Electronic spectra of the C70 molecule and C70+, C70− ions in neon matrices

Fulara, Jan; Jakobi, Michael; Maier, John P.

doi:10.1016/0009-2614(93)85542-v

Cited by 57 publications

(48 citation statements)

References 31 publications

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“…218 This is consistent with a λ max value of 798 nm reported for low-temperature transient production of C 70 + in a neon matrix. 195 However, the low extinction coefficient means the spectrum is not always observable 153 and is subject to masking by other chromophores. This may be the case in recent studies that ascribe bands at ca.…”

Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

“…930 and 830 nm to C 70 + . 200,202 Theory suggests additional bands in the NIR and IR regions, 153,195 and one attempt at a vibronic assignment has been made. 195 Because it is one of the easiest commercially available fullerenes to oxidize, C 76 + was in fact the first fully characterized fullerenium ion.…”

Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

“…200,202 Theory suggests additional bands in the NIR and IR regions, 153,195 and one attempt at a vibronic assignment has been made. 195 Because it is one of the easiest commercially available fullerenes to oxidize, C 76 + was in fact the first fully characterized fullerenium ion. 30 The NIR spectrum of [C 76 ][CB 11 H 6 Br 6 ] in tetrachloroethane contains several bands (1040, 980, 830, 780, 710 nm) consistent with the creation of an electron hole in the series of closely spaced electronic energy levels calculated for C 76 .…”

Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

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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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Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

Section: C 70 and Higher Fullerenesmentioning

confidence: 99%

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Discrete Fulleride Anions and Fullerenium Cations

2000

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“…Foing & Ehrenfreund (1994) reported evidence of interstellar C + 60 based on the detection of two diffuse interstellar bands (DIBs) at 9577 and 9632 Å, however this identification is still questioned considering that no spectrum of C + 60 could be Appendix A is available in electronic form at http://www.aanda.org recorded yet, in conditions appropriate for DIB identification, i.e., in gas phase and at low temperature. The IR spectrum of C + 60 was measured in a rare-gas matrix by Fulara et al (1993) and was found to exhibit two bands at 7.1 and 7.5 μm. Kern et al (2012) have performed new spectroscopic measurements and suggests that the latter band is due to C − 60 , whereas the authors attribute a band at 6.4 μm to C + 60 .…”

Section: Introductionmentioning

confidence: 99%

“…The only IR spectroscopic data of C + 60 has been obtained in rare gas matrices by Fulara et al (1993) and more recently by Kern et al (2012). Two bands at 7.1 and 6.4 μm seem definitively attributed to C + 60 , based on these experimental studies.…”

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confidence: 99%

Interstellar C₆₀⁺

Berné¹,

Mulas²,

Joblin³

2013

A&A

117

113

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Buckminsterfullerene (C 60 ) has recently been detected through its infrared emission bands in the interstellar medium (ISM), including in the proximity of massive stars, where physical conditions could favor the formation of the cationic form, C + 60 . In addition, C + 60 was proposed as the carrier of two diffuse interstellar bands in the near-IR, although a firm identification still awaits gas-phase spectroscopic data. We examined in detail the Spitzer IRS spectra of the NGC 7023 reflection nebula, at a position close (7.5 ) to the illuminating B star HD 200775, and found four previously unreported bands at 6.4, 7.1, 8.2, and 10.5 μm, in addition to the classical bands attributed to polycylic aromatic hydrocarbons (PAHs) and neutral C 60 . These 4 bands are observed only in this region of the nebula, while C 60 emission is still present slightly farther away from the star, and PAH emission even farther away. Based on this observation, on theoretical calculations we perform, and on laboratory studies, we attribute these bands to C + 60 . The detection of C + 60 confirms the idea that large carbon molecules exist in the gas phase in these environments. In addition, the relative variation in the C 60 and C + 60 band intensities constitutes a potentially powerful probe of the physical conditions in highly UV-irradiated regions.

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