A Liquid Arylazopyrazole Derivative as Molecular Solar Thermal Fuel with Long-term Thermal Stability

A Liquid Arylazopyrazole Derivative as Molecular Solar Thermal Fuel with Long-term Thermal Stability

A liquid arylazopyrazole derivative is newly synthesized as molecular solar thermal fuel. It shows efficient trans-to-cis photoisomerization in the neat liquid state, with the cis-isomer having a significantly longer thermal half-life (t1/2 = 3,069 h, at 25 °C). It overcomes the limited thermal stab...

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Veröffentlicht in:Chemistry letters 2020-06, Vol.49 (6), p.736-740
Hauptverfasser: Morikawa, Masa-aki, Yang, Hanyu, Ishiba, Keita, Masutani, Kouta, Hui, Joseph K.-H., Kimizuka, Nobuo
Format: Artikel
Sprache:eng
Schlagworte:
Chemical synthesis
Coordination Asymmetry
Flux density
Fuels
Gravimetry
Heat storage
Solar heating
Thermal stability
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Zusammenfassung:A liquid arylazopyrazole derivative is newly synthesized as molecular solar thermal fuel. It shows efficient trans-to-cis photoisomerization in the neat liquid state, with the cis-isomer having a significantly longer thermal half-life (t1/2 = 3,069 h, at 25 °C). It overcomes the limited thermal stability of the corresponding liquid cis-azobenzene derivative (t1/2 = 16 h) and marked a gravimetric energy density of 41 kJ·mol−1, which meets the requirement for thermophysical heat storage applications.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.200171