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Malcolm L. H. Green

Bio: Malcolm L. H. Green is an academic researcher from University of Oxford. The author has contributed to research in topics: Carbon nanotube & Cyclopentadienyl complex. The author has an hindex of 82, co-authored 800 publications receiving 31121 citations. Previous affiliations of Malcolm L. H. Green include Gas Technology Institute & University of Illinois at Urbana–Champaign.


Papers
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Journal ArticleDOI
TL;DR: The compound [W(C7H7)(η-C9H7) was formed in gram quantities by reduction of WCl6 with sodium amalgam in the presence of cycloheptatriene.
Abstract: The compound [W(η-C7H7)(η-C7H9)]1 is formed in gram quantities by reduction of WCl6 with sodium amalgam in the presence of cycloheptatriene. The compound 1 with iodine in acetonitrile gives [W(η-C7H7)(MeCN)I2]2 and this reacts with PMe3 forming [W(η-C7H7)(PMe3)I2]. Oxidation of 1 with bromine in acetonitrile yields [W(η-C7H7)(MeCN)Br2] and with bromine in tetrahydrofuran followed by addition of PMe3 gives [W(η-C7H7)(PMe3)Br2]. Reduction of 2 with sodium amalgam in the presence of 1,2-bis(dimethylphosphino)ethane (dmpe) affords [W(η-C7H7)(dmpe)I]. Compound 2 also reacts with Na(C5H4R)(R = H or Me) and lithium indenide to give the mixed-sandwich compounds [W(η-C7H7)(η-C5H4R)](R = H or Me) and [W(η-C7H7)(η-C9H7)] respectively. The sandwich compounds [M(η-C7H7)(η-C5H4Me)](M = Mo or W) and ZrS2 form the intercalates {ZrS2[M(η-C7H7)(η-C5H4Me)]x}.

8 citations

Journal ArticleDOI
TL;DR: In this article, an asymmetric structure for the latter was suggested by 1H n.m. spectra at 270 MHz and double-resonance experiments, and the cations [(C6H6R′)Mo(π-C3H5)L2′]+, (R′= H or Me, L2′= en, bipy, and o-phenylenediamine) are also described.
Abstract: The dimer [C6H6Mo(π-C3H6)Cl]2 is cleaved by chelate ligands L2 giving the cations [C6H6Mo(π-C3H5)L2]+[L2= Ph2PCH2CH2PPh2(dppe), Me2PCH2CH2PMe2(dmpe), or (MeSCH2)2]. The cations react with nucleophiles (R–= H–, Bun, and, when L2= dppe, CN–) giving the neutral cyclohexadienyl derivatives [(C6H6R)Mo(π-C3H5)L2]. An asymmetric structure for the latter is suggested by 1H n.m.r. spectra at 270 MHz and double-resonance experiments. The cations [(C6H6R′)Mo(π-C3H5)L2′]+, (R′= H or Me, L2′= en, bipy, and o-phenylenediamine) are also described.

8 citations

Journal ArticleDOI
TL;DR: The new compounds have been prepared and characterised The new compounds as mentioned in this paper, which indicate the crystal structure has been determined and characterisation of the crystal structures has been carried out and the new compounds will be prepared and characterized.
Abstract: The new compounds [Mo(η-Me 3 SiC 5 H 4 )(NMe 2 ) 3 ] , [Mo(η-Me 3 SiC 5 H 4 ) 2 H 2 ], [Mo(η-C 9 H 7 )(NMe 2 ) 3 ], [Mo(η-C 5 H 5 )(S 2 CNMe 2 ) 3 ], [Mo(η-C 5 H 5 )(OPr i )(NMe 2 ) 2 ], [Mo(η-C 5 H 5 )(OPr i ) 2 (NMe 2 )], [Mo(η-C 5 H 5 )(OBu t )(NMe 2 ) 2 ], [Mo(η-C 5 H 5 )(OBu t ) 2 (NMe 2 )], [Mo(η-C 5 H 5 )(OC 6 H 2 Me-4- Bu t 2 -2,6)(NMe 2 ) 2 ], [Mo(η-C 5 H 5 )(OC 6 H 3 Me-6- Bu t -2)(NMe 2 ) 2 ], [Mo(η-C 5 H 5 )(OC 6 H 4 Bu t -p)(NMe 2 ) 2 ], [Mo(OR) 4 (HNMe 2 ) 2 ] (R = p-MeC 6 H 4 * or p-Bu t C 6 H 4 ) and [Mo(OC 6 H 4 Me-p) 4 (NMe 2 ) 2 ]* have been prepared and characterised The asterisk indicates the crystal structure has been determined

8 citations

Journal ArticleDOI
TL;DR: The syntheses and properties of the new η-arenetungsten compounds W(η-C6H5Me) andBF4 are described.
Abstract: The syntheses and properties of the new η-arenetungsten compounds [{W(η-C6H5Me)(η-C3H5)Cl}2], [W(η-C6H5Me)(η-C3H5)(OCOMe)], [W(η-C6H5Me)(η-C3H5)(OCOPh)], [W(η-C6H5Me)(η-C3H5)(PPhMe2)Cl], [W(η-C6H5Me)(η-C3H5)(PR2CH2CH2PR2)]PF6(R = Me or Ph), [W(η-C6H5Me)(η-C3H5)(η-C4H6)]PF6, [W(η-C6H5Me)(η-C3H5)(MeCN)2]PF6, [W(η-C6H5Me)(PMe3)2Cl2H]PF6, [W(η-C6H5Me)(Me2PCH2CH2PMe2)H2], and [W(η-C6H5Me)(Me2PCH2CH2PMe2)H3]BF4 are described.

7 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used temperature programmed reaction (TPRe) method with different hydrocarbon sources, and their catalytic activities were tested using pyridine HDN as a model reaction.
Abstract: Molybdenum carbides, bimetallic carbides and supported molybdenum carbides were prepared using the temperature programmed reaction (TPRe) method with different hydrocarbon sources, and their catalytic activities were tested using pyridine HDN as a model reaction. The carbon source used for the carbide synthesis has a large effect on the dispersion, activity and lifetime of the carbide catalysts, while the activity of supported molybdenum carbides is lower than the bulk materials. The addition of a second metal, such as Ni or Co, also has a significant effect on the structural and catalytic properties of the final molybdenum carbides; cobalt doped molybdenum carbide has the longest lifetime and highest activity.

7 citations


Cited by
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Journal ArticleDOI
Sumio Iijima1, Toshinari Ichihashi1
17 Jun 1993-Nature
TL;DR: In this article, the authors reported the synthesis of abundant single-shell tubes with diameters of about one nanometre, whereas the multi-shell nanotubes are formed on the carbon cathode.
Abstract: CARBON nanotubes1 are expected to have a wide variety of interesting properties. Capillarity in open tubes has already been demonstrated2–5, while predictions regarding their electronic structure6–8 and mechanical strength9 remain to be tested. To examine the properties of these structures, one needs tubes with well defined morphologies, length, thickness and a number of concentric shells; but the normal carbon-arc synthesis10,11 yields a range of tube types. In particular, most calculations have been concerned with single-shell tubes, whereas the carbon-arc synthesis produces almost entirely multi-shell tubes. Here we report the synthesis of abundant single-shell tubes with diameters of about one nanometre. Whereas the multi-shell nanotubes are formed on the carbon cathode, these single-shell tubes grow in the gas phase. Electron diffraction from a single tube allows us to confirm the helical arrangement of carbon hexagons deduced previously for multi-shell tubes1.

8,018 citations

Journal ArticleDOI
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
Abstract: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties * To whom correspondence should be addressed. Phone, 404-8940292; fax, 404-894-0294; e-mail, mostafa.el-sayed@ chemistry.gatech.edu. † Case Western Reserve UniversitysMillis 2258. ‡ Phone, 216-368-5918; fax, 216-368-3006; e-mail, burda@case.edu. § Georgia Institute of Technology. 1025 Chem. Rev. 2005, 105, 1025−1102

6,852 citations

Journal ArticleDOI
01 Feb 2013-Science
TL;DR: Although not yet providing compelling mechanical strength or electrical or thermal conductivities for many applications, CNT yarns and sheets already have promising performance for applications including supercapacitors, actuators, and lightweight electromagnetic shields.
Abstract: Worldwide commercial interest in carbon nanotubes (CNTs) is reflected in a production capacity that presently exceeds several thousand tons per year. Currently, bulk CNT powders are incorporated in diverse commercial products ranging from rechargeable batteries, automotive parts, and sporting goods to boat hulls and water filters. Advances in CNT synthesis, purification, and chemical modification are enabling integration of CNTs in thin-film electronics and large-area coatings. Although not yet providing compelling mechanical strength or electrical or thermal conductivities for many applications, CNT yarns and sheets already have promising performance for applications including supercapacitors, actuators, and lightweight electromagnetic shields.

4,596 citations

Journal ArticleDOI
TL;DR: The features of nanoparticle therapeutics that distinguish them from previous anticancer therapies are highlighted, and how these features provide the potential for therapeutic effects that are not achievable with other modalities are described.
Abstract: Nanoparticles — particles in the size range 1–100 nm — are emerging as a class of therapeutics for cancer. Early clinical results suggest that nanoparticle therapeutics can show enhanced efficacy, while simultaneously reducing side effects, owing to properties such as more targeted localization in tumours and active cellular uptake. Here, we highlight the features of nanoparticle therapeutics that distinguish them from previous anticancer therapies, and describe how these features provide the potential for therapeutic effects that are not achievable with other modalities. While large numbers of preclinical studies have been published, the emphasis here is placed on preclinical and clinical studies that are likely to affect clinical investigations and their implications for advancing the treatment of patients with cancer.

3,975 citations

Journal ArticleDOI
TL;DR: Department of Materials Science, University of Patras, Greece, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, and Dipartimento di Scienze Farmaceutiche, Universita di Trieste, Piazzale Europa 1, 34127 Triesteadays.
Abstract: Department of Materials Science, University of Patras, 26504 Rio Patras, Greece, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vass. Constantinou Avenue, 116 35 Athens, Greece, Institut de Biologie Moleculaire et Cellulaire, UPR9021 CNRS, Immunologie et Chimie Therapeutiques, 67084 Strasbourg, France, and Dipartimento di Scienze Farmaceutiche, Universita di Trieste, Piazzale Europa 1, 34127 Trieste, Italy

3,886 citations