| Autor: |
Simms CH; Department of Chemistry, University of Oxford Chemistry Research Laboratory, Mansfield road, Oxford, OX1 3TA, UK. stephen.faulkner@chem.ox.ac.uk., Nielsen VRM; Nano-Science Centre and Department of Chemistry University of Copenhagen Universitetsparken 5, 2100 København Ø, Denmark., Sørensen TJ; Nano-Science Centre and Department of Chemistry University of Copenhagen Universitetsparken 5, 2100 København Ø, Denmark., Faulkner S; Department of Chemistry, University of Oxford Chemistry Research Laboratory, Mansfield road, Oxford, OX1 3TA, UK. stephen.faulkner@chem.ox.ac.uk., Langton MJ; Department of Chemistry, University of Oxford Chemistry Research Laboratory, Mansfield road, Oxford, OX1 3TA, UK. stephen.faulkner@chem.ox.ac.uk. |
| Abstrakt: |
Optical information storage requires careful control of excitation and emission wavelengths in a reversible and orthogonal manner to enable efficient reading, writing, and erasing of information. Photochromic systems, in which a photoswitch is typcially coupled to an emissive organic fluorophore, have much promise in this regard. However, these suffer from considerable spectral overlap between the switch and fluorophore, such that their emissive and photoswitchable properties are not orthogonal. Here, we overcome this limitation by coupling visible/NIR emissive lanthanide complexes with molecular photoswitches, enabling reversible and orthogonal photoswitching with visible light. Crucially, photoswitching does not lead to sensitised emission from the lanthanide, while excitation of the lanthanide does not induce photoswitching, enabling the state of the system to be probed without perturbation of the switch. This opens up the possibility of developing multi-colour read-write methods for information storage using emissive photoswitches. |
