1H nuclear magnetic resonance study of mixed-valent dodecylamine-intercalated vanadium oxide nanosheets

被引：0
|
作者：
Kweon, Hyocheon
Lee, Kyu Won
Lee, Cheol Eui [1 ]
机构：
[1] Korea Univ, Dept Phys, Seoul 136713, South Korea
来源：
SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
Mixed-valent dodecylamine-intercalated vanadium oxide nanosheets; Phase transition; Alkyl-chain dynamics; Nuclear magnetic resonance; CRYSTAL-STRUCTURE; CHAIN DYNAMICS; TEMPERATURE; NANOTUBES; V2O5; GELS;
D O I：
10.1016/j.ssc.2012.03.005
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Alkyl-chain dynamics in the mixed-valent dodecylamine-intercalated vanadium oxide nanosheets (C12VONS) was investigated by means of 400-MHz H-1 nuclear magnetic resonance. Two C12VONS samples with distinct alkylammonium-to-alkylamine ratios showed distinct alkyl-chain dynamics, the alkylammonium chains being apparently more disordered than the alkylamine chains. The high-temperature spin-lattice relaxation is dominated by the conformational chain defects and the reorientational motions of the alkyl chains, respectively, in the alkylammonium-abundant system and in the alkylamine-abundant system. The reorientational and conformational changes of the alkyl chains appear to be uncorrelated with the magnetic transitions. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1052 / 1056
页数：5
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