Browsing Τμήμα Χημείας / Department of Chemistry by Author "Abboud, K. A."
Now showing items 1-13 of 13
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Giant single-molecule magnets: A {Mn84} torus and its supramolecular nanotubes
Tasiopoulos, Anastasios J.; Vinslava, A.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2004)A meeting of two magnetic worlds: The giant (ca. 4.2 nm) {Mn84} cluster, shown, has a torus structure and is a single-molecule magnet (SMM). It represents a meeting of the molecular (bottom-up) and classical (top-down) ...
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High-nuclearity Ce/Mn and Th/Mn cluster chemistry: Preparation of complexes with [Ce4Mn10O10(OMe)6] 18+ and [Th6Mn10O22(OH) 2]18+ cores
Mishra, Abhudaya; Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2007)The syntheses, structures, and magnetic properties are reported of the mixed-metal complexes [Ce4Mn10O10(OMe) 6(O2-CPh)16(NO3)2(MeOH) 2(H2O)2] (1) and [Th6Mn 10O22(OH)2(O2CPh) 16-(NO3)2(H2O)8] (2), which were both prepared ...
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Mixed transition metal-lanthanide complexes at high oxidation states: Heteronuclear CeIVMnIV clusters
Tasiopoulos, Anastasios J.; Milligan Jr., P. L.; Abboud, K. A.; O'Brien, T. A.; Christou, George (2007)The syntheses of the first mixed-metal CeIVMnIV complexes are reported. [CeMn2O3(O2CMe)(NO 3)4(H2O)2(bpy)2]-(NO 3) (1
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Mixed Transition-Metal - Lanthanide Complexes at Higher Oxidation States: Heteronuclear CeIV-MnIV Clusters
Tasiopoulos, Anastasios J.; O'Brien, T. A.; Abboud, K. A.; Christou, George (2004)Wheels within wheels: A new family of mixed cerium(IV)-manganese(IV) clusters has been prepared spanning a range of Ce:Mn ratios from 3:2 to 1:6. The unusual core of the latter CeMn6 complex is shown (Ce green, Mn blue, O ...
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[Mn12O12(OMe)2(O2CPh) 16(H2O)2]2- single-molecule magnets and other manganese compounds from a reductive aggregation procedure
Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2005)A new synthetic procedure has been developed in Mn cluster chemistry involving reductive aggregation of permanganate (MnO4-) ions in MeOH in the presence of benzoic acid, and the first products from its use are described. ...
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Molecules at the Quantum-Classical Nanoparticle Interface: Giant Mn70 Single-Molecule Magnets of ∼4 nm Diameter
Vinslava, A.; Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2016)Two Mn70 torus-like molecules have been obtained from the alcoholysis in EtOH and 2-ClC2H4OH of [Mn12O12(O2CMe)16(H2O)4]·4H2O·2MeCO2H (1) in the presence of NBun4MnO4 and an excess of MeCO2H. The reaction in EtOH afforded ...
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New mixed-valence Mn6II/III complexes bearing oximato and azido ligands: Synthesis, and structural and magnetic characterization
Lampropoulos, Christos; Stamatatos, Theocharis C.; Manos, Manolis J.; Tasiopoulos, Anastasios J.; Abboud, K. A.; Christou, George (2010)The combined use of the anion of methyl 2-pyridyl ketone oxime (mpko -) and azides (N3-) in non-carboxylate Mn chemistry has afforded two new Mn6 clusters, [Mn6O 3(N3)3(mpko)6(H2O) 3](ClO4J2 (1) and [Mn6O3(N3) 5(mpko)6(H2O)] ...
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A novel aggregate of [Mn2(μ-O)2] units: [Mn8O10(O2CMe)6(H2O) 2(bpy)6]4+ with a serpentine core
Tasiopoulos, Anastasios J.; Abboud, K. A.; Christou, George (2003)The synthesis, characterization and initial reactivity studies are reported of the mixed-valence (MnIV 6MnIII 2) title compound, which possesses an unusual serpentine-like core and is the highest average oxidation state ...
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Preparation and crystal structures of MnII, mixed-valent MnII/MnIII, and MnIII polymeric compounds
Tasiopoulos, Anastasios J.; Harden, N. C.; Abboud, K. A.; Christou, George (2003)The preparation and crystal structures of three polymeric Mn compounds are reported. The comproportionation reaction between Mn(OAc)2·4H2O and KMnO4 in MeOH-AcOH (2:3) leads to isolation of {[Mn(OH)(OAc)2]·AcOH·H2O}n (1). ...
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A reductive-aggregation route to [Mn12O12(OMe) 2(O2CPh)16(H2O)2] 2- single-molecule magnets related to the [Mn12] family
Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2004)Axes of power: Jahn-Teller isomerism (that is, Jahn-Teller distortion along different axes) accounts for the presence of both faster and slower relaxing magnetization dynamics of the title compound (see core structure
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Single-molecule magnets: A family of MnIII/CeIV complexes with a [Mn8CeO8]12+ core
Mishra, Abhudaya; Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Moushi, Eleni E.; Moulton, B.; Zaworotko, M. J.; Abboud, K. A.; Christou, George (2008)Four heterometallic, enneanuclear Mn8Ce clusters [Mn 8CeO8(O2CMe)12(H2O) 4] (4), [Mn8CeO8(O2CMe) 12(py)4] (5), [Mn8CeO8(O 2CPh)12(MeCN)4] [Mn8CeO 8(O2CPh)12(dioxane)4] (6), and [Mn8CeO8(O2CCHPh2) 12(H2O)4] (7) have been ...
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Symmetric and asymmetric dinuclear manganese(IV) complexes possessing a [MnIV2(μ-O)2(μ-O2 CME)3+ core and terminal Cl- ligands
Bhaduri, S.; Tasiopoulos, Anastasios J.; Bolcar, M. A.; Abboud, K. A.; Streib, W. E.; Christou, George (2003)The synthesis of new dinuclear manganese(IV) complexes possessing the [MnIV2(μ-O)2(μ-O2C Me)]3+ core and containing halide ions as terminal ligands is reported, [Mn2O2(O2CMe)Cl2 (bpy)2]2[MnCl4] (1
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Two isomeric [Mn12O12(OMe)2(O 2CPh)16(H2O)2]2- single-molecule magnets and a MnIII polymer prepared by a reductive aggregation synthetic route
Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2005)We describe a new synthetic procedure in Mn cluster chemistry involving reductive aggregation of permanganate (MnO4-) ions in MeOH/benzoic acid solution and the first two products that were obtained from this procedure. ...