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Photoswitching cycle of a nitro-substituted spiropyran: Ring-opening and ring-closure dynamics

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Abstract

We perform pump-repump-probe transient absorption experiments on a spiropyran-merocyanine system demonstrating a complete closed-form/open-form/closed-form photoswitching cycle. We provide first direct experimental proof of spiropyran-derived merocyanine ring closure and measure the ring-opening dynamics.

© 2010 Optical Society of America

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