What question did this study set out to answer?

To elucidate the photochemical mechanisms and kinetic pathways governing wavelength-selective bidirectional photoisomerization between norbornadiene and quadricyclane states.

August 25, 2026Journal of the American Chemical SocietyOpen Access

Photocontrolled Isomerization Pathways of Tolylsulfonyl- and Pyrene-Linked Norbornadiene Systems Driven by Absorption Band Targeting

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Authors

DSDazhong Sun DKDaniel Krappmann COChristoph Oleszak

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Overview

Spectroscopic study reveals wavelength-selective bidirectional isomerization in pyrene-linked norbornadiene photoswitches, highlighting pathway engineering strategies for solar energy storage.

Key Points

To elucidate the photochemical mechanisms and kinetic pathways governing wavelength-selective bidirectional photoisomerization between norbornadiene and quadricyclane states.
Engineered tolylsulfonyl-substituted norbornadiene (NBD) hybrids coupled to pyrene chromophores, alongside a symmetric bis-NBD architecture.
Tracked quadricyclane (QC) formation and intermediate dynamics using femtosecond-to-microsecond transient absorption spectroscopy in the deep-UV regime.
Isomerization proceeds via two ultrafast charge-transfer pathways and radical ion pair intermediates, converting charge recombination into productive triplet energy transfer.
Bidirectional switching achieves high quantum yields via chromophore coupling, while the symmetric bis-NBD framework shifts branching toward a triplet-dominated mechanism.
Selective excitation of the QC unit or pyrene chromophore directly steers singlet versus triplet channels to deliver wavelength-dependent reaction control.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/6aacdb9b89fae1c2eb477689 https://doi.org/10.1021/jacs.6c14776

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August 25, 2026Journal of the American Chemical SocietyOpen Access

Photocontrolled Isomerization Pathways of Tolylsulfonyl- and Pyrene-Linked Norbornadiene Systems Driven by Absorption Band Targeting

View Full Paper

Ask AI

Bookmark

Authors

DSDazhong Sun DKDaniel Krappmann COChristoph Oleszak

Discussion

Member takes

Overview

Spectroscopic study reveals wavelength-selective bidirectional isomerization in pyrene-linked norbornadiene photoswitches, highlighting pathway engineering strategies for solar energy storage.

Key Points

To elucidate the photochemical mechanisms and kinetic pathways governing wavelength-selective bidirectional photoisomerization between norbornadiene and quadricyclane states.
Engineered tolylsulfonyl-substituted norbornadiene (NBD) hybrids coupled to pyrene chromophores, alongside a symmetric bis-NBD architecture.
Tracked quadricyclane (QC) formation and intermediate dynamics using femtosecond-to-microsecond transient absorption spectroscopy in the deep-UV regime.
Isomerization proceeds via two ultrafast charge-transfer pathways and radical ion pair intermediates, converting charge recombination into productive triplet energy transfer.
Bidirectional switching achieves high quantum yields via chromophore coupling, while the symmetric bis-NBD framework shifts branching toward a triplet-dominated mechanism.
Selective excitation of the QC unit or pyrene chromophore directly steers singlet versus triplet channels to deliver wavelength-dependent reaction control.

Cite This Study

Sun et al. (2026) studied this question.

synapsesocial.com/papers/6aacdb9b89fae1c2eb477689 https://doi.org/10.1021/jacs.6c14776

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