Molecular motor-functionalized porphyrin macrocycles

International audienceMolecular motors and switches change conformation under the influence of an external stimulus, e.g. light. They can be incorporated into functional systems, allowing the construction of adaptive materials and switchable catalysts. Here, we present two molecular motor-functionalized porphyrin macrocycles for future photo-switchable catalysis. They display helical, planar and point chirality, and are diastereomers, which differ in the relativeorientation of the motor and macrocyclic components. Fluorescence, UV-vis, and 1H NMR experiments reveal that the motor-functionalized macrocycles can bind and thread different variants of viologen guests, including a one-side blocked polymeric one of 30 repeat units. The latter feature indicates that the motor systems can find the open end of a polymer chain, thread on it, and move along the chain to eventually bind at the viologen trap, opening possibilities for catalytic writing on single polymer chains via chemical routes

Self-Assembly of Covalently Linked Porphyrin Dimers at the Solid-Liquid Interface

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Synthesis and physical properties of a porphyrin cavity based on glycoluril

The synthesis, conformational behavior and binding properties of a porphyrin host based on glycoluril are described. In solution it exists as a mixture of three slowly exchanging conformers, of which the populations can be controlled by temperature. The receptor binds potassium ions and methyl viologen by an induced-fit mechanism

Aerobic Epoxidation of Low-Molecular-Weight and Polymeric Olefins by a Supramolecular Manganese Porphyrin Catalyst

Contains fulltext : 201837.pdf (publisher's version ) (Open Access)10 p

Cofactor Controlled Encapsulation of a Rhodium Hydroformylation Catalyst

Contains fulltext : 201676.pdf (publisher's version ) (Open Access

Direct Synthesis of Chiral Porphyrin Macrocyclic Receptors via Regioselective Nitration

Contains fulltext : 198274.pdf (publisher's version ) (Open Access

Enantioselective synthesis of chiral porphyrin macrocyclic hosts and kinetic enantiorecognition of viologen guests

Contains fulltext : 231394.pdf (publisher's version ) (Open Access