NMR studies of structure and ferroelectricity for Rochelle salt nanoparticles embedded in mesoporoussieves

Cheng Tien, E. V. Charnaya, Min-Kai Lee, S. V. Baryshnikov, D. Michel, W. Böhlmann

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

NMR studies were carried out for Rochelle salt embedded in molecular sieves. 23Na magic angle spinning (MAS) and multiple quantum (MQ) MAS NMR spectra revealed a complex structure of the confined crystalline material. The major part of particles within nanopores had a structure similar to that of bulk Rochelle salt. The 23Na spin-lattice relaxation times at various temperatures associated with this modification were also similar to those for bulk Rochelle salt and showed broad minima that corresponded to the ferroelectric and re-entrant phase transitions under nanoconfinement at temperatures just below the relevant transitions in bulk. This result suggests that the bulk-like modification within pores is ferroelectric in between. Fast spin relaxation in the rest of the confined material reflected high molecular mobility.

Original languageEnglish
Article number215205
JournalJournal of Physics Condensed Matter
Volume20
Issue number21
DOIs
Publication statusPublished - 2008 Dec 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Science(all)

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