Gas-induced transformation and expansion of a non-porous organic solid

被引:192
作者
Thallapally, Praveen K. [1 ]
McGrail, B. Peter [1 ]
Dalgarno, Scott J. [2 ]
Schaef, Herbert T. [1 ]
Tian, Jian [2 ]
Atwood, Jerry L. [2 ]
机构
[1] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA
[2] Univ Missouri, Dept Chem, Columbia, MO 65211 USA
关键词
D O I
10.1038/nmat2097
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
Organic solids composed by weak van der Waals forces are attracting considerable attention owing to their potential applications in gas storage, separation and sensor applications(1). Herein we report a gas-induced transformation that remarkably converts the high-density guest-free form of a well-known organic host (p-tert-butylcalix[4] arene) to a low-density form and vice versa(1), a process that would be expected to involve surmounting a considerable energy barrier(2). This transformation occurs despite the fact that the high-density form is devoid of channels or pores(3). Gas molecules seem to diffuse through the non-porous solid into small lattice voids, and initiate the transition to the low-density kinetic form with similar to 10% expansion of the crystalline organic lattice, which corresponds to absorption of CO2 and N2O (refs 4,5). This suggests the possibility of a more general phenomenon that can be exploited to find more porous materials from non-porous organic and metal-organic frameworks that possess void space large enough to accommodate the gas molecules(6-13).
引用
收藏
页码:146 / 150
页数:5
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