Resonance Raman intensity analysis of photoactive metal-organic frameworks

Metal-organic frameworks (MOFs) are promising candidate materials for photo-driven processes. Their crystalline and tunable structure makes them well-suited for placing photoactive molecules at controlled distances and orientations that support processes such as light harvesting and photocatalysis....

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Bibliographic Details
Published in:The Journal of chemical physics 2024-07, Vol.161 (3)
Main Authors: Brennan, Joe, Choi, Tae Hoon, Soilis, Zoe M., Rosi, Nathaniel L., Johnson, J. Karl, Frontiera, Renee
Format: Article
Language:English
Subjects:
Excitation
Luminous intensity
Materials selection
Metal-organic frameworks
Molecular structure
Photoexcitation
Resonance
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Summary:Metal-organic frameworks (MOFs) are promising candidate materials for photo-driven processes. Their crystalline and tunable structure makes them well-suited for placing photoactive molecules at controlled distances and orientations that support processes such as light harvesting and photocatalysis. In order to optimize their performance, it is important to understand how these molecules evolve shortly after photoexcitation. Here, we use resonance Raman intensity analysis (RRIA) to quantify the excited state nuclear distortions of four modified UiO-68 MOFs. We find that stretching vibrations localized on the central ring within the terphenyl linker are most distorted upon interaction with light. We use a combined computational and experimental approach to create a picture of the early excited state structure of the MOFs upon photoactivation. Overall, we show that RRIA is an effective method to probe the excited state structure of photoactive MOFs and can guide the synthesis and optimization of photoactive designs.
ISSN:0021-9606
1089-7690
1089-7690
DOI:10.1063/5.0204383