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Water-soluble Molecular Solar Thermal (MOST) system: photochemical switching and catalytic back-conversion of 2,5-norbornadiene-2,3-dicarboxylic acid

In this study, we conduct a comprehensive analysis of the energy storage and release of water-soluble 2,5-norbornadiene-2,3-dicarboxylic acid (DC-NBD) integrating spectroscopic characterization, pH-dependent speciation, and photochemical response analysis. We evaluate protonation and dimerization eq...

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Main Authors: Castro Baroffio, Franco (Author) , Franz, Evanie (Author) , Pacheco, Mario (Author) , Pacheco, Daniel (Author) , Torres, Julia (Author) , Seoane, Gustavo (Author) , Manta, Eduardo (Author) , Ramos, Juan Carlos (Author) , Hussain, Zarah (Author) , Korenko, Sofia (Author) , Bachmann, Julien (Author) , Oberhof, Nils (Author) , Dreuw, Andreas (Author) , Brummel, Olaf (Author) , Libuda, Jörg (Author) , Gancheff, Jorge S. (Author)
Format: Article (Journal)
Language:English
Published: 2026
In: Chemistry - a European journal
Year: 2026, Pages: 1-13
ISSN:1521-3765
DOI:10.1002/chem.202502510
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/chem.202502510
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.202502510
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Author Notes:Franco Castro Baroffio, Evanie Franz, Mario Pacheco, Daniel Pacheco, Julia Torres, Gustavo Seoane, Eduardo Manta, Juan Carlos Ramos, Zarah Hussain, Sofia Korenko, Julien Bachmann, Nils Oberhof, Andreas Dreuw, Olaf Brummel, Jörg Libuda, Jorge S. Gancheff
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Summary:In this study, we conduct a comprehensive analysis of the energy storage and release of water-soluble 2,5-norbornadiene-2,3-dicarboxylic acid (DC-NBD) integrating spectroscopic characterization, pH-dependent speciation, and photochemical response analysis. We evaluate protonation and dimerization equilibria using potentiometric and 1H-NMR techniques, revealing three well-defined pH intervals that affect the reactivity and stability of the system. The photoinduced conversion of DC-NBD to DC-QC was investigated at different pH conditions, while the catalytic back-conversion of the most stable quadricyclane species (DC-QC2-) was evaluated on Au(111) and Pt(111) single-crystal surfaces by time-resolved photochemical infrared reflection absorption spectroscopy (PC-IRRAS) and density functional theory. Our findings demonstrate that photoisomerization and catalytic back-conversion can be efficiently conducted in an aqueous environment, eliminating the need for organic solvents. This study advances the development of water-soluble MOST systems, offering key insights into the molecular design and optimization of sustainable photoactive materials. Future research should focus on enhancing photochemical efficiency, improving long-term stability, searching for more active catalysts and scaling these systems for practical solar energy storage applications.
Item Description:Gesehen am 11.06.2026
Physical Description:Online Resource
ISSN:1521-3765
DOI:10.1002/chem.202502510

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