About Aarhus University
Direct Spectroscopic Evidence of the Mechanism behind the Phase Transition of [2,2]-Paracyclophane
Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
DOI
- https://doi.org/10.1002/chem.201405948
Final published version
- Hilke Wolf, Univ Gottingen, University of Gottingen, Inst Anorgan Chem ,
- Nina Lock
- Stewart F. Parker, STFC Rutherford Appleton Lab, STFC Rutherford Appleton Laboratory, ISIS Facil ,
- Dietmar Stalke, Univ Gottingen, University of Gottingen, Inst Anorgan Chem
[2,2]-Paracyclophane undergoes phase transitions at 45 and 60K. Based on simultaneous Raman spectroscopy and inelastic neutron scattering experiments (12-70K), it was shown that a twisting motion of the ethylene bridge perpendicular to the plane of the aromatic rings drives the phase transition. The low-temperature (60K) conformers only differ by this twisting motion, which freezes out below 45K and is thermally averaged above 60K. Between 45 and 60K, the system gains energy until the phase transition is complete.
| Original language | English |
|---|---|
| Journal | Chemistry: A European Journal |
| Volume | 21 |
| Issue | 12 |
| Pages (from-to) | 4556-4560 |
| Number of pages | 5 |
| ISSN | 0947-6539 |
| DOIs | |
| Publication status | Published - 16 Mar 2015 |
- inelastic neutron scattering, non-destructive phase transition, paracyclophane, Raman spectroscopy, structure determination, NORMAL HARMONIC VIBRATIONS, MOLECULAR DISTORTIONS, ELECTRONIC-SPECTRUM, CYCLOPHANES, <2.2>PARACYCLOPHANE, CHEMISTRY, CRYSTAL
Research areas
See relations at Aarhus University Citationformats
ID: 97983985