thompson LK, Miller DO. Ferromagnetic Cu8 pinwheel clusters as building blocks for larger magnetic networks: Long-range structural and magnetic ordering. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.10.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Dawe LN, Abedin TSM, Kelly TL, Thompson LK, Miller DO, Zhao L, Wilson C, Leech MA, Howard JAK. Self-assembled polymetallic square grids ([2 × 2] M4, [3 × 3] M9) and trigonal bipyramidal clusters (M5)—structural and magnetic properties. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b602595a] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Milway VA, Abedin SMT, Niel V, Kelly TL, Dawe LN, Dey SK, Thompson DW, Miller DO, Alam MS, Müller P, Thompson LK. Supramolecular ‘flat’ Mn9grid complexes—towards functional molecular platforms. Dalton Trans 2006:2835-51. [PMID: 16751892 DOI: 10.1039/b515801j] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Flat, quantum dot like arrays of closely spaced, electron rich metal centres are seen as attractive subunits for device capability at the molecular level. Mn(II)9 grids, formed by self-assembly processes using 'tritopic' pyridine-2,6-dihydrazone ligands, provide easy and pre-programmable routes to such systems, and have been shown to exhibit a number of potentially useful physical properties, which could be utilized to generate bi-stable molecular based states. Their ability to form surface monolayers, which can be mapped by STM techniques, bodes well for their possible integration into nanometer scale electronic components of the future. This report highlights some new Mn(II)9 grids, with functionalized ligand sites, that may provide suitable anchor points to surfaces and also be potential donor sites capable of further grid elaboration. Structures, magnetic properties, electrochemical properties, surface studies on HOPG (highly ordered pyrolytic graphite), including the imaging of individual metal ion sites in the grid using CITS (current imaging tunneling spectroscopy) are discussed, in addition to an analysis of the photophysics of a stable mixed oxidation state [Mn(III)4Mn(II)5] grid. The grid physical properties as a whole are assessed in the light of reasonable approaches to the use of such molecules as nanometer scale devices.
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Affiliation(s)
- Victoria A Milway
- Department of Chemistry, Memorial University, St. John's, Newfoundland, A1B 3X7, Canada
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Dey SK, Thompson LK, Dawe LN. A self-assembled hexadecanuclear 4 × [2 × 2] Mn(ii)16square grid from a pyridazine bis(hydrazone) ligand: synthesis, structure and magnetism. Chem Commun (Camb) 2006:4967-9. [PMID: 17136263 DOI: 10.1039/b611267f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A compartmentalized {4 x[2 x 2]} Mn(II)16 antiferromagnetically coupled square grid results from the self-assembly reaction of a tetratopic pyridazine bis(hydrazone) ligand and Mn(II).
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Affiliation(s)
- Subrata K Dey
- Dept of Chemistry, Memorial University, St. John's, Newfoundland, CanadaA1B 3X7
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Dragancea D, Arion VB, Shova S, Rentschler E, Gerbeleu NV. Azine-Bridged Octanuclear Copper(II) Complexes Assembled with a One-Stranded Ditopic Thiocarbohydrazone Ligand. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200501807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dragancea D, Arion VB, Shova S, Rentschler E, Gerbeleu NV. Azine-Bridged Octanuclear Copper(II) Complexes Assembled with a One-Stranded Ditopic Thiocarbohydrazone Ligand. Angew Chem Int Ed Engl 2005; 44:7938-42. [PMID: 16287190 DOI: 10.1002/anie.200501807] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Diana Dragancea
- Institute of Chemistry of the Academy of Sciences of R. Moldova strasse Academiei 3, 2028 Chisinau, Moldova
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Waldmann O. Magnetic molecular wheels and grids – the need for novel concepts in “zero-dimensional” magnetism. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.12.019] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Desroches C, Pilet G, Borshch SA, Parola S, Luneau D. Tetranuclear Manganese(II) Complexes of Thiacalixarene Macrocycles with Trigonal Prismatic Six-Coordinate Geometries: Synthesis, Structure, and Magnetic Properties. Inorg Chem 2005; 44:9112-20. [PMID: 16296868 DOI: 10.1021/ic050507g] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two tetranuclear manganese(II) complexes [Mn(II)4(thiaS)2] (1) and [Mn(II)4(thiaSO)2] (2) have been synthesized under solvothermal conditions in methanol with p-tert-butylthiacalix[4]arene (thiaS) and p-tert-butylsulfinylthiacalix[4]arene (thiaSO). For both complexes, the structure has been established from single-crystal X-ray diffraction. [Mn4(thiaS)2].H2O (1) crystallizes in the orthorhombic Immm (No. 71) space group with the following parameters: a = 18.213 (5) angstroms, b = 19.037 (5) angstroms, c = 29.159 (5) angstroms, V = 10110 (4) angstroms3, and Z = 4. [Mn4(thiaSO)2].H2O (2) crystallizes in the monoclinic C2/m (No. 12) space group with the following parameters: a = 33.046(1) angstroms, b = 19.5363 (8) angstroms, c = 15.7773 (9) angstroms, beta = 115.176 (2) degrees, V = 9218.3 (8) angstroms3, and Z = 4. The two complexes are neutral and are best described as manganese squares sandwiched between two thiacalixarene macrocycles. In both complexes, each manganese center is six-coordinated in a trigonal prismatic geometry with four phenoxo oxygen atoms plus two sulfur atoms for 1 or two oxygen atoms from SO groups for 2. The two tetranuclear complexes exhibit identical magnetic behaviors resulting from antiferromagnetic interactions between the four manganese centers. The simulation of the magnetic susceptibility was done considering a single exchange-coupling constant between the manganese(II) ions, J (H = -J(S1S2 + S2S3 + S3S4 + S1S4)). The best fits give the same result for the two complexes: g = 1.94 and J = -5.57 cm(-1).
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Affiliation(s)
- Cédric Desroches
- Université Claude Bernard Lyon-1, Laboratoire des Multimatériaux et Interfaces (UMR 5615), Campus de La Doua, 69622 Villeurbanne Cedex, France
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Thompson LK. 2004 Alcan Award LectureFrom dinuclear to triakontahexanuclear complexes Adventures in supramolecular coordination chemistry. CAN J CHEM 2005. [DOI: 10.1139/v04-173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Polynuclear coordination complexes result from the interplay between the arrangement of the binding sites of a ligand, and their donor content, and the coordination preferences of the metal ion involved. Rational control of the ligand properties, such as denticity, geometry, and size, can lead to large, and sometimes predictable, polynuclear assemblies. This Alcan Award Lecture highlights our "adventures" with polynucleating ligands over the last 25 years, with examples ranging from simple dinucleating to more exotic high-denticity ligands. Complexes with nuclearities ranging from 2 to 36 have been produced, many of which have novel magnetic, electrochemical, and spectroscopic properties. Self-assembly strategies using relatively simple "polytopic" ligands have been very successful in producing high-nuclearity clusters in high yield. For example, linear "tritopic" ligands produce M9 (M = Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II)) [3 × 3], flat grid-like molecules, which have quantum dot-like arrays of nine closely spaced metal centers in electronic communication. Some of these grids are discussed in terms of their novel magnetic and electrochemical properties, and also as multistable nanometer-scale platforms for potential molecular device behaviour. Bigger ligands with extended arrays of coordination pockets, and the capacity to self-assemble into much larger grids, are highlighted to illustrate our current and longer term goals of generating polymetallic molecular two-dimensional layers on surfaces.Key words: Alcan Award Lecture, transition metal, polynuclear, structure, magnetism, electrochemistry, surface studies, molecular device.
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Nitschke JR, Hutin M, Bernardinelli G. The Hydrophobic Effect as a Driving Force in the Self-Assembly of a [2×2] Copper(I) Grid. Angew Chem Int Ed Engl 2004. [DOI: 10.1002/ange.200461308] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Nitschke JR, Hutin M, Bernardinelli G. The Hydrophobic Effect as a Driving Force in the Self-Assembly of a [2×2] Copper(I) Grid. Angew Chem Int Ed Engl 2004; 43:6724-7. [PMID: 15593154 DOI: 10.1002/anie.200461308] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jonathan R Nitschke
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Genève 4, Switzerland.
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Zhao L, Xu Z, Grove H, Milway VA, Dawe LN, Abedin TSM, Thompson LK, Kelly TL, Harvey RG, Miller DO, Weeks L, Shapter JG, Pope KJ. Supramolecular Mn(II) and Mn(II)/Mn(III) Grid Complexes with [Mn9(μ2-O)12] Core Structures. Structural, Magnetic, and Redox Properties and Surface Studies. Inorg Chem 2004; 43:3812-24. [PMID: 15206861 DOI: 10.1021/ic030319v] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of [3 x 3] Mn(II)(9), antiferromagnetically coupled, alkoxide-bridged, square grid complexes, derived from a group of "tritopic" dihydrazide ligands, is described. The outer ring of eight Mn(II) centers in the grids is isolated magnetically from the central Mn(II) ion, leading to an S = 0 ground state for the ring, and an S = 5/2 ground state overall in each case. Exchange in the Mn(II)(8) ring can be represented by a 1D chain exchange model. Rich electrochemistry displayed by these systems has led to the production of Mn(II)/Mn(III) mixed-oxidation-state grids by both electrochemical and chemical means. Structures are reported for [Mn(9)(2poap)(6)](C(2)N(3))(6).10H(2)O (1), [Mn(9)(2poap)(6)](2)[Mn(NCS)(4)(H(2)O)](2)(NCS)(8).10H(2)O (2), [Mn(9)(2poapz)(6)](NO(3))(6).14.5H(2)O (3), [Mn(9)(2popp)(6)](NO(3))(6).12H(2)O (4), [Mn(9)(2pomp)(6)](MnCl(4))(2)Cl(2).2CH(3)OH.7H(2)O (5), and [Mn(9)(Cl2poap)(6)](ClO(4))(9).7H(2)O (6). Compound 1 crystallized in the tetragonal system, space group P4(2)/n, with a = 21.568(1) A, c = 16.275(1) A, and Z = 2. Compound 2 crystallized in the triclinic system, space group P, with a = 25.043(1) A, b = 27.413(1) A, c = 27.538(2) A, alpha = 91.586(2) degrees, beta = 113.9200(9) degrees, gamma = 111.9470(8) degrees, and Z = 2. Compound 3 crystallized in the triclinic system, space group P, with a = 18.1578(12) A, b = 18.2887(12) A, c = 26.764(2) A, alpha = 105.7880(12) degrees, beta = 101.547(2) degrees, gamma = 91.1250(11) degrees, and Z = 2. Compound 4 crystallized in the tetragonal system, space group P4(1)2(1)2, with a = 20.279(1) A, c = 54.873(6) A, and Z = 4. Compound 5 crystallized in the tetragonal system, space group I, with a = 18.2700(2) A, c = 26.753(2) A, and Z = 2. Compound 6 crystallized in the triclinic system, space group P, with a = 19.044(2) A, b = 19.457(2) A, c = 23.978(3) A, alpha = 84.518(3) degrees, beta = 81.227(3) degrees, gamma = 60.954(2) degrees, and Z = 2. Preliminary surface studies on Au(111), with a Mn(II) grid complex derived from a sulfur-derivatized ligand, indicate monolayer coverage via gold-sulfur interactions, and the potential for information storage at high-density levels.
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Affiliation(s)
- Liang Zhao
- Department of Chemistry, Memorial University, St. John's, Newfoundland A1B 3X7, Canada
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