TY - JOUR
T1 - Photocontrolled energy storage in azobispyrazoles with exceptionally large light penetration depths
AU - Gonzalez, Alejandra
AU - Odaybat, Magdalena
AU - Le, My
AU - Greenfield, Jake L.
AU - White, Andrew J. P.
AU - Li, Xiang
AU - Fuchter, Matthew J.
AU - Han, Grace G. D.
N1 - Funding: This material is based on the work supported by the Air Force Office of Scientific Research under award number FA9550-22-1-0254. G.G.D.H. acknowledges the funding from NSF CAREER Award (DMR-2142887) and Brandeis MRSEC (DMR-2011846). M.J.F. acknowledges the Engineering and Physical Sciences Research Council (EP/R00188X/1) and the Leverhulme Trust (RPG-2018-051) for funding.
PY - 2022/10/26
Y1 - 2022/10/26
N2 - Azobispyrazole, 4pzMe-5pzH, derivatives with small terminal substituents (Me, Et, i-Pr, and n-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 ortho 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.
AB - Azobispyrazole, 4pzMe-5pzH, derivatives with small terminal substituents (Me, Et, i-Pr, and n-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 ortho 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.
UR - https://www.scopus.com/pages/publications/85140855071
U2 - 10.1021/jacs.2c07537
DO - 10.1021/jacs.2c07537
M3 - Article
C2 - 36222796
AN - SCOPUS:85140855071
SN - 0002-7863
VL - 144
SP - 19430
EP - 19436
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 42
ER -