Electrodynamical Forbiddance of the Strong Quadrupole Light-Molecule Interaction and Its Experimental Manifestation in Fullerene C60

TL;DR

The paper demonstrates that the expected strong quadrupole light-molecule interaction signals are absent in fullerene C60 due to electrodynamical forbiddance, highlighting a fundamental symmetry-based suppression.

Contribution

It provides experimental evidence for electrodynamical forbiddance of quadrupole interactions in highly symmetric molecules like C60.

Findings

Forbidden lines are absent in C60 spectra.

Electrodynamical forbiddance applies to molecules with cubic symmetry.

Experimental validation of theoretical symmetry considerations.

Abstract

It is demonstrated that the forbidden lines, which must be present in the SERS, TERS and SEIRA spectra of molecules with sufficiently high symmetry, associated with a strong quadrupole light-molecule interaction, are absent in the fullerene C60. This result is an experimental manifestation of an electrodynamical forbiddance of the strong quadrupole light-molecule interaction, which must be not only in molecules with cubic symmetry groups, but in the fullerene C60 also.