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
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912518081871872 |
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| author | Basuroy, Krishnayan Velazquez-Garcia, Jose de Jesus Lalithambika, Sreeju Sreekantan Nair Barman, Argha Reuss, Torben Pompidor, Guillaume Grebentsov, Alexander Akçaalan, Önder Techert, Simone |
| author_facet | Basuroy, Krishnayan Velazquez-Garcia, Jose de Jesus Lalithambika, Sreeju Sreekantan Nair Barman, Argha Reuss, Torben Pompidor, Guillaume Grebentsov, Alexander Akçaalan, Önder Techert, Simone |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01734 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 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 Basuroy, Krishnayan Velazquez-Garcia, Jose de Jesus Lalithambika, Sreeju Sreekantan Nair Barman, Argha Reuss, Torben Pompidor, Guillaume Grebentsov, Alexander Akçaalan, Önder Techert, Simone Materials Science Chemical Physics Optics 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. |
| title | 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 |
| topic | Materials Science Chemical Physics Optics |
| url | https://arxiv.org/abs/2508.01734 |