High Dielectric Constant and Relaxation Mechanism of Water with Hydrated Copper(II) Ions in a Cucurbituril-Based Supramolecular Architecture
Bokov, Alexei A.
- 化学化工－已发表论文 
The dielectric properties of water confined in nanochannels of a cucurbituril-based supramolecular architecture containing water and hydrated copper(H) ions were investigated in the frequency range of 10(2) to 5 X 10(7) Hz at various temperatures around room temperature. Two relaxation processes were revealed and studied. The low frequency dispersion described by the fractional power law is related to the relaxation of hopping charge carriers. The second orientational polarization contribution follows the Kohlrausch-Williams-Watts relaxation law with the characteristic relaxation time almost independent of temperature and gives rise to an exceptionally large static dielectric constant (similar to 500). The data suggest the existence of a third relaxation process with the characteristic frequency significantly larger than the measurement frequencies used in this work.
CitationJOURNAL OF PHYSICAL CHEMISTRY C,2012,116（27）：14199-14204