A5018014548- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Lanthanide and Transition Metal Complexes
- Metal complexes synthesis and properties
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal structures of chemical compounds
- Metal-Catalyzed Oxygenation Mechanisms
- Organometallic Complex Synthesis and Catalysis
- Chemical Synthesis and Analysis
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Chromatography
- Synthesis of Organic Compounds
- Carbohydrate Chemistry and Synthesis
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Enzyme Structure and Function
- Mechanical Engineering and Vibrations Research
- Power Systems and Technologies
- Molecular Sensors and Ion Detection
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Synthesis and characterization of novel inorganic/organometallic compounds
- Inorganic Chemistry and Materials
- Synthesis and biological activity
- Organometallic Compounds Synthesis and Characterization
University of Patras
2014-2024
University of Cyprus
2007-2010
University of Florida
2007-2010
Centre National de la Recherche Scientifique
2007-2010
Institut Néel
2007-2010
Geoanalysis (Greece)
2008
National Centre of Scientific Research "Demokritos"
2001
Istituto Pasteur
1998
University of the Basque Country
1992
European Molecular Biology Laboratory
1992
Dressed up to the nines: A nonanuclear FeII complex exhibiting rare μ4:η1 azido bridges that induce ferromagnetic exchange interactions possesses a core with very large ground-state spin (probably S=14, see picture). The combination of S value and magnetic anisotropy iron(II) centers endows this unique species superparamagnetic behavior (SMM=single-molecule magnet).
Singles networks: The use of 1,3-propanediol and 2-methyl-1,3-propanediol in manganese carboxylate chemistry leads to two new 3D coordination polymers with an unprecedented Mn19 repeating unit. have open framework structures nanometer-sized cavities (see picture; Na not visible, Mn blue, O red, C gray). units a ground spin state S=23/2 behave as single-molecule magnets.
A [Mn(III)(11)Mn(II)(6)(mu(4)-O)(8)(mu(3)-L)(4)](25+) (L = N(3)(-) or OCN(-)) octahedral unit is reported, occurring within 1D (1)(infinity) and 2D (2)(infinity) coordination polymers, as well the corresponding 0D discrete cluster 3. It possesses a giant ground-state spin value, determined in case of 3 to be S 37, second largest reported date. In addition, compound displays single-molecule magnet (SMM) behavior, thus largest-spin SMM.
The syntheses, crystal structures, and magnetic properties of a new family heterometallic Mn(40)Na(4) homometallic Mn(44) loop-of-loops aggregates are reported. reactions [Mn(3)O(O(2)CMe)(6)(py)(3)]·py with 1,3-propanediol (pdH(2)) 2-methyl-1,3-propanediol (mpdH(2)) in the presence NaN(3) afforded [Mn(10)Na(μ(3)-O)(2)(O(2)CMe)(13)(pd)(6)(py)(2)](4) (1)(4) [Mn(10)Na(μ(3)-O)(2)(O(2)CMe)(13)(mpd)(6)(py)(H(2)O)](4) (2)(4), respectively. complexes (2)(4) consist four Mn(10) loops linked through...
Complexes [Fe9(X)2-(O2CMe)8{(2-py)2CO2}4] (X(-)=OH(-) (1), N3(-) (2), and NCO(-) (3)) have been prepared by a route previously employed for the synthesis of analogous Co(9) Ni(9) complexes, involving hydroxide substitution pseudohalides (N3(-), NCO(-)). As indicated DC magnetic susceptibility measurements, this induced higher ferromagnetic couplings in complexes 2 3, leading to ground spin states compared that 1. Variable-field experiments shown state is not well isolated from excited...
Inventing the double wheel: A mixed–valent [Mn32] cluster with a very rare "double-decker" wheel topology (see its metal–oxygen core: MnIII blue, MnII pink, O red) is reported. It by far highest-nuclearity example of type, and it displays SMM behavior largest effective barrier to magnetization relaxation (Ueff≈44.5 K) for any molecular wheel. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset....
The employment of the dianion (dpkd2−) gem-diol form di-2-pyridylketone (dpk) as a tetradentate chelate in manganese chemistry is reported, and synthesis, crystal structure, magnetochemical characterization [Mn26O16(OMe)12(dpkd)12(MeOH)6](OH)6·solv (3·solv) are described. reaction Mn(ClO4)2·6H2O, dpk, NaOMe, NEt3 (2:1:4:2) MeCN/MeOH affords complex 3, which possesses rare metal topology mixed-valence (4MnII, 22MnIII). complicated [Mn26(μ4-O)10(μ3-O)6(μ3-OMe)12(μ-OR)12]18+ core 3 consists an...
A large [Mn10Na]4 loop-of-loops aggregate was prepared from the use of 1,3-propanediol (pdH2) in manganese carboxylate chemistry. It is constructed four [Mn10(mu3-O)2(O2CMe)13(pd)6(py)2]- loops linked through Na+ ions and exhibits a saddlelike topology. Magnetic characterization showed that Mn10 loop has an S approximately 4 ground-state spin displays frequency-dependent in-phase out-of-phase alternating current signals also hysteresis that, however, are not typical single-molecule magnets...
Abstract The initial use of 2‐pyridyl‐substituted oximes [(py)C(R)NOH; R = Me, Ph]/sulfate blend in nickel(II) chemistry has yielded a family hexanuclear clusters. syntheses, structures and magnetic properties are reported [Ni 6 (SO 4 ) (OH){(py)C(Me)NO} 3 {(py)C(Me)NOH} (MeOH) 2 (H O)] ( 1 ),[Ni (OH){(py)C(ph)NO} {(py)C(ph)NOH} ] )and O) ), where (py)C(Me)NOH is methyl 2‐pyridyl ketone oxime (py)C(ph)NOH phenyl oxime. molecules present the three complexes have similar which contain (μ...
The initial use of 1,3-propanediol in mixed Mn/3d cluster chemistry has led to a MnIII28MnII8NiII4 molecular aggregate which consists two MnIII8Ni2 loops and MnIII6MnII4 supertetrahedral units displays high ground spin state value ST = 26 ± 1.
The employment of the anion methyl 2-pyridyl ketone oxime (mpko−) as a tridentate chelating/bridging ligand in manganese chemistry is described. inorganic (Br−, ClO4−) used reaction affects identity product. MnBr2 and one equivalent mpkoH presence base affords [Mn3(OMe)2(mpko)4Br2] (3), which mixed-valence (2MnII, MnIV). central MnIV atom each two, crystallographically independent, centrosymmetric molecules coordinated by four oximate oxygen atoms belonging to η1:η1:η1:μ mpko− ligands, two...
The reactions of various copper(ii) sources with 2-acetylpyridine, (py)(me)CO, and 2-benzoylpyridine, (py)(ph)CO, under strongly basic conditions have been studied novel ligand transformations discovered. Reaction Cu(ClO4)2·6H2O (py)(me)CO in the presence NBu4(n)OMe (1 : 1 1) CHCl3 gave a mixture [Cu2Cl2(HLA)2](ClO4)2 (1) [Cu2Cl2(LB)2(ClO4)2] (2), where HLA is 3-hydroxy-1,3-di(pyridin-2-yl)-butane-1-one LB zwitterionic-type 3-hydroxy-1-methyl-3-(pyridin-2-yl)-3H-indolizin-4-ium. formed...
Two new Mn15 clusters consisting of a supertetrahedron which is incorporated in loop are reported. The reactions [Mn(O2CEt)2]·2H2O with the diols 1,3-propanediol (H2pd) or 2-methyl-1,3-propanediol (H2mpd) presence KX (X = CN−, Cl−, Br−, NO3−, ClO4−, OCN−, SCN−) afforded compounds [Mn15K(μ4-O)4(O2CEt)11(pd)12(py)2] (1) and [Mn15K(μ4-O)4(O2CEt)11(mpd)12(py)2] (2). structural core 1 2 consists Mn11 Mn9K sharing Mn5 triangle. To best our knowledge, motif appears for first time metal cluster...
Aufgetakelt: Einen Grundzustand mit sehr hohem Spin (vermutlich S=14) haben die ferromagnetischen Austauschwechselwirkungen zur Folge, ungewöhnlichen μ4:η1-Azidobrücken in einem neunkernigen FeII-Komplex (siehe Bild) induzieren. Die Kombination aus S-Wert und magnetischer Anisotropie der Eisen(II)-Zentren verleiht dieser einzigartigen Verbindung superparamagnetisches Verhalten. SMM=Einzelmolekülmagnet. Supporting information for this article is available on the WWW under...
Das Doppelrad erfunden: Ein gemischtvalenter [Mn32]-Cluster mit einer seltenen „Doppeldecker“-Radtopologie (siehe seinen Metall-Sauerstoff-Kern: MnIII blau, MnII pink, O rot) wurde entwickelt. Der Cluster ist bei weitem das kernreichste Beispiel seiner Art und zeigt einzelmolekülmagnetisches Verhalten der höchsten effektiven Barriere für die Magnetisierungsrelaxation (Ueff≈44.5 K) aller bekannten molekularen Räder. Detailed facts of importance to specialist readers are published as...
The use of the anion 3-methyl-1,3,5-pentanetriol (mpt(3-)) in manganese carboxylate chemistry has afforded new Mn(II/III)12 cluster [Mn(II)6Mn(III)6(mpt)6(CH3CO2)12(py)6]·3CH3CN (1·3CH3CN). Complex 1 was isolated moderate yield by reaction Mn(CH3CO2)2·4H2O and H3mpt a 2.6:1 molar ratio solvent mixture acetonitrile pyridine. structure consists alternating [Mn(II)2(CH3CO2)3(py)](+) [Mn(III)2(μ-OR)2(CH3CO2)(py)](3+) dimeric units (three each dimer), linked at end two alkoxo one acetate bridges;...
The initial use of ligands 2′-hydroxyacetophenone (HL1), 2-hydroxybenzophenone (HL2) and 2,2′-dihydroxybenzophenone (H2L3) in iron(III) chemistry is described. syntheses crystal structures are reported for five clusters: [Fe10O4(OMe)14(L1)6(MeOH)2](NO3)2·3MeOH (1·3MeOH), [Fe12O4(OH)(OMe)17(L1)8](ClO4)2·2H2O (2·2H2O), [Fe10O4(OMe)14Cl4(L2)4(MeOH)2] (3), [Fe10O4(OMe)14(L2)6(py)2](ClO4)2·MeOH (4·MeOH), where py = pyridine, [Fe6O2(OEt)6(O2CMe)2(L3)2(HL3)2] (5). molecular the decanuclear clusters...