Thermal stability and high temperature graphitization of bisazafullerene (C59N)2 as studied by IR and Raman spectroscopy

Matthias Krause; Silvia Baes-Fischlmair; Rudolf Pfeiffer; Wolfgang Plank; Thomas Pichler; Hans Kuzmany; Nikos Tagmatarchis; Kosmas Prassides

doi:10.1021/jp012186+

Thermal stability and high temperature graphitization of bisazafullerene (C₅₉N)₂ as studied by IR and Raman spectroscopy

Matthias Krause, Silvia Baes-Fischlmair, Rudolf Pfeiffer, Wolfgang Plank, Thomas Pichler, Hans Kuzmany, Nikos Tagmatarchis, Kosmas Prassides

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Thermal stability and high-temperature degradation of pristine bisazafullerene (C₅₉N)₂ were analyzed by infrared and Raman spectroscopy in the temperature range from 300 to 745 K. The spectra showed a reversible temperature dependence up to 550 K. For higher temperatures an irreversible degradation into disordered graphite was found. Approximately 55% of the material resisted a thermal treatment of 745 K for several hours. A mechanism involving a low stationary concentration of C₅₉N° monomer radical species and a slow graphitization is proposed for the thermolysis of the material. The remarkable thermal stability of pristine bisazafullerene (C₅₉N)₂ is ascribed to the low stability of the C₅₉N° monomer radical species, the high activation energy for graphitization, and the absence of other reaction partners under high vacuum conditions.

Original language	English
Pages (from-to)	11964-11969
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	48
DOIs	https://doi.org/10.1021/jp012186+
Publication status	Published - 2001 Dec 6

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Thermal stability and high temperature graphitization of bisazafullerene (C59N)2 as studied by IR and Raman spectroscopy",

abstract = "Thermal stability and high-temperature degradation of pristine bisazafullerene (C59N)2 were analyzed by infrared and Raman spectroscopy in the temperature range from 300 to 745 K. The spectra showed a reversible temperature dependence up to 550 K. For higher temperatures an irreversible degradation into disordered graphite was found. Approximately 55% of the material resisted a thermal treatment of 745 K for several hours. A mechanism involving a low stationary concentration of C59N° monomer radical species and a slow graphitization is proposed for the thermolysis of the material. The remarkable thermal stability of pristine bisazafullerene (C59N)2 is ascribed to the low stability of the C59N° monomer radical species, the high activation energy for graphitization, and the absence of other reaction partners under high vacuum conditions.",

author = "Matthias Krause and Silvia Baes-Fischlmair and Rudolf Pfeiffer and Wolfgang Plank and Thomas Pichler and Hans Kuzmany and Nikos Tagmatarchis and Kosmas Prassides",

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language = "English",

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T1 - Thermal stability and high temperature graphitization of bisazafullerene (C59N)2 as studied by IR and Raman spectroscopy

AU - Krause, Matthias

AU - Baes-Fischlmair, Silvia

AU - Pfeiffer, Rudolf

AU - Plank, Wolfgang

AU - Pichler, Thomas

AU - Kuzmany, Hans

AU - Tagmatarchis, Nikos

AU - Prassides, Kosmas

PY - 2001/12/6

Y1 - 2001/12/6

N2 - Thermal stability and high-temperature degradation of pristine bisazafullerene (C59N)2 were analyzed by infrared and Raman spectroscopy in the temperature range from 300 to 745 K. The spectra showed a reversible temperature dependence up to 550 K. For higher temperatures an irreversible degradation into disordered graphite was found. Approximately 55% of the material resisted a thermal treatment of 745 K for several hours. A mechanism involving a low stationary concentration of C59N° monomer radical species and a slow graphitization is proposed for the thermolysis of the material. The remarkable thermal stability of pristine bisazafullerene (C59N)2 is ascribed to the low stability of the C59N° monomer radical species, the high activation energy for graphitization, and the absence of other reaction partners under high vacuum conditions.

AB - Thermal stability and high-temperature degradation of pristine bisazafullerene (C59N)2 were analyzed by infrared and Raman spectroscopy in the temperature range from 300 to 745 K. The spectra showed a reversible temperature dependence up to 550 K. For higher temperatures an irreversible degradation into disordered graphite was found. Approximately 55% of the material resisted a thermal treatment of 745 K for several hours. A mechanism involving a low stationary concentration of C59N° monomer radical species and a slow graphitization is proposed for the thermolysis of the material. The remarkable thermal stability of pristine bisazafullerene (C59N)2 is ascribed to the low stability of the C59N° monomer radical species, the high activation energy for graphitization, and the absence of other reaction partners under high vacuum conditions.

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SN - 1520-6106

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Thermal stability and high temperature graphitization of bisazafullerene (C₅₉N)₂ as studied by IR and Raman spectroscopy

Abstract

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