Porous organic frameworks (PAFs) and Metal-organic frameworks (MOFs) were extensively studied in the past 20 years, widening the landscape of microporous materials. Responsive porous frameworks can be manipulated by means of external stimuli such as applied electric field or light irradiation, thus controlling their textural properties at will. Molecular photoswitches were co-polymerized with tetraphenylmethane generating 3D PAFs with high surface area (up to 4800 m2/g) and photo-responsive properties that quantitatively switch between stable and metastable state under U.V. light irradiation[1]. The localized and reversible photoisomerization reaction modified the bulk adsorptive properties of the porous materials with a 20% modulation of the adsorption capacity. These materials can be engineered to provide “on demand” adsorption properties for gas separation and gas storage/release. Scintillating materials are widely employed in high-energy particles detection and medical imaging. Innovative composite scintillators with high light yield and fast response time were developed embedding luminescent MOFs in a polymer matrix[2]. Highly emissive MOFs nanocrystals (ZrDPA) were synthetized by the assembly of 9,10-bis(4-carboxyphenyl)anthracene (DPA) and zirconium oxo-hydroxy cluster and dispersed in polymer matrixes to obtain self-standing monoliths. The MOF/polymer composites showed outstanding radioluminescence and scintillating properties with high light yields and scintillation rise time of ~ 50 ps, making them suitable for application in detectors for time-of-flight positron emission tomography (TOF-PET). [1] F. Castiglioni, W. Danowski, J. Perego, F. K.-C. Leung, P. Sozzani, S. Bracco, S. J. Wezenberg, A. Comotti, B. L. Feringa, Nature Chemistry. 2020, 12, 595. [2] J. Perego, I. Villa, A. Pedrini, E. C. Padovani, R. Crapanzano, A. Vedda, C. Dujardin, C. X. Bezuidenhout, S. Bracco, P. E. Sozzani, A. Comotti, L. Gironi, M. Beretta, M. Salomoni, N. Kratochwil, S. Gundacker, E. Auffray, F. Meinardi, A. Monguzzi, Nature Photonics, 2021, https://doi.org/10.1038/s41566-021-00769-z.
Perego, J., Bezuidenhout, C., Bracco, S., Comotti, A., Sozzani, P. (2021). Advanced porous frameworks: stimuli-responsive gas adsorption and fast scintillating materials for ionizing radiation detection. In Book of Abstracts - SCI 2021, XXVII Congresso nazionale della Società Chimica Italiana,14-23 settembre 2021.
Advanced porous frameworks: stimuli-responsive gas adsorption and fast scintillating materials for ionizing radiation detection
Jacopo Perego
Primo
Membro del Collaboration Group
;Charl X. BezuidenhoutMembro del Collaboration Group
;Silvia BraccoMembro del Collaboration Group
;Angiolina ComottiMembro del Collaboration Group
;Piero SozzaniMembro del Collaboration Group
2021
Abstract
Porous organic frameworks (PAFs) and Metal-organic frameworks (MOFs) were extensively studied in the past 20 years, widening the landscape of microporous materials. Responsive porous frameworks can be manipulated by means of external stimuli such as applied electric field or light irradiation, thus controlling their textural properties at will. Molecular photoswitches were co-polymerized with tetraphenylmethane generating 3D PAFs with high surface area (up to 4800 m2/g) and photo-responsive properties that quantitatively switch between stable and metastable state under U.V. light irradiation[1]. The localized and reversible photoisomerization reaction modified the bulk adsorptive properties of the porous materials with a 20% modulation of the adsorption capacity. These materials can be engineered to provide “on demand” adsorption properties for gas separation and gas storage/release. Scintillating materials are widely employed in high-energy particles detection and medical imaging. Innovative composite scintillators with high light yield and fast response time were developed embedding luminescent MOFs in a polymer matrix[2]. Highly emissive MOFs nanocrystals (ZrDPA) were synthetized by the assembly of 9,10-bis(4-carboxyphenyl)anthracene (DPA) and zirconium oxo-hydroxy cluster and dispersed in polymer matrixes to obtain self-standing monoliths. The MOF/polymer composites showed outstanding radioluminescence and scintillating properties with high light yields and scintillation rise time of ~ 50 ps, making them suitable for application in detectors for time-of-flight positron emission tomography (TOF-PET). [1] F. Castiglioni, W. Danowski, J. Perego, F. K.-C. Leung, P. Sozzani, S. Bracco, S. J. Wezenberg, A. Comotti, B. L. Feringa, Nature Chemistry. 2020, 12, 595. [2] J. Perego, I. Villa, A. Pedrini, E. C. Padovani, R. Crapanzano, A. Vedda, C. Dujardin, C. X. Bezuidenhout, S. Bracco, P. E. Sozzani, A. Comotti, L. Gironi, M. Beretta, M. Salomoni, N. Kratochwil, S. Gundacker, E. Auffray, F. Meinardi, A. Monguzzi, Nature Photonics, 2021, https://doi.org/10.1038/s41566-021-00769-z.
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