期刊
CHEMPHOTOCHEM
卷 4, 期 1, 页码 52-58出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cptc.201900194
关键词
catalysis; magnetic properties; nanoparticles; photoswitch; solar energy storage
资金
- German Research Council (DFG) [391585168]
- DFG
- Graduate School Molecular Science (GSMS)
- Graduate School Advanced Materials and Processes (GSAMP)
We report a novel, inexpensive and effective process for the repeatable photoisomerization of norbornadiene (NBD) to its metastable isomer quadricyclane (QC), followed by catalytically induced strain energy release via back-conversion of QC to NBD. By utilization of a quasi-homogeneous catalyst based on magnetic core-shell nanoparticles, tedious purification steps are avoided. The core of this material is comprised of Fe3O4 and a catalytically active cobalt(II) complex is anchored on the particle surface as a self-assembled monolayer (SAM). These core-shell nanoparticles [Fe3O4-CoSalphen] combine a high surface area of catalytically active molecules with straightforward separation by the action of an external magnetic field. In combination with the promising interconversion couple NBD1-QC1, which features outstanding stability (t(1/2)=450 days at room temperature) and a high energy storage potential (88.34 kJ/mol), the nanoparticle catalyst [Fe3O4-CoSalphen] shows great potential for technical applications in molecular solar thermal (MOST) energy-storage systems.
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