13C Chemical Shifts of Propane Molecules Encaged in Structure II Clathrate Hydrate

被引：15

作者：

Kida, Masato ^{[1
]}

Hori, Akira ^{[2
]}

Sakagami, Hirotoshi ^{[2
]}

Takeya, Satoshi ^{[3
]}

Kamata, Yasushi ^{[1
]}

Takahashi, Nobuo ^{[2
]}

Ebinuma, Takao ^{[1
]}

Narita, Hideo ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Methane Hydrate Res Ctr, Toyohira Ku, Sapporo, Hokkaido 0628517, Japan

[2] Kitami Inst Technol, Kitami, Hokkaido 0908507, Japan

[3] Natl Inst Adv Ind Sci & Technol, RIIF, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2011年 / 115卷 / 05期

关键词：

GAS HYDRATE; CASCADIA MARGIN; METHANE; NMR; ETHANE; GULF; TEMPERATURE; MIXTURES; KINETICS; MODELS;

D O I：

10.1021/jp106115d

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：

Experimental NMR measurements for C-13 chemical shifts of propane molecules encaged in 16-hedral cages of structure II clathrate hydrate were conducted to investigate the effects of guest-host interaction of pure propane clathrate on the C-13 chemical shifts of propane guests. Experimental C-13 NMR measurerments revealed that the clathrate hydration of propane reverses the C-13 chemical shifts of methyl and methylene carbons in propane guests to gaseous propane at room temperature and atmospheric pressure or isolated propane, suggesting a change in magnetic environment around the propane guest by the clathrate hydration. Inversion of the C-13 chemical shifts of propane clathrate suggests that the deshielding effect of the water cage on the methyl carbons of the propane molecule encaged in the 16-hedral cage is greater than that on its methylene carbon.

引用

页码：643 / 647

页数：5

共 35 条

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