Artículos de revistas
Anion distribution in superionic Ag3PO4-AgI glasses revealed by dipolar solid-state NMR
Fecha
2013-11Registro en:
Journal of Physical Chemistry C, Washington, DC : American Chemical Society - ACS ,v. 117, n. 47, p. 24746-24751, Nov. 2013
1932-7447
10.1021/jp409307c
Autor
Ren, Jinjun
Eckert, Hellmut
Institución
Resumen
The structure of roller-quenched fast ion conductive glasses (FICs) (Ag3PO4)x(AgI)1-x (0.15 ≤ x ≤ 0.50) is investigated by 109Ag and 31P solid-state NMR spectroscopies. Monotonic linear dependences of 109Ag and 31P chemical shifts on x are consistent with a statistical distribution of the phosphate and iodide anions. This conclusion is quantitatively confirmed by a new 31P homonuclear magnetic dipolar recoupling method, termed double-quantum-based dipolar recoupling effects nuclear alignment reduction (DQ-DRENAR), which numerically proves a random spatial distribution of the phosphate anions. Altogether these results give the final answer to a long-standing debate on the structure of silver in AgI-based (FIC) glasses, proving the absence of previously postulated silver iodide cluster domains.