Following photochromism by NMR: LED modulation of platinum terpyridyl-stilbene complexes A. W. Woodward 1,2 , J. E. Bramham 1 , A. P. Golovanov 1 , L. S. Natrajan 1,2 1 Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK, 2 Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK Modern computing technology is constantly evolving to provide users with an ever faster, more powerful experience. However, this comes at a price of requiring storage for increasingly large amounts of data. One possible workaround for this is the development of high density, 3D optical data storage media. Such materials employ photochromic molecules, which undergo conformation rearrangements when exposed to light. 1 Coupling this concept with multiphoton excitation enables the conversion of precise small volumes of the material that exhibit specific fluorescence readout signals, where sub-micron areas can be individually addressed for read many-write many data storage applications. 2 This work utilises a photo-NMR insert device to irradiate photochrome candidates sample whilst inside an NMR spectrometer, where the excitation wavelengths can be toggled, allowing the conformational rearrangement (here, cis-trans) to be tracked in real-time. 3 A family of terpyridyl-stilbene ligands and their platinum complexes are investigated by one and two-photon techniques, and their application as one and two-photon absorbing photochromes is evaluated. References 1. Irie, M.; Fukaminato, T.; Matsuda, K.; Kobatake, S. Chem. Rev., 2014, 114, 12174-12277 2. Corredor, C. C.; Huang, Z.-L.; Belfield, K. D.; Morales, A. R.; Bondar, M. V. Chem. Mater., 2007, 19, 5165-5173 3. J. E. Bramham, A. P. Golovanov, Commun. Chem. 2022, 5, 90
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