Tuning the Temperature Dependence for Switching in Dithienylethene Photochromic Switches
| العنوان: | Tuning the Temperature Dependence for Switching in Dithienylethene Photochromic Switches |
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| المؤلفون: | Tibor Kudernac, Kingo Uchida, Bernard Feringa, Ayaka Uyama, Takao Kobayashi, Shinichiro Nakamura |
| المساهمون: | Molecular Nanofabrication, Stratingh Institute of Chemistry, Synthetic Organic Chemistry, Physics of Nanodevices |
| المصدر: | Journal of physical chemistry A, 117(34), 8222-8229. American Chemical Society The Journal of Physical Chemistry A The Journal of Physical Chemistry A, 117(34), 8222-8229. AMER CHEMICAL SOC |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | SURFACE, ELECTRODES, 010402 general chemistry, Photochemistry, 01 natural sciences, chemistry.chemical_compound, Photochromism, Diarylethene, DOPANT, Molecule, MOLECULAR DEVICES, Thermal stability, DIARYLETHENE, Physical and Theoretical Chemistry, Dopant, Photoswitch, CRYSTAL, PHOTOIRRADIATION, 010405 organic chemistry, PHOTOSWITCH, 0104 chemical sciences, DITHIENYLCYCLOPENTENES, chemistry, Chemical physics, IR-93531, Potential energy surface, Quantum efficiency |
| الوصف: | Diarylethene photochromic switches use light to drive structural changes through reversible electrocyclization reactions. High efficiency in dynamic photoswitching is a prerequisite for applications, as is thermal stability and the selective addressability of both isomers ring-opened and -closed diarylethenes. These properties can be optimized readily through rational variation in molecular structure. The efficiency with regard to switching as a function of structural variation is much less understood, with the exception of geometric requirements placed on the reacting atoms. Ultimately, increasing the quantum efficiency of photochemical switching in diarylethenes requires a detailed understanding of the excited-state potential energy surface(s) and the mechanisms involved in switching. Through studies of the temperature dependence, photoswitching and theoretical studies demonstrate the occurrence or absence of thermal activation barriers in three constitutional isomers that bear distinct pi-conjugated systems. We found that a decrease in the thermal barriers correlates with an increase in switching efficiency. The origin of the barriers is assigned to the decrease in pi-conjugation that is concomitant with the progress of the photoreaction. Furthermore, we show that balanced molecular design can minimize the change in the extent of pi-conjugation during switching and lead to optimal bidirectional switching efficiencies. Our findings hold implications for future structural design of diarylethene photochromic switches. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1089-5639 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d287c9b96b0dba8bd4a0a53b1f904b5d https://doi.org/10.1021/jp404924q |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d287c9b96b0dba8bd4a0a53b1f904b5d |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 10895639 |
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