Luminescence and energy transfer processes in fluorescent metal-organic frameworks (MOFs) for photonics

Abstract: 

Metal-Organic Frameworks (MOFs)—hybrid materials composed of metal-oxide clusters connected by organic ligands in a crystalline framework—provide a robust platform for designing  materials in which active struts can perform tailored functions. Synthetic methods based on self- assembly enable precise incorporation of these struts into the porous crystalline architecture, as  well as control over the distances between linkers [1][2]. Thanks to their remarkable versatility, MOFs have found applications in areas such as gas storage [3], catalysis [4], and dynamic materials, and have more recently driven major advancements in the field of luminescent MOFs [5]. This emerging area has given rise to a new class of optically active nanomaterials with tunable electronic properties, suited for use in photonics, optoelectronics, sensing, and biomedicine. MOFs are particularly promising for light-emitting devices due to their structural diversity and tunable emission properties. A major advantage lies in the ability to precisely design their framework composition and architecture, which in turn governs their optical and energy-transport characteristics—key features for applications  involving site-specific photoreactions or multi- excitonic processes. As a result, optimized  luminescent MOF nanocrystals represent a compelling new generation of light-emitting materials, with the potential to rival traditional colloidal semiconductor nanocrystals. We will discuss the fundamental photophysical properties and energy transfer mechanisms that determine the emission behavior of MOFs based on fluorescent conjugated ligands. We place particular emphasis on non-radiative energy transfer processes, which govern energy diffusion within these hybrid crystalline materials [6], and provide guidelines for engineering MOF compositions to achieve highly luminous systems for real-world applications [7].

References:

[1] Yaghi, O. M. et al. Nature 423, 705–714 (2003).
[2] Zhou, H.-C. J. & Kitagawa, S. Chem. Soc. Rev. 43, 5415–5418 (2014).
[3] Siegelman, R. L., Kim, E. J. & Long, J. R. Nat. Mater. 20, 1060–1072 (2021).
[4] Bavykina, A. et al. Chem. Rev. 120, 8468–8535 (2020).
[5] Yin, H.-Q. & Yin, X.-B. Acc. Chem. Res. 53, 485–495 (2020).
[6] Perego, J.; Bezuidenhout, Charl X.; et al. Nat. Commun. 13, 3504 (2022).
[7] Orfano, M.; Perego, J.; et al. Nat. Photon. 17, 672- 678 (2023).

Short biography:

From 2019, Angelo Monguzzi serves as Associate Professor in Experimental Physics at Department of Materials Science. His research is focused on the development of advanced hybrid functional nanomaterials for applications in photonics and theranostics in collaboration with several national and international universities and research institutes. Its experimental activity is centered on CW and ultrafast TR-PL photoluminescence and scintillation spectroscopy, transient absorption spectroscopy, confocal imaging, IR and FT-IR spectroscopy to tackle both fundamental and applicative aspects aimed at the development of materials to implemented real-world technologies.

To get an assistance certificate for this seminar, please, register here and sign the assistance form during the seminar. Certificates will not be issued to those who have not registered via the registration link.
Registration link: https://docs.google.com/forms/d/e/1FAIpQLSdwmTPiOqU-aui0J1YmF9MAwR6J26Vhm4EZ-MQVX5Yvzim4UQ/viewform?usp=header