Triazatriangulenium (TATA) and trioxatriangulenium (TOTA) ions are among the most efficient systems to mount functional molecules onto atomically flat surfaces such as Au(111). The TATA and TOTA units serve as platforms that absorb onto the surface and form ordered monolayers, while the functional groups are protruding upright and freestanding from the central carbon atoms. Azobenzene derivatized TATA’s are known to exhibit extremely fast cis→trans isomerizations on metal surfaces, via a peculiar non-adiabatic singlet→triplet→singlet mechanism. We now prepared norbornadienes (NBD) and quadricyclanes (QC) attached to TATA and TOTA platforms to check if these accelerated rates and the spin change mechanism also apply to [2+2]cycloreversions (QC→NBD).
Keywords: norbornadiene, quadricyclane, TATA platform, TOTA platform, photochemical isomerization, thermal isomerization, [2+2] cycloaddition, [2+2] cycloreversion
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When a peer-reviewed version of this preprint is available in the Beilstein Journals, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:
Löw, R.; Moje, T.; Röhricht, F.; Herges, R. Beilstein Arch. 2019, 20195. doi:10.3762/bxiv.2019.5.v1
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