The conditions for the photogeneration of NO linkage isomers at room temperature are studied. By pulsed laser irradiation in the blue spectral range, the long-lived Ru-ON isomer can be generated at room temperature, which is crucial for potential applications, such as holography and data storage. By using static and time-resolved spectroscopy (UV/Vis and IR), we give evidence that the liftime of the Ru-(η2 -(NO)) isomer is a decisive parameter for the formation of the Ru-ON isomer at high temperature owing to a two-step isomerization mechanism Ru-NO→Ru-(η2 -(NO))→Ru-ON. Furthermore, we report the low-temperature structures for each isomer, which were revealed by photocrystallography.
Keywords: UV/Vis spectroscopy; nitrosyl; photochemistry; photocrystallography; ruthenium.
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