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.

Stable methylnickel complexes containing tertiary phosphine ligands

Abstract: The preparation and properties of the complexes trans-NiMeX(PPri3)2(I), where X = Cl, Br, or l, and NiMe2(Ph2P·CH2·CH2·PPh2)(II) are described. The complexes (I) react with triphenylphosphine to give the complexes NiX(PPh3)3, X = Cl, Br, or l, and NiMel(PPri3)2 reacts with methyl iodide to give [PPri3Me][Nil3PPri3]. Complex (II) reacts with phenol to give the phenoxy-derivative Ni(Ph2P·CH2·CH2·PPh2)Me(OPh).

The Covalent Bond Classification Method and Its Application to Compounds That Feature 3-Center 2-Electron Bonds

Abstract: This article provides a means to classify and represent compounds that feature 3-center 2-electron (3c–2e) interactions according to whether (1) the two electrons are provided by one or by two atoms; (2) the central bridging atom provides two, one, or zero electrons; and (3) the interaction is open or closed. Class I 3c–2e bonds are defined as those in which two atoms each contribute one electron to the 3-center orbital, while Class II 3c–2e bonds are defined as systems in which the pair of electrons are provided by a single atom. The use of appropriate structure-bonding representations enables the [ML l X x Z z ] covalent bond classification of the element of interest to be evaluated. This approach is of considerable benefit in predicting metal–metal bond orders that are in accord with theory for dimetallic compounds that feature bridging hydride and carbonyl ligands.

Trimethylphosphine as a reactive solvent: synthesis and crystal structure of Ta(PMe3)3(η2-CH2–PMe2)(η2-CH–PMe2) and synthesis of related molybdenum and tungsten compounds

Abstract: Reduction of solutions of the metal halides TaCl5, MoCl5, or WCl6 in pure trimethylphosphine with sodium sand causes smooth stepwise reduction giving Ta(PMe3)3(η2-CH2–PMe2)(η2-CH–PMe2), Mo(PMe3)5H2, or W(PMe3)4(η2-CH2–PMe2)H respectively; the X-ray crystal structure of the tantalum compound shows the presence of the unique Ta(η2-CH–PMe2) group.

Diene and arene compounds of zirconium and hafnium

Abstract: The diene compounds [Hf(η4-CH2CMeCMeCH2)(PMe3)2Cl2]1, [M(η4-C6H8)(PMe3)2Cl2](M = Zr 2 or Hf 3) and the divalent [Zr(η6-C6H5Me)(PMe3)2Cl2]5 have been prepared. The structure of compound 1 has been determined by low-temperature neutron diffraction (15 K) and the σ2, π nature of the bonding mode of the 2,3-dimethylbutadiene ligand demonstrated from the methylene hydrogen positions. Treatment of 1 with lithium indenide gave [Hf(η5-C9H7)2(η4-CH2CMeCMeCH2)]4. The crystal structure of 5 has been determined by X-ray diffraction.

Arene–tungsten chemistry: bis(arene)tungsten hydride derivatives; co-condensation of tungsten atoms from an electron gun source with aromatic hydrocarbons

Abstract: Co-condensation of tungsten atoms from an electron gun source with benzene, toluene, or mesitylene yields bis-(arene)tungsten compounds [(η-C6H3R3)2W](R = H and/or Me) which are reversibly protonated by dilute acids to give the cations [(η-C6H3R3)2WH]+(R = H and/or Me).

Single-shell carbon nanotubes of 1-nm diameter

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.

Chemistry and properties of nanocrystals of different shapes.

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

Carbon Nanotubes: Present and Future Commercial Applications

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.

Nanoparticle therapeutics: an emerging treatment modality for cancer

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.

Chemistry of Carbon Nanotubes

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