%0 Electronic Article
%A Basuroy, Krishnayan
%A Velazquez Garcia, Jose
%A Lalithambika, Sreeju Sreekantan Nair
%A Barman, Argha
%A Reuss, Torben
%A Pompidor, Guillaume
%A Grebentsov, Alexander
%A Akcaalan, Oender
%A Techert, Simone
%T Photoinduced Low Spin to High Spin Transition in a [2x2] Fe(II) Metallogrid: Diode Laser-Pumped Photocrystallography at the P11 Beamline in PETRA III, DESY
%N arXiv:2508.01734
%M PUBDB-2025-03871
%M arXiv:2508.01734
%D 2025
%X We report on the photoinduced spin crossover (SCO) transition from a 2HS-2LS to a 3HS-1LS state in a [2x2] Fe(II) metallogrid complex using molecular crystals with static photocrystallography at a first ever attempt in the beamline P11 of the PETRA III synchrotron, DESY. A class 3B diode laser was used to induce the transition under controlled irradiation conditions. Structural characterization was achieved through single-crystal X-ray diffraction (SCXRD) measurements post-irradiation, revealing significant changes in average Fe-N distances, consistent with SCO behavior. Our experimental setup enables precise alignment necessary for photo-excitation using a class 3B diode laser along with a compact focusing optics. The longest dimension of the combined setup of the diode head and the focusing optics is not more than 32cm. The setup showcasing the utility of a compact diode laser system which can even be conveniently used in synchrotron-based pump-probe photocrystallography experiments for a wide range of molecular crystals.
%K Materials Science (cond-mat.mtrl-sci) (Other)
%K Chemical Physics (physics.chem-ph) (Other)
%K Optics (physics.optics) (Other)
%K FOS: Physical sciences (Other)
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.3204/PUBDB-2025-03871
%U https://bib-pubdb1.desy.de/record/637645