The Temperature-Dependent Structure of Alkylamines and Their Corresponding Alkylammonium-Alkylcarbamates

被引：38

作者：

Belman, Nataly ^{[1
,2
]}

Israelachvili, Jacob N. ^{[3
,4
]}

Li, Youli ^{[5
]}

Safinya, Cyrus R. ^{[6
,7
]}

Bernstein, Joel ^{[8
]}

Golan, Yuval ^{[1
,2
]}

机构：

[1] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Ilse Katz Inst Nanotechnol, IL-84105 Beer Sheva, Israel

[3] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[5] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA

[6] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[7] Univ Calif Santa Barbara, Dept Mol Cellular & Dev Biol, Santa Barbara, CA 93106 USA

[8] Ben Gurion Univ Negev, Dept Chem, IL-84105 Beer Sheva, Israel

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 25期

基金：

美国国家科学基金会;

关键词：

CHEMICALLY REVERSIBLE ORGANOGELS; LATENT GELATORS; CARBON-DIOXIDE; ALIPHATIC-AMINES; CO2; ABSORBENTS; NANORODS;

D O I：

10.1021/ja902944t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In spite of the wide use of alkylamine (AA) surfactants, little attention has been paid to their spontaneous reactivity in air. Exposure of AA surfactants to CO2 results in the formation of alkylammonium-alkylcarbamate (AAAC) molecular pairs. The effect of hydrocarbon chain length on the reactivity of AAs was followed by monitoring mass gain vs time under atmospheric conditions as well as in a saturated CO2 environment. The rates of conversion to AAAC decreased with hydrocarbon chain length. Indexed powder X-ray diffractograms and the corresponding unit cells are presented for all phases of AAs and AAACs with chain lengths of 14, 16, and 18 carbons. Temperature-resolved powder X-ray diffraction of AAACs indicated anisotropic thermal expansion occurring exclusively along the a direction of the unit cell.

引用

页码：9107 / 9113

页数：7

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