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Updated: Dec 23, 2025

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
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Photochromic Free MOF-Based Near-Infrared Optical Switch
Nikita K Kulachenkov1, Dapeng Sun2, Yuri A Mezenov1
1Department of Physics and Engineering, ITMO University, St. Petersburg, 197101, Russia.
Abstract:
We demonstrate herein an all-optical switch based on stimuli-responsive and photochromic-free metal-organic framework (HKUST-1). Ultrafast near-infrared laser pulses stimulate a reversible 0.4 eV blue shift of the absorption band with up to 200 s-1 rate due to dehydration and concomitant shrinking of the structure-forming [Cu2 C4 O8 ] cages of HKUST-1. Such light-induced switching enables the remote modulation of intensities of photoluminescence of single crystals of HKUST-1 as well visible radiation passing through the crystal by 2 order of magnitude. This opens up the possibility of utilyzing stimuli-responsive MOFs for all-optical data processing devices.
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