Planarization-Induced Activation Wavelength Red-Shift and Thermal Half-Life Acceleration in Hydrazone Photoswitches |
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Authors: | Baihao Shao Prof. Dr. Ivan Aprahamian |
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Affiliation: | Department of Chemistry, Dartmouth College, 6128 Burke Laboratory Hanover, New Hampshire, 03755 USA |
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Abstract: | The optimization and modulation of the properties of photochromic compounds, such as their activation wavelengths and thermal relaxation half-lives (τ1/2), are essential for their adaptation in various applications. In this work, we studied the effect of co-planarization of the rotary fragment of two photochromic hydrazones with the core of the molecule on their switching properties. The Z and E isomers of both compounds exhibit red-shifted absorption bands relative to their twisted versions, allowing for their photoswitching using longer wavelengths of light. Additionally, the thermal half-lives of both hydrazones are drastically shortened from hundreds of years to days. |
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Keywords: | photochromism hydrazone red-shifted activation isochroman accelerated half-life |
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