Reactions of Transition Metal Complexes with Fullerenes (C<sub>60</sub>, C<sub>70</sub>, etc.) and Related Materials

Balch, Alan L.; Olmstead, Marilyn M.

doi:10.1021/cr960040e

Cited by 494 publications

(368 citation statements)

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“…In the process of optimising the arrangement geometry the palladium atom takes the central position above the double fullerene bonding. The fullerene molecule is slightly deformed in this process which takes the form of clear elongation of this double C=C bond from 138 pm to about 150 pm and the resulting weakening, which was also observed in Pd-fullerene complexes presented in [18,19]. The symmetry break can lead to a decrease in the full symmetrical mode intensity.…”

Section: Discussionmentioning

confidence: 71%

“…The spectrum is dominated by intense bands deriving from fully symmetrical Ag (1) In PVD samples, palladium atoms can be found not only in nanocrystalline clusters but they can also be observed being embedded in the immediate surroundings of fullerene molecules. A review of literature data shows the possibility of the existence of direct Pd-C 60 bonds in the fullerene framework [18,19]. This is a result of the alkene character of the C 60 molecule which makes it a potential ligand of olefin type in metal-ligand complexes.…”

Section: Discussionmentioning

confidence: 99%

“…Metal atoms are usually coordinated in the C-C double bond (6 -6 bond) located between two hexagons on the surface of the C 60 molecule. Some of [(PR 3 ) 2 Pd (η 2 -C 60 ) complexes (where R = H, ethylene or phenyl group) were synthesised and theoretically and experimentally analysed and presented in the literature [18][19][20][21]. In addition, organometal polymers with a transition element Pd C 60 , by reaction of fullerene C 60 with a dibenzylideneacetone (DBA) complex of Pd, were prepared as well [22,23].…”

Section: Discussionmentioning

confidence: 99%

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Raman studies of Pd-C nanocomposites

et al. 2013

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Abstract:The results of studying palladium-carbon (Pd-C) nanocomposites using Raman spectroscopy are presented. This method has been used for studying samples having various palladium content, prepared by a one-step Physical Vapour Deposition (PVD) process and a Chemical Vapour Deposition (two-step PVD/CVD) process using different process parameters. For samples obtained by PVD, the vibration bands characteristic of C 60 fullerene molecules were observed in the spectra, whereas for layers obtained by PVD/CVD, the Raman spectra displayed mainly D and G bands characteristic solely of the prescence of graphite-like layers' vibrations. The analysis of the obtained Raman spectra reveals that its shape is affected by many parameters including type of substrate, temperature, and the percentage content of Pd in the studied layer. The quantitative analysis of spectra for layers obtained using the PVD/CVD process shows a difference in the relative intensity of bands D and G, reflecting the different degrees of amorphisation in the investigated nanocomposites. PACS

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Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Raman studies of Pd-C nanocomposites

et al. 2013

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“…[35][36][37][38][39] The earliest investigations concentrated on understanding the novel bonding, investigating the redox properties, and exploring the scope of the structural motif, particularly by involving a variety of metals. 40 Somewhat later, an extensive organic functionalization chemistry developed. [41][42][43][44] Both chromophores have been tagged to polymers, surfaces, electrodes, etc., and applied to problems from material science 45 to biochemistry.…”

Section: Introduction Scope and Nomenclaturementioning

confidence: 99%

Discrete Fulleride Anions and Fullerenium Cations

2000

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His research interests include reactive cation and superacid chemistry with inert carborane counterions, ionic liquids, bioinorganic chemistry, spin-coupling phenomena, fullerene chemistry, and new carbon-or porphyrin-based materials. He is a Sloan Fellow, a Dreyfus Teacher−Scholar Awardee, and a Guggenheim Fellow. Robert Bolskar received his B.S. degree in Chemistry from Carroll College in Waukesha, WI, in 1992. He earned his Ph.D. degree at the University of Southern California in Los Angeles under the direction of Christopher Reed in 1997, investigating the synthetic redox chemistry of fullerene anions and cations. In 1998 he moved to the University of California, Riverside, as Managing Research Associate. He is currently Senior Chemist at TDA Research in Wheat Ridge, CO. His research interests include the chemistry and physics of fullerene compounds, supramolecular chemistry, strongly oxidizing systems, and electrophilic cations.

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“…carbon nanotube ͉ metal nanoparticle ͉ self-assembly ͉ metal deposition A s has been amply demonstrated in chemistry by way of metal-catalysis, metal-complexation should immensely widen the scope of carbon cluster science (1)(2)(3)(4)(5). Thus, metalcontaining hollow carbon clusters, such as endohedral metallofullerenes (6,7) and carbon nanotube (NT) filled with metal atoms (3,4,(8)(9)(10)(11)(12), have been suggested as promising materials.…”

mentioning

confidence: 99%

Selective deposition of a gadolinium(III) cluster in a hole opening of single-wall carbon nanohorn

Hashimoto

Yorimitsu

Ajima

et al. 2004

Proc. Natl. Acad. Sci. U.S.A.

104

105

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Selective synthesis of particles of angstrom to nanometer size consisting of one to many metal atoms is instrumental in various applications, but it has been hampered by the tendency of the metal atom to form large clusters. We found, as studied by the state-of-the-art electron microscopic technique, a strategy to produce metal-containing nanoparticles isolated from each other by depositing metal atoms in a hydrophilic hole on or in the interior of a carbon nanotube as demonstrated by the reaction of Gd(OAc) 3 with oxidized single-wall nanohorns. Besides the potential utilities of the deposited metal clusters, the metal deposition protocol provides a method to control permeation of molecules through such openings.carbon nanotube ͉ metal nanoparticle ͉ self-assembly ͉ metal deposition A s has been amply demonstrated in chemistry by way of metal-catalysis, metal-complexation should immensely widen the scope of carbon cluster science (1-5). Thus, metalcontaining hollow carbon clusters, such as endohedral metallofullerenes (6, 7) and carbon nanotube (NT) filled with metal atoms (3,4,(8)(9)(10)(11)(12), have been suggested as promising materials. However, the methodology to rationally control the size and the location of the metal clusters and to ensure high-yield production of the material on a large scale has been lacking. We report here a method for forming a one-to multiatom metal cluster specifically at the hydrophilic hole opening of a NT (8,13,14) as demonstrated by deposition of Gd(OAc) 3 in single-wall carbon nanohorns (NHs), a new variety of single-wall NTs (15). The hole-selective deposition of the Gd atoms allows atomic-scale detection of the structural defect in the graphitic materials, and, on a bulk scale, controls the permeability of molecules through the holes. The result would find use for modulation of the electronic properties of NTs (16).Attachment of one atom or a multiatomic cluster onto a selected location of the surface of materials is intellectually challenging and practically useful. Because the oxidized edge of NT is rich in hydrophilic functional groups, such as hydroxy and carboxyl groups (8,13,14,(17)(18)(19), and hence creates a ''locally amphiphilic'' structure (20) on a graphene sheet, we considered that selective accumulation of hydrophilic metal ions, one by one through self-assembly, onto a small hole of a partially oxidized graphene sheet should be possible. We report that treatment of single-wall NH possessing hole openings of several angstroms to Ϸ2-nm diameter with methanolic Gd(OAc) 3 ⅐(H 2 O) 4 permits selective deposition of one to several Gd(III) atoms in an opening at the tip of the tube, or a cluster of an average 1.6-nm diameter in the interior of an opening on the sidewall. The valence and the number of the deposited metal atoms were determined by high-resolution transmission electron microscopy (TEM) and quantitative electron energy-loss spectrometry (EELS) with atomic sensitivity in a dedicated scanning TEM (STEM) with 0.5-nm spatial resolution. With this analytical ...

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Reactions of Transition Metal Complexes with Fullerenes (C₆₀, C₇₀, etc.) and Related Materials

Cited by 494 publications

References 292 publications

Raman studies of Pd-C nanocomposites

Raman studies of Pd-C nanocomposites

Discrete Fulleride Anions and Fullerenium Cations

Selective deposition of a gadolinium(III) cluster in a hole opening of single-wall carbon nanohorn

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Reactions of Transition Metal Complexes with Fullerenes (C60, C70, etc.) and Related Materials

Cited by 494 publications

References 292 publications

Raman studies of Pd-C nanocomposites

Raman studies of Pd-C nanocomposites

Discrete Fulleride Anions and Fullerenium Cations

Selective deposition of a gadolinium(III) cluster in a hole opening of single-wall carbon nanohorn

Contact Info

Product

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Reactions of Transition Metal Complexes with Fullerenes (C₆₀, C₇₀, etc.) and Related Materials