Fullerene Complexes (fullerene + complex)

Distribution by Scientific Domains


Selected Abstracts


Di- and Trinuclear [70]Fullerene Complexes: Syntheses and Metal,Metal Electronic Interactions,

ANGEWANDTE CHEMIE, Issue 34 2009
Yutaka Matsuo Prof.
Buckyballs mit Spikes: [70]Fulleren wurde in die Zwei- und Dreikernkomplexe [M2(C70Ar6)Cp2], [M2(C70Ar7H)Cp2] und [M3(C70Ar7)Cp3] überführt (M=Fe, Ru; Ar=Aryl; Cp=C5H5; siehe Bild: M,violett, C,rosa, blau, grau), in denen die Metallatome über das ,-konjugierte System des Fullerens elektronisch wechselwirken. Die Komplexe sollten sich wegen ihrer Strukturen und elektrochemischen Eigenschaften für den Einsatz in der molekularen Elektronik eignen. [source]


Hoop-Shaped Condensed Aromatic Systems: Synthesis and Structure of Iron, and Ruthenium,Hepta(organo)[60]fullerene Complexes

CHEMISTRY - AN ASIAN JOURNAL, Issue 8 2007
Yutaka Matsuo Dr.
Abstract Potassium reduction of iron, and ruthenium,penta(organo)[60]fullerene complexes, [M(,5 -C60R5)(,5 -Cp)] (1,a: M=Fe, R=Ph; 1,b: M=Fe, R=Me; 1,c: M=Ru, R=Ph; 1,d: M=Ru, R=Me; Cp=C5H5) gave mono- and dianions of these complexes. Treatment of the dianion 1,a with ,-bromodiphenylmethane gave three different iron,hepta(organo)[60]fullerenes, [Fe{,5 -C60Ph5(CHPh2)2}(,5 -Cp)], as a mixture of regioisomers. All three compounds were fully characterized by physical methods, including X-ray crystallography and electrochemical measurements. One of the three compounds contains a new hoop-shaped condensed aromatic system. [source]


Novel organometallic fullerene complexes for vehicular hydrogen storage

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2007
A. C. Dillon
Abstract Theoretical studies have predicted that scandium can bind to the twelve five-membered rings in C60. It is then possible to stabilize four dihydrogen ligands (H2) on each Sc atom with a binding energy of ,30 kJ/mol, ideal for vehicular hydrogen storage. The resulting C60[ScH2(H2)4]12 complex is predicted to be a minimum energy structure with ,7.0 wt% reversible hydrogen capacity. However, wet chemical synthesis of the calculated ,5 -coordinated fullerene complex is unprecedented. The chemistry of C60 is generally olefinic (i.e., ,2 -coordination, in which the metal is coordinated to two carbon atoms contributing two electrons to the bonding). Furthermore, stabilization of multiple dihydrogen ligands on a single transition metal has not been demonstrated. Recently we have probed new synthesis techniques in order to coordinate C60 with either Fe, Sc, Cr, Co or Li. The new compounds were characterized with solid-state nuclear magnetic resonance, and structures have been proposed. All of the structures were found to have unique binding sites for hydrogen employing the technique of temperature programmed desorption. Furthermore, some of the structures were shown to have significant hydrogen capacities with volumetric measurements. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]


Synthesis, Characterization, and Electrochemical Properties of Novel Transition Metal,Fullerene Complexes Containing Di- and Tetraphosphane Ligands

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 2 2006
Li-Cheng Song
Abstract This paper reports the synthesis, characterization, and some properties of transition metal,fullerene complexes containing trans -1,1,-bis(diphenylphosphanyl)ethylene (dppet, trans -Ph2PCH=CHPPh2) and N,N,N,,N,-tetra(diphenylphosphanylmethyl)ethylene diamine (dppeda, [(Ph2PCH2)2NCH2]2), including [(,2 -C60M)(dppet)2] (M = Pt 1, Pd 2), [(,2 -C60M)(dppet)]2 (M = Pt 3, Pd 4), [(,2 -C60Pd)(,2 -C60Pt)(dppet)2](5), [(,2 -C60Pd)(,2 -C70Pd)(dppet)2] (6), [(,2 -C70Pd)(dppet)]2 (7), [(,2 -C60M)(dppeda)] (M = Pt 8, Pd 9), and [(,2 -C60M)2(dppeda)] (M = Pt 10, Pd 11). Interestingly, while complexes 1, 2, 8, and 9 are the first examples of metallacyclopropafullerene diphosphane ligands containing fullerene cores, complexes 3,7, 10, and 11 are the first group 10 metal-containing, dumbbell-shaped bisfullerenes. All the complexes 1,11 were characterized by elemental analysis, spectroscopy, and, particularly for 4 and 5, by X-ray crystallography and cyclic voltammetry. Pathways for the formation of 1,11 are suggested. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006) [source]


Novel organometallic fullerene complexes for vehicular hydrogen storage

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2007
A. C. Dillon
Abstract Theoretical studies have predicted that scandium can bind to the twelve five-membered rings in C60. It is then possible to stabilize four dihydrogen ligands (H2) on each Sc atom with a binding energy of ,30 kJ/mol, ideal for vehicular hydrogen storage. The resulting C60[ScH2(H2)4]12 complex is predicted to be a minimum energy structure with ,7.0 wt% reversible hydrogen capacity. However, wet chemical synthesis of the calculated ,5 -coordinated fullerene complex is unprecedented. The chemistry of C60 is generally olefinic (i.e., ,2 -coordination, in which the metal is coordinated to two carbon atoms contributing two electrons to the bonding). Furthermore, stabilization of multiple dihydrogen ligands on a single transition metal has not been demonstrated. Recently we have probed new synthesis techniques in order to coordinate C60 with either Fe, Sc, Cr, Co or Li. The new compounds were characterized with solid-state nuclear magnetic resonance, and structures have been proposed. All of the structures were found to have unique binding sites for hydrogen employing the technique of temperature programmed desorption. Furthermore, some of the structures were shown to have significant hydrogen capacities with volumetric measurements. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]


Hoop-Shaped Condensed Aromatic Systems: Synthesis and Structure of Iron, and Ruthenium,Hepta(organo)[60]fullerene Complexes

CHEMISTRY - AN ASIAN JOURNAL, Issue 8 2007
Yutaka Matsuo Dr.
Abstract Potassium reduction of iron, and ruthenium,penta(organo)[60]fullerene complexes, [M(,5 -C60R5)(,5 -Cp)] (1,a: M=Fe, R=Ph; 1,b: M=Fe, R=Me; 1,c: M=Ru, R=Ph; 1,d: M=Ru, R=Me; Cp=C5H5) gave mono- and dianions of these complexes. Treatment of the dianion 1,a with ,-bromodiphenylmethane gave three different iron,hepta(organo)[60]fullerenes, [Fe{,5 -C60Ph5(CHPh2)2}(,5 -Cp)], as a mixture of regioisomers. All three compounds were fully characterized by physical methods, including X-ray crystallography and electrochemical measurements. One of the three compounds contains a new hoop-shaped condensed aromatic system. [source]