Journal article

Authors list: Kunz, A; Heindl, AH; Dreos, A; Wang, ZH; Moth-Poulsen, K; Becker, J; Wegner, HA

Publication year: 2019

Pages: 1145-1148

Journal: ChemPlusChem

Volume number: 84

Issue number: 8

ISSN: 2192-6506

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/cplu.201900330

Publisher: Wiley

Abstract: 
The performance of molecular solar thermal energy storage systems (MOST) depends amongst others on the amount of energy stored. Azobenzenes have been investigated as high-potential materials for MOST applications. In the present study it could be shown that intermolecular attractive London dispersion interactions stabilize the (E)-isomer in bisazobenzene that is linked by different alkyl bridges. Differential scanning calorimetry (DSC) measurements revealed, that this interaction leads to an increased storage energy per azo-unit of more than 3 kcal/mol compared to the parent azobenzene. The origin of this effect has been supported by computation as well as X-ray analysis. In the solid state structure attractive London dispersion interactions between the C-H of the alkyl bridge and the pi-system of the azobenzene could be clearly assigned. This concept will be highly useful in designing more effective MOST systems in the future.

Harvard Citation style: Kunz, A., Heindl, A., Dreos, A., Wang, Z., Moth-Poulsen, K., Becker, J., et al. (2019) Intermolecular London Dispersion Interactions of Azobenzene Switches for Tuning Molecular Solar Thermal Energy Storage Systems, ChemPlusChem, 84(8), pp. 1145-1148. https://doi.org/10.1002/cplu.201900330

APA Citation style: Kunz, A., Heindl, A., Dreos, A., Wang, Z., Moth-Poulsen, K., Becker, J., & Wegner, H. (2019). Intermolecular London Dispersion Interactions of Azobenzene Switches for Tuning Molecular Solar Thermal Energy Storage Systems. ChemPlusChem. 84(8), 1145-1148. https://doi.org/10.1002/cplu.201900330