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Published on: April 1, 2013
Evaluating the Solvent Stark Effect from Temperature-Dependent Solvatochromic Shifts of Anthracene
Timais Janz1, Manuel Güterbock1, Fabian Müller1
1Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489, Berlin, Germany.
Abstract:
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) cm-1 , in reasonable agreement with dielectric continuum theory estimate of 28 cm-1 , whereas the major shift Δvp ∼300 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.
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