Engineering Porous Organic Cage Crystals with Increased Acid Gas Resistance

被引：32

作者：

Zhu, Guanghui ^{[1
]}

Hoffman, Christopher D. ^{[1
]}

Liu, Yang ^{[1
]}

Bhattacharyya, Souryadeep ^{[1
]}

Tumuluri, Uma ^{[2
,3
]}

Jue, Melinda L. ^{[1
]}

Wu, Zili ^{[2
,3
]}

Sholl, David S. ^{[1
]}

Nair, Sankar ^{[1
]}

Jones, Christopher W. ^{[1
]}

Lively, Ryan P. ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr NW, Atlanta, GA 30332 USA

[2] Oak Ridge Natl Lab, Div Chem Sci, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2016年 / 22卷 / 31期

关键词：

acid gas interactions; cage compounds; grain boundaries; microporous materials; sulfur dioxide; HIGH SELECTIVITY; LIQUIDS; SEPARATION; MOLECULES; CO2;

D O I：

10.1002/chem.201601659

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Both known and new CC3-based porous organic cages are prepared and exposed to acidic SO2 in vapor and liquid conditions. Distinct differences in the stability of the CC3 cages exist depending on the chirality of the diamine linkers used. The acid catalyzed CC3 degradation mechanism is probed via in situ IR and a degradation pathway is proposed and supported with computational results. CC3 crystals synthesized with racemic mixtures of diaminocyclohexane exhibited enhanced stability compared to CC3-R and CC3-S. Confocal fluorescent microscope images reveal that the stability difference in CC3 species originates from an abundance of mesoporous grain boundaries in CC3-R and CC3-S, allowing facile access of aqueous SO2 throughout the crystal, promoting decomposition. These grain boundaries are absent from CC3 crystals made with racemic linkers.

引用

页码：10743 / 10747

页数：5

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