Browsing by Author "Christou, George"
Now showing items 1-20 of 45
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1-D coordination polymers consisting of a high-spin Mn17 octahedral unit
Moushi, Eleni E.; Stamatatos, Theocharis C.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2009)The reaction of [Mn(O2CMe)2] · 4H2O with pdH2 (1,3-propanediol) or mpdH2 (2-methyl-1,3-propanediol) in the presence of NaN3 in MeCN/py (py = pyridine) results in the formation of two new one-dimensional coordination polymers ...
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4-(Hydroxymethyl)pyridine and pyrimidine in manganese benzoate chemistry: Preparation and characterization of hexanuclear clusters featuring the { Mn4II Mn2III ( μ4 - O )2 }10 + core
Stamatatos, Theocharis C.; Foguet-Albiol, D.; Perlepes, Spyros P.; Raptopoulou, Catherine P.; Terzis, Aris; Patrickios, Costas S.; Christou, George; Tasiopoulos, Anastasios J. (2006)The use of 4-(hydroxymethyl)pyridine (4hmpH) and pyrimidine (pym) in manganese benzoate chemistry has been investigated. The reactions of 4hmpH and pym with Mn(O2CPh)2 · 2H2O in MeCN affords the complexes [Mn6O2(O2CPh)10(4hmpH) ...
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Approaches to molecular magnetic materials from the use of cyanate groups in higher oxidation state metal cluster chemistry: Mn14 and Mn 16
Alexandropoulos, Dimitris I.; Papatriantafyllopoulou, Constantina; Li, C. -L; Cunha-Silva, L.; Manos, Manolis J.; Tasiopoulos, Anastasios J.; Wernsdorfer, W.; Christou, George; Stamatatos, Theocharis C. (2013)The initial employment of cyanato groups in higher oxidation state manganese cluster chemistry, in conjunction with the gem-diolate form of di-2-pyridylketone or 2,6-diacetylpyridine dioxime chelate ligands, has afforded ...
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ChemInform Abstract: Filling the Gap Between the Quantum and Classical Worlds of Nanoscale Magnetism: Giant Molecular Aggregates Based on Paramagnetic 3d Metal Ions
Papatriantafyllopoulou, Constantina; Moushi, Eleni E.; Christou, George; Tasiopoulos, Anastasios J. (2016)
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Cyanate groups in higher oxidation state metal cluster chemistry: Mixed-valence (II/III) Mn16 and Mn18 clusters
Alexandropoulos, Dimitris I.; Moushi, Eleni E.; Papatriantafyllopoulou, Constantina; Beavers, Christine M.; Teat, Simon J.; Tasiopoulos, Anastasios J.; Christou, George; Stamatatos, Theocharis C. (2016)
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Cyanate groups in higher oxidation state metal cluster chemistry: Mixed-valence (II/III) Mn16 and Mn18 clusters
Alexandropoulos, Dimitris I.; Moushi, Eleni E.; Papatriantafyllopoulou, Constantina; Beavers, Christine M.; Teat, S. J.; Tasiopoulos, Anastasios J.; Christou, George; Stamatatos, Theocharis C. (2016)The employment of cyanato (OCN-) group in high oxidation state manganese cluster chemistry, in conjunction with carboxylate ions and the organic chelating/bridging ligand 2-(hydroxymethyl)pyridine (hmpH), is reported. The ...
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Discrete and encapsulated molecular grids: Homometallic Mn15 and heterometallic Mn24Ni2 aggregates
Charalambous, Maria; Zartilas, Sotiris M.; Moushi, Eleni E.; Papatriantafyllopoulou, Constantina; Manos, Manolis J.; Stamatatos, Theocharis C.; Mukherjee, S.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2014)Two molecular grid-like clusters are reported, one is a discrete [3 × 5] grid and the other a [3 × 4] grid within a Mn12Ni 2 loop. Both Mn24Ni2 and Mn15 aggregates display novel and aesthetically pleasing structures with ...
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Employment of methyl 2-pyridyl ketone oxime in manganese non-carboxylate chemistry: MnII2MnIV and MnII 2MnIII6 complexes
Stoumpos, Constantinos C.; Stamatatos, Theocharis C.; Sartzi, H.; Roubeau, O.; Tasiopoulos, Anastasios J.; Nastopoulos, Vassilios; Teat, S. J.; Christou, George; Perlepes, Spyros P. (2009)The employment of the anion of methyl 2-pyridyl ketone oxime (mpko -) as a tridentate chelating/bridging ligand in manganese chemistry is described. The inorganic anion (Br-, ClO4-) used in the reaction affects the identity ...
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A family of 3D coordination polymers composed of Mn19 magnetic units
Moushi, Eleni E.; Stamatatos, Theocharis C.; Wernsdorfer, W.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2006)(Figure Presented) Singles networks: The use of 1,3-propanediol and of 2-methyl-1,3-propanediol in manganese carboxylate chemistry leads to two new 3D coordination polymers with an unprecedented Mn19 repeating unit. The ...
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Field-sweep-rate dependence of the coercive field of single-molecule magnets: A classical approach with applications to the quantum regime
Wernsdorfer, W.; Murugesu, M.; Tasiopoulos, Anastasios J.; Christou, George (2005)A method, based on the Néel-Brown model of thermally activated magnetization reversal of a magnetic single-domain particle, is proposed to study the field-sweep-rate dependence of the coercive field of single-molecule ...
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Filling the gap between the quantum and classical worlds of nanoscale magnetism: Giant molecular aggregates based on paramagnetic 3d metal ions
Papatriantafyllopoulou, Constantina; Moushi, Eleni E.; Christou, George; Tasiopoulos, Anastasios J. (2016)In this review, aspects of the syntheses, structures and magnetic properties of giant 3d and 3d/4f paramagnetic metal clusters in moderate oxidation states are discussed. The term "giant clusters" is used herein to denote ...
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Filling the gap between the quantum and classical worlds of nanoscale magnetism: giant molecular aggregates based on paramagnetic 3d metal ions[ONLINE]
Papatriantafyllopoulou, Constantina; Moushi, Eleni E.; Christou, George; Tasiopoulos, Anastasios J. (2016)
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Giant Heterometallic [Mn36Ni4]0/2− and [Mn32Co8] “Loops-of-Loops-and-Supertetrahedra” Molecular Aggregates
Charalambous, Maria; Moushi, Eleni E.; Nguyen, Tu N.; Papatriantafyllopoulou, Constantina; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2019)We report the synthesis, crystal structures and magnetic properties of the giant heterometallic [Mn36Ni4]2-/0 (compounds 1, 2) / [Mn32Co8] (compound 3) ‘loops-of-loops-and-supertetrahedra’ molecular aggregates and of a ...
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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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Heterometallic MnIII4Ln2 (Ln = Dy, Gd, Tb) Cross-Shaped Clusters and Their Homometallic MnIII4MnII2 Analogues
Savva, Maria; Skordi, Katerina; Fournet, A. D.; Thuijs, A. E.; Christou, George; Perlepes, Spyros P.; Papatriantafyllopoulou, Constantina; Tasiopoulos, Anastasios J. (2017)The employment of di-2-pyridyl ketone, (py)2CO, in heterometallic Mn/4f and homometallic Mn cluster chemistry has yielded six MnIII4Ln2 and two MnIII4MnII2 structurally related clusters, namely, [Mn4Ln2O2{(py)2CO2}4(NO3) ...
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High nuclearity single-molecule magnets: A mixed-valence Mn26 cluster containing the di-2-pyridylketone diolate dianion
Stamatatos, Theocharis C.; Nastopoulos, Vassilios; Tasiopoulos, Anastasios J.; Moushi, Eleni E.; Wernsdorfer, W.; Christou, George; Perlepes, Spyros P. (2008)The employment of the dianion (dpkd2-) of the gem-diol form of di-2-pyridylketone (dpk) as a tetradentate chelate in manganese chemistry is reported, and the synthesis, crystal structure, and magnetochemical characterization ...
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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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Homometallic {Mn10} and heterometallic {Mn6Ca4} supertetrahedra exhibiting an unprecedented {MnIII9MnII} oxidation state level and heterometal ions distribution
Skordi, Katerina; Papatriantafyllopoulou, Constantina; Zartilas, Sotiris; Poole, Katye M.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2018)Two novel decametallic clusters displaying a supertetrahedral structural core are discussed, a homometallic compound [MnIII9MnII(μ4-O)4(μ3-OMe)3(btH)3(ed)3(PhCO2)6]·6Η2Ο (1·6Η2Ο) (btH3 = (±)-1,2,4-butanetriol
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Inducing single-molecule magnetism in a family of loop-of-loops aggregates: Heterometallic Mn40Na4 clusters and the homometallic Mn44 analogue
Moushi, Eleni E.; Lampropoulos, Christos; Wernsdorfer, W.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2010)The syntheses, crystal structures, and magnetic properties of a new family of heterometallic Mn40Na4 and homometallic Mn44 loop-of-loops aggregates are reported. The reactions of [Mn3O(O 2CMe)6(py)3]•py with 1,3-propanediol ...
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Introducing Dimensionality to the Archetypical Mn12 Single-Molecule Magnet: A Family of [Mn12]n Chains
Corrales, S. A.; Cain, J. M.; Uhlig, K. A.; Mowson, A. M.; Papatriantafyllopoulou, Constantina; Peprah, M. K.; Ozarowski, A.; Tasiopoulos, Anastasios J.; Christou, George; Meisel, M. W.; Lampropoulos, Christos (2016)The [Mn12O12(O2CR)16(L4)] family (R = various