Interlocked Porphyrin Switches
| Autor: | Ruud G. E. Coumans, Roeland J. M. Nolte, Johannes A. A. W. Elemans, Alan E. Rowan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Olefin fiber
Chemical substance Rotaxane 010405 organic chemistry Chemistry Stereochemistry Scanning Probe Microscopy Molecular Materials Organic Chemistry Catenane Viologen General Chemistry Nuclear magnetic resonance spectroscopy 010402 general chemistry Mechanically interlocked molecular architectures 01 natural sciences Porphyrin Catalysis 0104 chemical sciences chemistry.chemical_compound Crystallography ComputingMethodologies_DOCUMENTANDTEXTPROCESSING medicine Physical Organic Chemistry medicine.drug |
| Zdroj: | Chemistry : a European Journal, 19, 24, pp. 7758-7770 Chemistry-A European Journal Chemistry : a European Journal, 19, 7758-7770 |
| ISSN: | 0947-6539 |
| DOI: | 10.1002/chem.201203983 |
| Popis: | We describe the synthesis of a series of interlocked structures from porphyrin-glycoluril cage compounds and bis(olefin)-terminated viologens by an olefin-metathesis protocol. The length of the chain connecting the olefin substituents with the viologen has a marked effect on the products of the ring-closure reaction. Long chains give [2]- and [3]catenane structures, whereas short chains give a mixture of [3]-, [4]-, and [5]catenanes. For comparison several [2]rotaxane compounds were prepared. The interlocked catenane and rotaxane structures display switching behavior, which can be controlled by the addition of acid and base. The kinetic and thermodynamic parameters of the switching processes have been determined by NMR spectroscopy. |
| Databáze: | OpenAIRE |
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