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KIT – University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association Microscopic Systems Division of the Institute of Physical Chemistry, KIT www.kit.edu C 60 + and C 60 - in Neon Matrices Bastian Kern, Dmitry Strelnikov, Patrick Weis, Artur Böttcher and Manfred M. Kappes
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Microscopic Systems Division of the Institute of Physical Chemistry 22012/06/18 Experimental Setup Bastian Kern - C 60 + and C 60 - in Neon matrices
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Microscopic Systems Division of the Institute of Physical Chemistry 32012/06/18 Comparison with existing Data Bastian Kern - C 60 + and C 60 - in Neon matrices [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 spectrum and assignment [1] own data C 60 + C 60 - C 60 C 60 - *: impurities : unidentified ~ 50 µmol C 60 + in solid Neon (2000:1) *
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Microscopic Systems Division of the Institute of Physical Chemistry 42012/06/18 Comparison with existing Data Bastian Kern - C 60 + and C 60 - in Neon matrices [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 spectrum and assignment [1] own data C 60 + C 60 - C 60 C 60 - *: impurities : unidentified CO 2 - H2OH2O * ~ 50 µmol C 60 + in solid Neon (2000:1)
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Microscopic Systems Division of the Institute of Physical Chemistry 52012/06/18 Comparison with existing Data Bastian Kern - C 60 + and C 60 - in Neon matrices [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 spectrum and assignment [1] own data C 60 + C 60 - C 60 C 60 - *: impurities : unidentified CO 2 - H2OH2O ? * ~ 50 µmol C 60 + in solid Neon (2000:1)
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Microscopic Systems Division of the Institute of Physical Chemistry 62012/06/18 Ions vs Neutrals Bastian Kern - C 60 + and C 60 - in Neon matrices Deposition of C 60 + in solid Neon Deposition of neutral C 60 in solid Neon Wavenumber cm -1
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Microscopic Systems Division of the Institute of Physical Chemistry 72012/06/18 Ions vs Neutrals Bastian Kern - C 60 + and C 60 - in Neon matrices Deposition of C 60 + in solid Neon Deposition of neutral C 60 in solid Neon Wavenumber cm -1
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Microscopic Systems Division of the Institute of Physical Chemistry 82012/06/18 Assignment of Absorption Lines Bastian Kern - C 60 + and C 60 - in Neon matrices *: impurities assignment [1] [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 C 60 + C 60 - C 60 C 60 - * Exp. 1 Exp. 2 (less cations)
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Microscopic Systems Division of the Institute of Physical Chemistry 92012/06/18 Assignment of Absorption Lines Bastian Kern - C 60 + and C 60 - in Neon matrices *: impurities assignment [1] own assignment [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 C 60 + C 60 - C 60 C 60 - C 60 C 60 + C 60 - Exp. 1 Exp. 2 (less cations)
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Microscopic Systems Division of the Institute of Physical Chemistry 102012/06/18 DFT Calculations Bastian Kern - C 60 + and C 60 - in Neon matrices Turbomole 6.2, BP86(def2-SV(P)) measurement 0 + - wavenumber calibration x0.987, intensity scaled to fit experiment + + 0 0 - - - calculation
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Microscopic Systems Division of the Institute of Physical Chemistry 112012/06/18 DFT Calculations Bastian Kern - C 60 + and C 60 - in Neon matrices Turbomole 6.2, BP86(def2-SV(P)) measurement 0 + - wavenumber calibration x0.987, intensity scaled to fit experiment + + 0 0 - - - calculation T 1u (4) T 1u (3) E u (25) E u (23)E u (19) E 1u (17) E 1u (15)
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Microscopic Systems Division of the Institute of Physical Chemistry 122012/06/18 Spatial Charge Distribution in Matrix NIR measurement, electronic absorption Bastian Kern - C 60 + and C 60 - in Neon matrices [2]: Kato, T. et al.; Chem. Phys. Lett., Vol. 180, 446, 1991 C 60 + C 60 - assignment [2] Wavenumber cm -1 2 E g 2 A 2u 2 E 1g 2 A 1u
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Microscopic Systems Division of the Institute of Physical Chemistry 132012/06/18 Spatial Charge Distribution in Matrix I(anion)/I(cation) Bastian Kern - C 60 + and C 60 - in Neon matrices [1]: Fulara J.; Jakobi M.; Maier J. P.; Chem. Phys. Lett., Vol. 211, 227–234, 1993 [2]: Kato, T. et al.; Chem. Phys. Lett., Vol. 180, 446, 1991 C 60 + C 60 - assignment [2] transitions [1] Wavenumber cm -1 2 E g 2 A 2u 2 E 1g 2 A 1u
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Microscopic Systems Division of the Institute of Physical Chemistry 142012/06/18 Spatial Charge Distribution in Matrix Bastian Kern - C 60 + and C 60 - in Neon matrices C 60 + C 60 - C 60 C 60 - C 60 + C 60 - Wavenumber cm -1 good spatial ersolution weak absorption
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Microscopic Systems Division of the Institute of Physical Chemistry 152012/06/18 Integrated Molar Absorptivities of C 60 Ions Bastian Kern - C 60 + and C 60 - in Neon matrices C 60 + C 60 C 60 - C 60 C 60 + + C 60 - 2 C 60
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Microscopic Systems Division of the Institute of Physical Chemistry 162012/06/18 Integrated Molar Absorptivities of C 60 Ions Bastian Kern - C 60 + and C 60 - in Neon matrices C 60 + C 60 C 60 - C 60 C 60 + + C 60 - 2 C 60 [3]: Iglesias-Groth, S.; Cataldo F.; Manchado A.; Mon. Not. R. Astron. Soc., Vol. 413, Issue 1, 213–222, 2011
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Microscopic Systems Division of the Institute of Physical Chemistry 172012/06/18 Integrated Molar Absorptivities of C 60 Ions Bastian Kern - C 60 + and C 60 - in Neon matrices C 60 + C 60 C 60 - C 60 C 60 + + C 60 - 2 C 60 Absolute values for ions (in km mol -1 ) C 60 - 128 10 (1386 cm -1 ) 26 4 (1332 cm -1 ) 7.7 1.2 (1201 cm -1 ) C 60 + 97 25 (1550 cm -1 ) 70 18 (1406 cm -1 )
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Microscopic Systems Division of the Institute of Physical Chemistry 182012/06/18 Summary Different ionic states inside noble gas matrices are not uniformly distributed in our setup can be used to distinguish cations from anions Assignment of ionic IR absorption lines were revised and extended Integrated molar absorptivities of C 60 ions were derived New data is significant for astronomical data Work on other Fullerenes (IPR and non-IPR) in progress Bastian Kern - C 60 + and C 60 - in Neon matrices
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Microscopic Systems Division of the Institute of Physical Chemistry 192012/06/18 Acknowledgment Bastian Kern - C 60 + and C 60 - in Neon matrices Prof. Manfred M. Kappes PD Dr. Patrick Weis Dr. Dmitry Strelnikov PD Dr. Artur Böttcher
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