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The Malleable Excited States of Benzothiadiazole Dyes and Investigation of their Potential for Photochemical Control

Warner, Caroline C.; Thooft, Andrea M.; Norris, Sean R.; Lampkin, Bryan J.; Demirci, Selin K.; VanVeller, Brett


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    <subfield code="a">A new design strategy to control the efficiency of a photocleavage reaction based on changing the nature of the excited state is presented. A novel class of photoactive compounds has been synthesized by combining the classicalo-nitrobenzyl scaffold with an environmentally sensitive dye, 4-amino-nitrobenzothiazole. Irradiation in a polar solvent led to an excited state that was inoperative for photochemistry whereas excitation in a nonpolar solvent led to an excited state that was photochemically active. While our design hypothesis tests true for the on/off control of a photochemical process, an alternative photochemical ring-opening of the heterocycle appears to be the preferred process in contrast to the intended photocleavage process.</subfield>
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