Solvent effects on the absorption spectra of polyanthracene

Abstract

The synthesized polyanthracene was subjected to UV-Vis absorption analysis using different solvents of increasing polarity, namely, o-xylene, toluene, chloroform, dichloromethane, tetrahydrofuran, and ethanol. The obtained UV-Vis spectra contained peaks exhibiting hypsochromic or blue shift from 359 nm to 356 nm and 297 nm to 234 nm with increasing solvent polarity from o-xylene to ethanol. Broad peaks were observed in the more polar solvents at the shorter wavelengths of the spectra as well. These observations were due to the formation of polyanthracene aggregates and the polyanthracene-solvent stabilization at the ground state over its excited state.