What question did this study set out to answer?

To investigate whether embedding photochromic switches within light-harvesting metal–organic frameworks enables wavelength-selective control over energy and charge transfer pathways to steer catalytic chemical reactions.

May 30, 2025Journal of the American Chemical Society

Shifting Gears: Photochromic Metal–Organic Frameworks with Stimulus-Adaptable Performance

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Authors

JHJohanna Haimerl GTGrace C. Thaggard BKBuddhima K. P. Maldeni Kankanamalage

Discussion

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Overview

Mechanistic study reveals wavelength-dependent energy and charge transfer switching in photochromic metal-organic frameworks, highlighting a route to stimulus-controlled room-temperature catalysis.

Key Points

To investigate whether embedding photochromic switches within light-harvesting metal–organic frameworks enables wavelength-selective control over energy and charge transfer pathways to steer catalytic chemical reactions.
Hierarchically incorporated organic chromophores and sterically demanding spiropyran photochromic units into a porous, light-harvesting metal–organic framework matrix.
Assessed matrix effects on photoisomerization kinetics and excited-state photophysical pathways using spectroscopic analysis under visible light irradiation.
Tested photoswitch-guided reaction selectivity using a model phosphinylation reaction at room temperature without metal node participation or external co-catalysts.
Observed the first visible light-induced photoisomerization of a framework-confined spiropyran derivative, which effectively suppressed charge transfer in favor of resonance energy transfer pathways.
Demonstrated that shifting excitation wavelengths reconfigures internal relaxation routes, allowing selective tailoring of phosphinylation reaction outcomes mediated exclusively by organic linkers under ambient conditions.

Cite This Study

Haimerl et al. (2025) studied this question.

synapsesocial.com/papers/69da082a0f32475823a3cbcb https://doi.org/10.1021/jacs.5c04466

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May 30, 2025Journal of the American Chemical Society

Shifting Gears: Photochromic Metal–Organic Frameworks with Stimulus-Adaptable Performance

View Full Paper

Ask AI

Bookmark

Authors

JHJohanna Haimerl GTGrace C. Thaggard BKBuddhima K. P. Maldeni Kankanamalage

Discussion

Member takes

Overview

Mechanistic study reveals wavelength-dependent energy and charge transfer switching in photochromic metal-organic frameworks, highlighting a route to stimulus-controlled room-temperature catalysis.

Key Points

To investigate whether embedding photochromic switches within light-harvesting metal–organic frameworks enables wavelength-selective control over energy and charge transfer pathways to steer catalytic chemical reactions.
Hierarchically incorporated organic chromophores and sterically demanding spiropyran photochromic units into a porous, light-harvesting metal–organic framework matrix.
Assessed matrix effects on photoisomerization kinetics and excited-state photophysical pathways using spectroscopic analysis under visible light irradiation.
Tested photoswitch-guided reaction selectivity using a model phosphinylation reaction at room temperature without metal node participation or external co-catalysts.
Observed the first visible light-induced photoisomerization of a framework-confined spiropyran derivative, which effectively suppressed charge transfer in favor of resonance energy transfer pathways.
Demonstrated that shifting excitation wavelengths reconfigures internal relaxation routes, allowing selective tailoring of phosphinylation reaction outcomes mediated exclusively by organic linkers under ambient conditions.

Cite This Study

Haimerl et al. (2025) studied this question.

synapsesocial.com/papers/69da082a0f32475823a3cbcb https://doi.org/10.1021/jacs.5c04466

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