Biomedical subjects

C Seel

Publications and source records attributed to C Seel.

4 recordsLinked to original sources

PubMed2000

Templates, "wheeled reagents", and a new route to rotaxanes by anion complexation: the trapping method

The topological aspects of rotaxanes are compared with those of the other families of mechanically interlocked molecules: catenanes and molecular knots. The role of the different types of templates in the well-known threading and clipping procedures often used for rotaxane synthesis are discussed. Finally the conceptually new trapping method that is based on the action of supramolecular nucleophiles formed by anionic stopper-wheel complexes is described.

Journal Article↗

PubMed2000

The Spatial Demand of Dendrimers: Deslipping of Rotaxanes We thank Dr. S. Höger, MPI für Polymerforschung, Mainz, for discussions. This work was supported by the Deutsche Forschungsgemeinschaft (Vo 145/47-1).

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Journal Article↗

PubMed1999

The First Cyclodiasteromeric

A mechanically linked molecule, consisting of an axle and two equivalent wheels, shows an analogous stereochemistry to the classical example tartaric acid. Though the components are not chiral themselves, a (cyclo)diastereomeric species is obtained, the enantiomers (shown schematically) and the meso form of which were completely separated and chiroptically characterized.

Journal Article↗

PubMed1981

[Dark adaptation with intraocular lens implants (author's transl)].

Dark adaptation before and after exposure to bright light was investigated in a total of 129 aphakic and phakic eyes. Aphakic patients whose vision had been corrected with spectacles, contact lenses and intraocular implants were compared with phakic controls. Eyes with implants compared favorably with other optical correction systems; the rapidity of dark adaptation, however, was delayed in pseudophakia after exposure to bright light.

Adult↗