Multistate Switches: Ruthenium Alkynyl-Dihydroazulene/Vinylheptafulvene Conjugates
| Autor: | Christian R. Parker, Alexandru Vlasceanu, Thorbjørn J. Morsing, Anders Kadziola, Martyn Jevric, Cecilie Lindholm Andersen, Søren Lindbæk Broman, Mogens Brøndsted Nielsen, Ole Hammerich |
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| Rok vydání: | 2016 |
| Předmět: |
Molecular switch
Photoswitch 010405 organic chemistry Organic Chemistry chemistry.chemical_element Molecular electronics Protonation General Chemistry 010402 general chemistry Photochemistry 01 natural sciences Catalysis 0104 chemical sciences Ruthenium Metal Photochromism chemistry visual_art visual_art.visual_art_medium Group 2 organometallic chemistry |
| Zdroj: | Chemistry (Weinheim an der Bergstrasse, Germany). 22(22) |
| ISSN: | 1521-3765 |
| Popis: | Multimode molecular switches incorporating distinct and independently addressable functional components have potential applications as advanced switches and logic gates for molecular electronics and memory storage devices. Herein, we describe the synthesis and characterization of four switches based on the dihydroazulene/vinylheptafulvene (DHA/VHF) photo/thermoswitch pair functionalized with the ruthenium-based Cp*(dppe)Ru ([Ru*]) metal complex (dppe=1,2-bis(diphenylphosphino)ethane; Cp*=pentamethylcyclopentadienyl). The [Ru*]-DHA conjugates can potentially exist in six different states accessible by alternation between DHA/VHF, Ru(II) /Ru(III) , and alkynyl/vinylidene, which can be individually stimulated by using light/heat, oxidation/reduction, and acid/base. Access to the full range of states was found to be strongly dependent on the electronic communication between the metal center and the organic photoswitch in these [Ru*]-DHA conjugates. Detailed electrochemical, spectroscopic (UV/Vis, IR, NMR), and X-ray crystallographic studies indeed reveal significant electronic interactions between the two moieties. When in direct conjugation, the ruthenium metal center was found to quench the photochemical ring-opening of DHA, which in one case could be restored by protonation or oxidation, allowing conversion to the VHF state. |
| Databáze: | OpenAIRE |
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