5 years ago

Metallo-Supramolecular Gels that are Photocleavable with Visible and Near-Infrared Irradiation

Metallo-Supramolecular Gels that are Photocleavable with Visible and Near-Infrared Irradiation
Aitziber Iturmendi, Uwe Monkowius, Markus Lunzer, Sabrina Theis, Christian Gorsche, Robert Liska, Aleksandr Ovsianikov, Marco Orthofer, Stefan Baudis, Ian Teasdale
A photolabile ruthenium-based complex, [Ru(bpy)2(4AMP)2](PF6)2, (4AMP=4-(aminomethyl)pyridine) is incorporated into polyurea organo- and hydrogels via the reactive amine moieties on the photocleavable 4AMP ligands. While showing long-term stability in the dark, cleavage of the pyridine–ruthenium bond upon irradiation with visible or near-infrared irradiation (in a two-photon process) leads to rapid de-gelation of the supramolecular gels, thus enabling spatiotemporal micropatterning by photomasking or pulsed NIR-laser irradiation Light as a liquidizer: Supramolecular ruthenium-based metallopolymer hydrogels undergo photocleavage and rapid de-gelation upon irradiation with visible and NIR light. They are stabile in the dark or in the absence of solvents.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201707321

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