Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene С60

Abstract

It is demonstrated that in the SERS and SEIRA spectra of the fullerene С₆₀, the lines, which are forbidden in usual Raman and IR spectra and allowed in SERS and SEIRA, are absent. In addition the enhancement SERS coefficient in a single molecule detection regime is ~10⁸ instead of the value 10¹⁴–10¹⁵, characteristic for this phenomenon. These results are explained by the existence of so-called electrodynamical forbiddance of a strong quadrupole light-molecule interaction, which arises because of belonging of C⁶⁰ to the icosahedral symmetry group and due to the electrodynamical law divE = 0.