Abstract
In this paper we present and discuss the results obtained from ab-initio quantum scattering calculations of the response from neutral aromatic species like C6H5 (phenyl) and C6H4 (benzyne, ortho isomer) to low-energy electron collisions. Our main purpose is to investigate the possible mechanisms that can lead to the final formation of their stable negative ions under astrophysical conditions, by linking low-lying metastable anionic states to bound anionic states. Quantum chemical calculations were also employed to confirm the features of the metastable resonant states found by the scattering calculations, while the role of the permanent dipole moments of both systems on the scattering behaviour for near-threshold electrons is also analysed in some detail. The possible energy redistribution paths for stabilizing both anionic species under ISM conditions are discussed in the conclusions.
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References
A.G.G.M. Tielens, in The Physics and Chemistry of the Interstellar Medium (Cambridge University Press, Cambridge, 2005)
A.G.G.M. Tielens, in PAHs and the Universe (EAS Publications, 2011), Vol. 46, p. 3
F. Salama et al., ApJ 728, 154 (2011)
C.W. Bauschlicher et al., ApJS 189, 341 (2010)
T.P. Snow, V.M. Bierbaum, Annu. Rev. Anal. Chem. 1, 229 (2008)
J.P. Maier et al., ApJ 726, 41 (2011)
T. Oka, B.J. McCall, Science 331, 293 (2011)
J. Cernicharo et al., ApJ 546, L123 (2001)
P. Ehrenfreund, A.M. Sephton, Faraday Discuss. 133, 277 (2006)
A.G.G.M. Tielens, Proc. Int. Astr. Union, edited by J. Cernicharo, R. Bachiller (Cambridge University Press, Cambridge, 2011), Vol. 280
S. Kwok, in The Origin and Evolution of Planetary Nebulae (Cambridge University Press, Cambridge, 2000)
S. Kwok, ApJ 198, 583 (1975)
J.H. Black, Proc. Int. Astr. Union, edited by J. Cernicharo, R. Bachiller (Cambridge University Press, 2011), Vol. 280
D.M. Hudgins, L.J. Allamandola, ApJ 516, L41 (1999)
S. Kwok, K. Volk, P. Bernath, ApJ 554, L87 (2001)
F. Carelli, F. Sebastianelli, I. Baccarelli, F.A. Gianturco, ApJ 712, 445 (2010)
F. Carelli, F. Sebastianelli, M. Satta, F.A. Gianturco, MNRAS 415, 425 (2011)
R.F. Gunion, M.K. Gilles, M.L. Polak, W.C. Lineberger, Int. J. Mass Spectrom. Ion Proc. 117, 601 (1992)
P.G. Wenthold, R.R. Squires, W.C. Lineberger, J. Am. Chem. Soc. 120, 5279 (1998)
R.J. McMahon et al., ApJ 590, L61 (2003)
E. Kraka, D. Cremer, Chem. Phys. Lett. 216, 333 (1993)
S. Lepp, A. Dalgarno, ApJ 324, 553 (1988)
V. Wakelam, E. Herbst, ApJ 680, 371 (2008)
N.J. Demarais, Z. Yang, O. Martinez Jr., N. Wehres, T.P. Snow, V.M. Bierbaum, ApJ 746, 32 (2012)
R.R. Lucchese, F.A. Gianturco, Int. Rev. Phys. Chem. 15, 429 (1996)
F.A. Gianturco, P. Paioletti, in Novel Aspect of Electron-Molecule Collisions, edited by K.H. Becker (World Scientific, 1998)
N. Sanna, F.A. Gianturco, in Photon and Electron Collisions with Atoms and Molecules, edited by P.G. Burke, C.J. Joachain (Plenum, New York, 1997)
S.L. Altman, A.P. Cracknell, Rev. Mod. Phys. 37, 19 (1965)
S. Hara, J. Phys. Soc. Jpn 22, 710 (1967)
R. Curik, F.A. Gianturco, R.R. Lucchese, N. Sanna, J. Phys. B 34, 59 (2001)
F.A. Gianturco, A. Jain, Phys. Rep. 143, 348 (1986)
M.J. Frisch et al., Gaussian 03 (Gaussian, Inc., Wallingford CT, 2004)
R.J. Taylor, Scattering Theory (John Wiley & Sons, New York, 1972)
J. Simons, J. Phys. Chem. A 112, 6401 (2008)
G.A. Gallup, Phys. Rev. A 80, 012511 (2009)
O.H. Crawford, Proc. Roy. Soc. (London) 91, 279 (1967)
A. Dalgarno, Chem. Phys. Lett. 1, 23 (1967)
J.E. Turner, Am. J. Phys. 45, 758 (1977)
NIST, Computational Chemistry Comparison and Benchmark Database
J.B. Foresman, M. Head-Gordon, J.A. Pople, M.J. Frisch, Phys. Chem. 96, 135 (1992)
P.G. Wenthold, J. Hu, R.R. Squires, J. Am. Chem. Soc. 118, 11865 (1996)
S. Cales, C. Desfrançois, J.P. Schermann, D.M.A. Smith, L. Adamovicz, J. Chem. Phys. 112, 3726 (2000)
J. Simons, Acc. Chem. Res. 39, 772 (2006)
S. Miyabe, D.J. Haxton, K.V. Lawler, A.E. Orel, C.W. McCurdy, T.N. Rescigno, Phys. Rev. A 83, 043401 (2011)
F. Carelli, T. Grassi, M. Satta, F.A. Gianturco, ApJ 774, 97 (2013)
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Carelli, F., Satta, M. & Gianturco, F.A. Resonant electron attachment to polar aromatic molecules: consequences for their chemistry in the interstellar medium. Eur. Phys. J. D 67, 230 (2013). https://doi.org/10.1140/epjd/e2013-40422-9
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DOI: https://doi.org/10.1140/epjd/e2013-40422-9