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@ARTICLE{Basuroy:637645,
author = {Basuroy, Krishnayan and Velazquez Garcia, Jose and
Lalithambika, Sreeju Sreekantan Nair and Barman, Argha and
Reuss, Torben and Pompidor, Guillaume and Grebentsov,
Alexander and Akcaalan, Oender and Techert, Simone},
title = {{P}hotoinduced {L}ow {S}pin to {H}igh {S}pin {T}ransition
in a [2x2] {F}e({II}) {M}etallogrid: {D}iode
{L}aser-{P}umped {P}hotocrystallography at the {P}11
{B}eamline in {PETRA} {III}, {DESY}},
reportid = {PUBDB-2025-03871, arXiv:2508.01734},
year = {2025},
abstract = {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.},
keywords = {Materials Science (cond-mat.mtrl-sci) (Other) / Chemical
Physics (physics.chem-ph) (Other) / Optics (physics.optics)
(Other) / FOS: Physical sciences (Other)},
cin = {FS-SCS},
cid = {I:(DE-H253)FS-SCS-20131031},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20231431
(I-20231431)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20231431},
experiment = {EXP:(DE-H253)P-P11-20150101},
typ = {PUB:(DE-HGF)25},
eprint = {2508.01734},
howpublished = {arXiv:2508.01734},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2508.01734;\%\%$},
doi = {10.3204/PUBDB-2025-03871},
url = {https://bib-pubdb1.desy.de/record/637645},
}