science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: styrene Other Names: benzene, ethenyl- Formula: C8H8 CAS-No.: 100-42-5 Study: absorption spectrum, quantum yields Authors: O. Brede, F. David, S. Steenken Title: Styrene triplets: Absorption spectra, lifetimes and quantum yields Journal/Source: J. Photochem. Photobiol. A: Chem., 97, 127-131, (1996); doi:10.1016/1010-6030(95)04287-3 Data: Energy/Wavelength range: Resolution: Temperature: Temperature dependence: Pressure/Concentration: Phase: pH: Comments: The triplet states of styrene, p-methyl-, p-methoxy- and p-chlorostyrene produced by direct excitation (255 nm) or by sensitization with triplet benzophenone in cyclohexane solution, were identified and their absorption spectra and their reactivity with triplet quenchers were determined. The absorption spectra are characterized by a band at about 280 nm (epsilon in the range 14000-24000 M-1 cm-1) and a weaker band (or shoulder) at about 320 nm (epsilon ~ 5000 M-1 cm-1). For direct excitation, the quantum yield for triplet formation are 0.2-0.5. Author to whom correspondence should be addressed: (e-mail address):