While point (i) is a strong argument against the occurrence of S1 - S0 fluorescence, point (ii) indicates, to our opinion, only the possibility of observation of S2 - S0 fluorescence. Experimental evidence of this emission is still lacking. In this respect, theoretical calculations on the S2/S1 (and possibly S2/S0) surface crossing taking into account the ionic nature of the S2 state would be of great help.
Reply to comment: Fluorescence of antiaromatic systems: an experimental and theoretical study of 1,3,5-tri-t-butyl-pentalene / A. FALCHI; C. GELLINI; P. SALVI. - In: JOURNAL OF PHYSICAL CHEMISTRY. A, MOLECULES, SPECTROSCOPY, KINETICS, ENVIRONMENT, & GENERAL THEORY. - ISSN 1089-5639. - STAMPA. - 104:(2000), pp. 1078-1078.
Reply to comment: Fluorescence of antiaromatic systems: an experimental and theoretical study of 1,3,5-tri-t-butyl-pentalene.
GELLINI, CRISTINA;SALVI, PIER REMIGIO
2000
Abstract
While point (i) is a strong argument against the occurrence of S1 - S0 fluorescence, point (ii) indicates, to our opinion, only the possibility of observation of S2 - S0 fluorescence. Experimental evidence of this emission is still lacking. In this respect, theoretical calculations on the S2/S1 (and possibly S2/S0) surface crossing taking into account the ionic nature of the S2 state would be of great help.
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