Development of fluorinated COFs for divergent solar fuels applications Albert Gallego-Gamo , Albert Granados, Adelina Vallribera, Carolina Gimbert-Suriñach Departament de Química and Centro de Innovación en Quimica Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Campus UAB, 08193-Cerdanyola del Vallès, Barcelona, Spain In recent years organofluorine chemistry has had a great impact on scientific research, academia and industry due to its fascinating features and wide applications. Among them, its emergence in the synthesis of functional materials or its incorporation in biologically active skeletons have been of utmost importance. The presence of fluorine in organic molecules and materials allowed them to exhibit unprecedented properties in contrast to their non-fluorinated counterparts. [1] Nowadays, the energy supply for humanity is problematic. Therefore, the design of new sustainable platforms is a requirement for researchers. In this scenario, the use of visible-light as an energy source is emerging as a true replacement for non-renewable feedstocks. The progress in artificial photosynthesis to obtain solar fuels H 2 is an example of its implementation in the chemistry field. [2] In this regard, an emerging family of materials with potential application in sustainable catalytic platforms are Covalent Organic Frameworks (COF). In fact, the use of such heterogeneous materials for light promotion of water-splitting half-reactions has extensively been exploited in recent years. [3,4] In this work, the synthesis of trifunctional fluorinated molecules and their use as monomers in the preparation of a palette of COF derivatives is described. A study of the structural, spectroscopic and electronic properties of the resulting materials is proposed to assess the influence of fluorine on the final design. Their use as heterogeneous support and/or photosensitizer on different catalytic platforms is presented. It has been observed that, by changing the degree of fluorination, catalytic efficiency and potential applications of such constructions can be modulated highlighting its plausible implementation in solar fuel generation. References 1. Dolui, S.; Kumar, D.; Banerjee, S.; Ameduri, B. Acc. Mater. Res. 2021 , 2 , 242; 2. Berardi, S.; Drouet, S.; Francàs, L.; Gimbert-Suriñach, C.; Guttentag, M.; Richmond, C.; Stoll, T.; Llobet, A. Chem. Soc. Rev. 2014 , 43 , 7501; 3. Rodríguez-Camargo, A.; Endo, K.; Lotsch, B. V. Angew. Chem. Int. Ed. 2024 , 63 , e202413096; 4. Han, W.-K.; Yuan, W.; Gu, Z.-G.; Zhao, Y. ACS Materials Lett. 2024 , 6 , 2276
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