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Super-resolution femtosecond electron diffraction reveals electronic and nuclear dynamics at conical intersections
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Super-resolution femtosecond electron diffraction reveals electronic and nuclear dynamics at conical intersections
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Journal Article
Super-resolution femtosecond electron diffraction reveals electronic and nuclear dynamics at conical intersections
2025
Overview
Conical intersections play a pivotal role in excited-state quantum dynamics. Capturing transient molecular structures near conical intersections remains challenging due to the rapid timescales and subtle structural changes involved. We overcome this by combining the enhanced temporal resolution of mega-electron-volt ultrafast electron diffraction with a super-resolution real-space inversion algorithm, enabling visualization of nuclear and electronic motions at conical intersections with sub-angstrom resolution, surpassing the diffraction limit. We apply this technique to the textbook example of the ring-opening reaction of 1,3-cyclohexadiene, which proceeds through two conical intersections within 100 femtoseconds. The super-resolved transient structures near conical intersections reveal a C-C bond length difference of less than 0.4 Å and an approximately 30-femtosecond traversal time of the nuclear wave packet between them. These findings establish super-resolution ultrafast scattering as a transformative tool for uncovering quantum dynamics in molecules and open new avenues for studying light-matter interactions at the most fundamental level.
Ultrafast electron diffraction can probe structural dynamics of photochemical reactions in real space and real time. Here the authors study the ring-opening of cyclohexadiene with sub-100 fs temporal resolution and sub-angstrom spatial resolution.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
