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The triplet states of styrene, p-methyl-, p-methoxy- and p-chlorostyrene produced by direct excitation (266 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 (ε in the range 14000-24000 M -1 ...
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