Mechanically induced cis-to-trans isomerization of carbon–carbon double bonds using atomic force microscopy
| Autor: | Andreas F. M. Kilbinger, Michal Borkovec, Plinio Maroni, Mark Schäfer, Phally Kong, Milad Radiom |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Double bond Relaxation (NMR) Force spectroscopy General Physics and Astronomy 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallography chemistry ddc:540 Molecule Single bond Physical and Theoretical Chemistry 0210 nano-technology Isomerization Cis–trans isomerism |
| Zdroj: | Physical Chemistry Chemical Physics, Vol. 18, No 45 (2016) pp. 31202-31210 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/c6cp05696b |
| Popis: | Cis-to-trans isomerization of carbon–carbon double bonds can be induced by the application of mechanical force. Using single molecule force spectroscopy by means of atomic force microscopy (AFM) we pulled polymer molecules which contained cis double bonds in the backbone. In the force versus extension profiles of these polymers, a sudden extension increase is observed which is due to the conversion of shorter cis isomers into longer trans isomers. The added length to the polymer results in relaxation in probed force. We find that the isomerization occurs at forces of 800 ± 60 pN, independent of AFM tip and solid substrate chemistries. Investigation of similar polymers which exclusively contained single bonds in the backbone showed no evidence of a similar transition. |
| Databáze: | OpenAIRE |
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