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Article Abstract
Azobispyrazole, 4pzMe-5pzH, derivatives with small terminal substituents (Me, Et, -Pr, and -Pr) are reported to undergo facile reversible photoswitching in condensed phases at room temperature, exhibiting unprecedentedly large effective light penetration depths (1400 μm of UV at 365 nm and 1400 μm of visible light at 530 nm). These small photoswitches exhibit crystal-to-liquid phase transitions upon UV irradiation, which increases the overall energy storage density of this material beyond 300 J/g that is similar to the specific energy of commercial Na-ion batteries. The impact of heteroarene design, the presence of methyl substituents, and the terminal functional groups is explored for both condensed-phase switching and energy storage. The design principles elucidated in this work will help to develop a wide variety of molecular solar thermal energy storage materials that operate in condensed phases.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9619401 | PMC |
| http://dx.doi.org/10.1021/jacs.2c07537 | DOI Listing |
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