Electrodynamical forbiddance of a strong quadrupole light-molecule interaction in fullerene C60 and its withdrawal in fullerene C70

[Display omitted] •Forbidden lines are absent in the SERS spectrum of the fullerene C60.•However they appear in the fullerene C70.•They are those, which are allowed in infrared absorption.•This result is a consequence of withdrawal of electrodynamical forbiddance in C70. It is demonstrated that in f...

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Bibliographic Details
Published in:Chemical physics letters 2018-03, Vol.695, p.235-239
Main Authors: Chelibanov, V.P., Polubotko, A.M.
Format: Article
Language:English
Subjects:
Electrodynamical forbiddance
Forbidden lines
Fullerene
Quadrupole
SERS
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Summary:[Display omitted] •Forbidden lines are absent in the SERS spectrum of the fullerene C60.•However they appear in the fullerene C70.•They are those, which are allowed in infrared absorption.•This result is a consequence of withdrawal of electrodynamical forbiddance in C70. It is demonstrated that in fullerene C70, there is a withdrawal of an Electrodynamical forbiddance of a strong quadrupole light-molecule interaction, which is realized in the fullerene C60. This situation occurs because of the reduction of symmetry of C70 from the icosahedral symmetry group Yh to the group D5h. The withdrawal results in appearance of the lines in the SERS spectra of C70, which are forbidden in usual Raman scattering and are allowed in infrared absorption. The measured SERS spectra of C70 demonstrates existence of such lines that strongly confirms our ideas about the dipole –quadrupole SERS mechanism.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2018.02.010