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

Hyocheon Kweon; Kyu Won Lee; Cheol Eui Lee

doi:10.1016/j.ssc.2012.03.005

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

Hyocheon Kweon, Kyu Won Lee, Cheol Eui Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Alkyl-chain dynamics in the mixed-valent dodecylamine-intercalated vanadium oxide nanosheets (C12VONS) was investigated by means of 400-MHz ¹H 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.

Original language	English
Pages (from-to)	1052-1056
Number of pages	5
Journal	Solid State Communications
Volume	152
Issue number	12
DOIs	https://doi.org/10.1016/j.ssc.2012.03.005
Publication status	Published - 2012 Jun

Keywords

A. Mixed-valent dodecylamine-intercalated vanadium oxide nanosheets
D. Alkyl-chain dynamics
D. Phase transition
E. Nuclear magnetic resonance

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2012.03.005

Cite this

@article{e6e9ee9d0d224d32ad709cadd2f83651,

title = "1H nuclear magnetic resonance study of mixed-valent dodecylamine-intercalated vanadium oxide nanosheets",

abstract = "Alkyl-chain dynamics in the mixed-valent dodecylamine-intercalated vanadium oxide nanosheets (C12VONS) was investigated by means of 400-MHz 1H 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.",

keywords = "A. Mixed-valent dodecylamine-intercalated vanadium oxide nanosheets, D. Alkyl-chain dynamics, D. Phase transition, E. Nuclear magnetic resonance",

author = "Hyocheon Kweon and Lee, {Kyu Won} and Lee, {Cheol Eui}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRL Program 2011-0018628 , No. 20100-029418 , and Cyclotron Users Program). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.",

year = "2012",

month = jun,

doi = "10.1016/j.ssc.2012.03.005",

language = "English",

volume = "152",

pages = "1052--1056",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "12",

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TY - JOUR

T1 - 1H nuclear magnetic resonance study of mixed-valent dodecylamine-intercalated vanadium oxide nanosheets

AU - Kweon, Hyocheon

AU - Lee, Kyu Won

AU - Lee, Cheol Eui

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRL Program 2011-0018628 , No. 20100-029418 , and Cyclotron Users Program). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

PY - 2012/6

Y1 - 2012/6

N2 - Alkyl-chain dynamics in the mixed-valent dodecylamine-intercalated vanadium oxide nanosheets (C12VONS) was investigated by means of 400-MHz 1H 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.

AB - Alkyl-chain dynamics in the mixed-valent dodecylamine-intercalated vanadium oxide nanosheets (C12VONS) was investigated by means of 400-MHz 1H 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.

KW - A. Mixed-valent dodecylamine-intercalated vanadium oxide nanosheets

KW - D. Alkyl-chain dynamics

KW - D. Phase transition

KW - E. Nuclear magnetic resonance

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U2 - 10.1016/j.ssc.2012.03.005

DO - 10.1016/j.ssc.2012.03.005

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JO - Solid State Communications

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