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Updated: May 15, 2026
Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
Published on: February 7, 2022
On/off photoswitching in a cyanide-bridged {Fe2Co2} magnetic molecular square
Abhishake Mondal1, Yanling Li, Mannan Seuleiman
1Institut Parisien de Chimie Moléculaire (IPCM), UMR 7201, UPMC Paris 6, 4 place Jussieu, 75252 Paris cedex 5, France.
Abstract:
A repeatable bidirectional paramagnetic ↔ diamagnetic photomagnetic effect has been observed in the cyanide-bridged Fe-Co square complex {[Fe{B(pz)(4)}(CN)(3)](2)[Co(bik)(2)](2)}(ClO(4))(2)·3H(2)O [B(pz)(4) = tetrapyrazolylborate, bik = bis(1-methylimidazol-2-yl)ketone]. Magnetic measurements and low-temperature single-crystal X-ray diffraction experiments have shown that a complete electron transfer from the diamagnetic Fe(II)-Co(III) state to the paramagnetic Fe(III)-Co(II) metastable state is induced by 808 nm laser light irradiation, whereas the diamagnetic state is recovered in an almost quantitative yield under irradiation at 532 nm.
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