Porous aromatic frameworks (PAFs) were engineered to generate solid-state upconverting materials that emit higher energy photons under a suitable light stimulus [1]. Fluorescent PAFs were generated by the inclusion of diphenylanthracene moieties in a low-density 3D porous frameworks that maintained the optical properties of the emitting chromophores in the solid-state. Upon inclusion of a suitable sensitizer (a metallo-porphyrin) inside the nanometer-sized pores, the copolymer displayed sensitized photon upconversion with a quantum yield as high as 15%, a record value for solid-state materials. Moreover, it was possible to tether the sensitizer to the porous matrix through a stable covalent bond, generating self-standing upconverting nanoparticles that can be possibly applied in photovoltaics and bio-imaging. PAFs can also be engineered as light-responsive materials. The co-polymerization of a photoswitch with tetraphenylmethane generated porous networks that provided the free volume for the photoisomerization of the overcrowded alkene [2]. Under UV light irradiation, the quantitative photoisomerization led to structural changes and modulated the CO2 adsorptive properties of the material. The process is reversible by irradiation or heating leading to a cyclable material.

Perego, J., Bracco, S., Bezuidenhout, C., Comotti, A., Sozzani, P. (2020). Light-Responsive Porous Aromatic Frameworks: Generation of Photon Upconverted Emission and Modulation of Porosity by Bulk Photoisomerization. In Materials Chemistry 2020 - Global Virtual Summit on “Advances in Materials, Physics and Chemistry Science” - September 11th & 12th, 2020 (pp.36-37) [10.33263/Proceedings22.036037].

Light-Responsive Porous Aromatic Frameworks: Generation of Photon Upconverted Emission and Modulation of Porosity by Bulk Photoisomerization

Perego, J
Membro del Collaboration Group
;
Bracco, S
Membro del Collaboration Group
;
Bezuidenhout, CX
Membro del Collaboration Group
;
Comotti, A;Sozzani, P
Membro del Collaboration Group
2020

Abstract

Porous aromatic frameworks (PAFs) were engineered to generate solid-state upconverting materials that emit higher energy photons under a suitable light stimulus [1]. Fluorescent PAFs were generated by the inclusion of diphenylanthracene moieties in a low-density 3D porous frameworks that maintained the optical properties of the emitting chromophores in the solid-state. Upon inclusion of a suitable sensitizer (a metallo-porphyrin) inside the nanometer-sized pores, the copolymer displayed sensitized photon upconversion with a quantum yield as high as 15%, a record value for solid-state materials. Moreover, it was possible to tether the sensitizer to the porous matrix through a stable covalent bond, generating self-standing upconverting nanoparticles that can be possibly applied in photovoltaics and bio-imaging. PAFs can also be engineered as light-responsive materials. The co-polymerization of a photoswitch with tetraphenylmethane generated porous networks that provided the free volume for the photoisomerization of the overcrowded alkene [2]. Under UV light irradiation, the quantitative photoisomerization led to structural changes and modulated the CO2 adsorptive properties of the material. The process is reversible by irradiation or heating leading to a cyclable material.
abstract + slide
porous aromatic frameworks; photon upconversion; fluorescent nanoparticles; photoisomerization, molecular motors
English
Materials Chemistry 2020 (Virtual Conference) - Global Virtual Summit on “Advances in Materials, Physics and Chemistry Science” - September 11th & 12th, 2020
2020
Materials Chemistry 2020 - Global Virtual Summit on “Advances in Materials, Physics and Chemistry Science” - September 11th & 12th, 2020
set-2020
2020
2
2
36
37
https://doi.org/10.33263/Proceedings22.036037
open
Perego, J., Bracco, S., Bezuidenhout, C., Comotti, A., Sozzani, P. (2020). Light-Responsive Porous Aromatic Frameworks: Generation of Photon Upconverted Emission and Modulation of Porosity by Bulk Photoisomerization. In Materials Chemistry 2020 - Global Virtual Summit on “Advances in Materials, Physics and Chemistry Science” - September 11th & 12th, 2020 (pp.36-37) [10.33263/Proceedings22.036037].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/291429
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