Chlorination of charged buckyballs: reactions of C60x+ cations (x = 1–3) with Cl2, CCl4, CDCl3, CH2Cl2, and CH3Cl

Ling, Yun; Koyanagi, Gregory K.; Caraiman, Doina; Baranov, Vladimir; Böhme, Diethard K.

doi:10.1016/s1387-3806(98)14247-1

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…These in situ Raman results thus indicate that defect sites (sp 3 ‐like) irreversibly interact with Cl 2 , whereas CC bonds (sp 2 ‐type) can give reversible chemisorption of Cl 2 . However, pure graphene does not interact with Cl 2 (except at the edges), neither is it active in phosgene generation, and the highly strained CC bonds in fullerene give only irreversible dissociative chemisorption 62. 63…”

Section: Resultsmentioning

confidence: 99%

Water‐Soluble Iridium‐NHC‐Phosphine Complexes as Catalysts for Chemical Hydrogen Batteries Based on Formate

Horváth¹,

Papp²,

Szabolcsi

et al. 2015

ChemSusChem

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Molecular hydrogen, obtained by water electrolysis or photocatalytic water splitting, can be used to store energy obtained from intermittent sources such as wind and solar power. The storage and safe transportation of H2 , however, is an open and central question in such a hydrogen economy. Easy-to-synthesize, water-soluble iridium-N-heterocyclic carbene-phosphine (Ir(I) -NHC-phosphine) catalysts show unprecedented high catalytic activity in dehydrogenation of aqueous sodium formate. Fast reversible generation and storage of hydrogen can be achieved with these catalysts by a simple decrease or increase in the hydrogen pressure, respectively.

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Section: Resultsmentioning

confidence: 99%

Water‐Soluble Iridium‐NHC‐Phosphine Complexes as Catalysts for Chemical Hydrogen Batteries Based on Formate

Horváth¹,

Papp²,

Szabolcsi

et al. 2015

ChemSusChem

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Section: Resultsmentioning

confidence: 99%

Onion‐Like Graphene Carbon Nanospheres as Stable Catalysts for Carbon Monoxide and Methane Chlorination

et al. 2015

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Thermal treatment induces a modification in the nanostructure of carbon nanospheres that generates ordered hemi‐fullerene‐type graphene shells arranged in a concentric onion‐type structure. The catalytic reactivity of these structures is studied in comparison with that of the parent carbon material. The change in the surface reactivity induced by the transformation of the nanostructure, characterized by TEM, XRD, X‐ray photoelectron spectroscopy (XPS), Raman, and porosity measurements, is investigated by multipulses of Cl2 in inert gas or in the presence of CH4 or CO. The strained CC bonds (sp2‐type) in the hemi‐fullerene‐type graphene shells induce unusually strong, but reversible, chemisorption of Cl2 in molecular form. The active species in CH4 and CO chlorination is probably in the radical‐like form. Highly strained CC bonds in the parent carbon materials react irreversibly with Cl2, inhibiting further reaction with CO. In addition, the higher presence of sp3‐type defect sites promotes the formation of HCl with deactivation of the reactive CC sites. The nano‐ordering of the hemi‐fullerene‐type graphene thus reduces the presence of defects and transforms strained CC bonds, resulting in irreversible chemisorption of Cl2 to catalytic sites able to perform selective chlorination.

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“…The experimental results obtained for the reactions with vinyl fluoride investigated in this study are summarized in Table 1 together with those obtained previously with ethylene 3 and vinyl chloride. 4 Included in Table 1 are values for collision rate coefficients calculated with the variational transition theory of Su and Chesnavich. 7 Use is made in these calculations of the dipole moments 8 and polarizabilities 8 given in Table 2 that also lists values for the ionization energies 9 of these three molecules.…”

Section: Resultsmentioning

confidence: 99%

“…For example, recent systematic studies in our laboratory of the chemistry of C 60 n+ cations in the gas phase 2 have suggested that C 60 •3+ is particularly effective in the ball-and-chain polymerization of ethylene 3 but that vinyl chloride is not suited to cation-induced polymerization with this initiator because of its relatively low ionization energy. 4 C 60 •3+ reacts with vinyl chloride exclu-sively by electron transfer. Both ethylene and vinyl chloride also react with the doubly-charged ion C 60 2+ by addition, but much more slowly than with C 60…”

Section: Introductionmentioning

confidence: 99%

Selected-ion flow tube studies of reactions of C60n+ (n = 1, 2, 3) with vinyl fluoride: polymerization initiated by C60•3+

Ling

Böhme

1999

Eur. J. Mass Spectrom.

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Results are reported for kinetic measurements of reactions between the C 60 n+ cations C 60 •+ , C 60 2+ and C 60 •3+ and vinyl fluoride in the gas phase and comparisons are provided with the chemistry previously characterized with ethylene and vinyl chloride. The measurements were made at 294 ± 3 K and 0.35 ± 0.01 Torr of helium using the Selected-Ion Flow Tube (SIFT) technique. They show that, although C 60 •+ is unreactive and C 60 2+ is barely reactive under these conditions, C 60 •3+ reacts rapidly with vinyl fluoride presumably to initiate vinyl polymerization in a manner similar to that we have proposed previously to occur with ethylene under similar operating conditions. Electron transfer competes with the initiation of the polymerization in both cases. Vinyl chloride, on the other hand, is unsuitable for cationic polymerization with C 60 •3+ as initiator because of the exclusive occurrence of electron transfer. The measurements have revealed, in a systematic way, the influence of the ionization energy of the vinyl monomer on the competition between electron transfer and initiation of vinyl polymerization by C 60 •3+ in the gas phase under SIFT conditions.

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Chlorination of charged buckyballs: reactions of C60x+ cations (x = 1–3) with Cl2, CCl4, CDCl3, CH2Cl2, and CH3Cl

Cited by 10 publications

References 19 publications

Water‐Soluble Iridium‐NHC‐Phosphine Complexes as Catalysts for Chemical Hydrogen Batteries Based on Formate

Water‐Soluble Iridium‐NHC‐Phosphine Complexes as Catalysts for Chemical Hydrogen Batteries Based on Formate

Onion‐Like Graphene Carbon Nanospheres as Stable Catalysts for Carbon Monoxide and Methane Chlorination

Selected-ion flow tube studies of reactions of C60n+ (n = 1, 2, 3) with vinyl fluoride: polymerization initiated by C60•3+

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