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.

Lability of tertiary phosphine groups of tertiary phosphidomethyl derivatives of tungsten

Abstract: The rate of the thermal rearrangement of the compounds [W(η-C5H5)2H(CH2PR3)]PF6 to [W(η-C5H5)2Me(PR3)]PF6 increases in the order R3= Ph2Me>PhMe2>Me3, and when R3= Me3 the two compounds are found to be in equilibrium in solution; when R3= Ph2Me the PMePh2 group exchanges with added PMe3 giving [W(η-C5H5)2H(CH2PMe3)]PF6.

Organo‐molybdenum and ‐tungsten chemistry concerning hydrocarbon catalysis*

Abstract: It is nearly always very difficult to elucidate the intimate mechanism of hydrocarbon reactions catalyzed by transition metals, by direct study of the catalyst system. This is especially true for heterogeneous catalysts. However, it is a reasonable assumption that the nature of any transition metal intermediates in a complex catalytic cycle will find analogy with stable, isolable organo-transition metal compounds. Thus, information derived from a study of organometallic compounds and their reactions can assist the development of ideas about possible mechanisms for the catalytic reactions. In this paper we describe first the synthesis and some reactions of bis-qcyclopentadienyl compounds of molybdenum and tungsten under the following headings: 1. The insertion of tungsten and molybdenum into aromatic and aliphatic C-H bonds; 2. The synthesis and reactions of molybdenaand tungstena-cyclobutane compounds; 3. Evidence for a 1.2-hydrogen shift mechanism in some tungsten-alkyl compounds. We will then suggest how these observations may be relevant to the mechanisms of olefin metathesis, Ziegler-Natta catalysis, and related reactions.

η-Arene and η-cyclohexadiene tungsten chemistry: new synthetic routes to tertiary phosphine–hydride derivatives

Abstract: Convenient syntheses of W(η-C6H8)(PMe3)3H2 and W(η-C6H6)(PMe3)2H2 are described; these compounds, together with W(η-C6H6)(η-C6H8)H2, W(η-PhMe)(PMe3)2H2, W(η-PhMe)(Me2PCH2CH2PMe2)H2, and W(η-C6H6)(PMe3)3 have been synthesized using either tungsten atoms or by the reductive labilization of η-PhMe ring of W(η-PhMe)2 using potassium metal.

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