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Chemphyschem
; 21(7): 610-615, 2020 Apr 02.
Artículo
en Inglés
| MEDLINE
| ID: mdl-31990122
RESUMEN
The solvent Stark effect on the spectral shifts of anthracene is studied with temperature-dependent solvatochromic measurements. The Stark contribution ΔvStark to the absorption shift Δvp in polar solvents is measured to be ΔvStark =(53±35)â cm-1 , in reasonable agreement with dielectric continuum theory estimate of 28â cm-1 , whereas the major shift Δvp â¼300â cm-1 presumably originates from the solute quadrupole. We pay attention to the accurate correction of Δvp for the nonpolar contribution that is crucial when the shifts are modest in magnitude.