Univ Sao Paulo, Inst Fis Sao Carlos, BR-13590 Sao Carlos - Brazil
Número total de Afiliações: 2
Tipo de documento:
Journal of Physical Chemistry C;
NOV 28 2013.
Citações Web of Science:
The structure of roller-quenched fast ion conductive glasses (FICs) (Ag3PO4)(x)(AgI)(1-x) (0.15 <= x <= 0.50) is investigated by Ag-109 and P-31 solid-state NMR spectroscopies. Monotonic linear dependences of Ag-109 and P-31 chemical shifts on x are consistent with a statistical distribution of the phosphate and iodide anions. This conclusion is quantitatively confirmed by a new P-31 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. (AU)