Unexpected structural/motional mode of water intercalated into an α-crystalline zirconium phosphate deduced by 31P and 2H solid-state MAS NMR spectra
- Texas A & M University, College Station, TX (United States); OSTI
- Texas A & M University, College Station, TX (United States)
Here, in developing the approach to understanding dynamics of intercalates in layered materials, crystalline-layered zirconium phosphate Zr (HPO4)2·0.35D2O has been prepared and characterized by the 1H, 31P, and 2H solid-state MAS NMR spectra, including 31P and 2H T1 measurements. At temperatures >253 K, the intercalated water shows two spectrally-distinguished deuterons unprecedentedly with different DQCC's and 2H T1 times, one of which is hydrogen bonded. The collected data allowed to identify an unexpected bonding/dynamic mode of water molecules, which experience fast rotation around the hydrogen bond, formed with a zirconium-coordinated oxygen. The low-temperature 2H MAS NMR experiments have demonstrated the presence of additional hydrogen bond P—(H)O˙˙˙ DO, population of which grows on cooling to 195 K corresponding to the doubly hydrogen-bonded immobile water molecule.
- Research Organization:
- Texas A & M University, College Station, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Robert A. Welch Foundation
- Grant/Contract Number:
- SC0017864
- OSTI ID:
- 1976359
- Alternate ID(s):
- OSTI ID: 1826628
- Journal Information:
- Magnetic Resonance in Chemistry, Journal Name: Magnetic Resonance in Chemistry Journal Issue: 2 Vol. 60; ISSN 0749-1581
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English