Hydrogen transfer in hydrogen-bonded chloranilic acid studied by 35Cl NQR I -: a 1:2 complex with 1,4-diazine

被引：30

作者：

Nihei, T

Ishimaru, S

Ishida, H

Ishihara, H

Ikeda, R ^{[1
]}

机构：

[1] Univ Tsukuba, Dept Chem, Tsukuba, Ibaraki 3058571, Japan

[2] Okayama Univ, Fac Sci, Dept Chem, Okayama 7008530, Japan

[3] Saga Univ, Fac Culture & Educ, Dept Chem, Saga 8408502, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 329卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(00)00985-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cl-35 NQR frequencies and spin-lattice relaxation time (T-1Q) and H-1 NMR relaxation times (T-1H) in a H-bonded three molecular system, chloranilic acid-1,4-diazine (1:2) were measured to reveal H-motions in a symmetric two H-bonds in solid. A single Cl-35 NQR frequency observed implies that the time-averaged structure of chloranilic acid is roughly monovalent in accordance with pK(a) values in both acid and base. T-1H temperature dependence was explained by a single relaxation mechanism due to the correlated H-transfer in two H-bonds, while that of T-1Q yielded two relaxation processes. One of these undetected by H-1 NMR was explained by the uncorrelated Ii-transfer. (C) 2000 Elsevier Science B.V.

引用

页码：7 / 14

页数：8