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Planarization‐Induced Activation Wavelength Red‐Shift and Thermal Half‐Life Acceleration in Hydrazone Photoswitches

The optimization and modulation of the properties of photochromic compounds, such as their activation wavelengths and thermal relaxation half‐lives (τ (1/2)), are essential for their adaptation in various applications. In this work, we studied the effect of co‐planarization of the rotary fragment of...

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Detalles Bibliográficos
Autores principales: Shao, Baihao, Aprahamian, Ivan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996581/
https://www.ncbi.nlm.nih.gov/pubmed/32025464
http://dx.doi.org/10.1002/open.201900340
Descripción
Sumario:The optimization and modulation of the properties of photochromic compounds, such as their activation wavelengths and thermal relaxation half‐lives (τ (1/2)), 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.