Norbornadiene-Based Photoswitches with Exceptional Combination of Solar Spectrum Match and Long-Term Energy Storage
Journal article, 2018

Norbornadiene-quadricyclane (NBD-QC) photoswitches are candidates for applications in solar thermal energy storage. Functionally, they rely on an intramolecular [2+2] cycloaddition reaction, which couples the S0 landscape on the NBD side to the S1 landscape on the QC side of the reaction and vice-versa. This commonly results in an unfavourable correlation between the first absorption maximum and the barrier for thermal back-conversion. This work demonstrates that this correlation can be counteracted by using steric repulsion to hamper the rotational motion of the side groups along the back-conversion path. It is shown that this modification reduces the correlation between the effective back-conversion barrier and the first absorption maximum and also increases the back-conversion entropy. The resulting molecules exhibit exceptionally long half-lives for their metastable forms without significantly affecting other properties, most notably solar spectrum match and storage density.

solar energy

quadricyclane

norbornadienes

energy storage

molecular photoswitches

Author

Martyn Jevric

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Anne Petersen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Kasper Moth-Poulsen Group

Mads Manso

University of Copenhagen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Sandeep Kumar Singh

Chalmers, Physics, Materials and Surface Theory

Zhihang Wang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Ambra Dreos

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Christopher Sumby

University of Adelaide

M. B. Nielsen

University of Copenhagen

Karl Börjesson

University of Gothenburg

Paul Erhart

Chalmers, Physics, Materials and Surface Theory

Kasper Moth-Poulsen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Kasper Moth-Poulsen Group

Chemistry - A European Journal

0947-6539 (ISSN) 1521-3765 (eISSN)

Vol. 24 49 12767-12772

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Theoretical Chemistry

DOI

10.1002/chem.201802932

More information

Latest update

1/8/2019 1