Investigation of H+ motion in the 21-hydrates of 12-tungstophosphoric and 12-molybdophosphoric acids by ac conductivity and pulsed 1H NMR measurements |
| |
| Authors: | A Hardwick PG Dickens RCT Slade |
| |
| Institution: | Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK;Department of Chemistry, University of Exeter, Stocker Road, Exeter EX4 4QD, UK |
| |
| Abstract: | AC conductivity and 1H NMR relaxation time measurements are reported for the heteropolyacids H3PM12O40. 21H2O (M = W, Mo) over a range of tempereatures.Ambient temperature proton conductivites are ? 1 S m-1, with conductivity activation energies E ? 40 kJ mol-1.The NMR results are interpreted in terms of a range of motional processes leading to distributions of translational correlation times. The behaviour is compared to motions in zeolites and of water sorbed by charcoal. |
| |
| Keywords: | To whom correspondence should be addressed |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
