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https://hdl.handle.net/2440/117342
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Type: | Journal article |
Title: | Norbornadiene-based photoswitches with exceptional combination of solar spectrum match and long-term energy storage |
Author: | Wang, Z. Dreos, A. Sumby, C. Nielsen, M. Börjesson, K. Erhart, P. Moth-Poulsen, K. |
Citation: | Chemistry: A European Journal, 2018; 24(49):12767-12772 |
Publisher: | Wiley |
Issue Date: | 2018 |
ISSN: | 0947-6539 1521-3765 |
Statement of Responsibility: | Martyn Jevric, Anne U. Petersen, Mads Mansø, Sandeep Kumar Singh, Zhihang Wang, Ambra Dreos, Christopher Sumby, Mogens Brønds Nielsen, Karl Börjesson, Paul Erhart and Kasper Moth-Poulsen |
Abstract: | 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. |
Keywords: | Energy storage molecular photoswitches norbornadienes quadricyclane solar energy |
Rights: | © 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim. |
DOI: | 10.1002/chem.201802932 |
Grant ID: | http://purl.org/au-research/grants/arc/LE0989336 |
Published version: | http://dx.doi.org/10.1002/chem.201802932 |
Appears in Collections: | Aurora harvest 3 Chemistry and Physics publications |
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