Molecular Solar Thermal Batteries through Combination of Magnetic Nanoparticle Catalysts and Tailored Norbornadiene Photoswitches

Lorenz P, Luchs T, Hirsch A (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Chemistry - A European Journal Wiley

DOI: 10.1002/chem.202005427

Abstract

Cobalt catalysts are immobilized on the surface of iron oxide nanoparticles for the preparation of highly active quasi-homogeneous catalysts toward an efficient release of photochemically stored energy in norbornadiene-based photoswitches. The facile separation of the iron oxide nanoparticles through exploitation of the intrinsic magnetic properties of this material enables efficient cyclization of energy storage and release. Through the transition from cobalt (II) salphen to cobalt porphyrins, a 22.6-fold increase in the catalytic efficiency of the QC-NBD back-conversion is achieved, with an initial TOF of up to 3.64 s−1 and excellent TON of over 3305. In addition, a series of novel “push–pull” functionalized norbornadiene derivatives is prepared, featuring excellent absorption properties with maxima up to 366 nm, quantum yields around 70 %, high energy storage capacities of up to 98.0 kJ mol−1, and outstanding thermal stability with t1/2 (25 °C) over 100 days. Finally, the energy storage potential of these molecular solar thermal (MOST) systems is harnessed in a heat release experiment. This demonstrates the potential of norbornadiene-based photoswitches in combination with efficient magnetic catalysts for the generation of environmentally benign process heat.

Authors with CRIS profile

Patrick Lorenz Lehrstuhl für Organische Chemie II Tobias Luchs Lehrstuhl für Organische Chemie II Andreas Hirsch Lehrstuhl für Organische Chemie II

How to cite

APA:

Lorenz, P., Luchs, T., & Hirsch, A. (2021). Molecular Solar Thermal Batteries through Combination of Magnetic Nanoparticle Catalysts and Tailored Norbornadiene Photoswitches. Chemistry - A European Journal. https://dx.doi.org/10.1002/chem.202005427

MLA:

Lorenz, Patrick, Tobias Luchs, and Andreas Hirsch. "Molecular Solar Thermal Batteries through Combination of Magnetic Nanoparticle Catalysts and Tailored Norbornadiene Photoswitches." Chemistry - A European Journal (2021).

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