Tunable molecular separation by nanoporous membranes

被引：209

作者：

Wang, Zhengbang ^{[1
]}

Knebel, Alexander ^{[2
]}

Grosjean, Sylvain ^{[3
]}

Wagner, Danny ^{[4
]}

Braese, Stefan ^{[3
,4
,5
]}

Woell, Christof ^{[1
]}

Caro, Juergen ^{[2
]}

Heinke, Lars ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Funct Interfaces IFG, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, Callinstr 3a, D-30167 Hannover, Germany

[3] Karlsruhe Inst Technol, Soft Matter Synth Lab, Inst Biol Interfaces 3, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[4] Karlsruhe Inst Technol, Inst Organ Chem, Fritz Haber Weg 6, D-76131 Karlsruhe, Germany

[5] Karlsruhe Inst Technol, Inst Toxicol & Genet, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

关键词：

METAL-ORGANIC FRAMEWORKS; HYDROGEN SELECTIVITY; CO2; ADSORPTION; VISIBLE-LIGHT; THIN-FILMS; AZOBENZENE; FLUOROAZOBENZENES; ISOMERIZATION; TRANSPORT; GRAPHENE;

D O I：

10.1038/ncomms13872

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Metal-organic frameworks offer tremendous potential for efficient separation of molecular mixtures. Different pore sizes and suitable functionalizations of the framework allow for an adjustment of the static selectivity. Here we report membranes which offer dynamic control of the selectivity by remote signals, thus enabling a continuous adjustment of the permeate flux. This is realized by assembling linkers containing photoresponsive azobenzene-sidegroups into monolithic, crystalline membranes of metal-organic frameworks. The azobenzene moieties can be switched from the trans to the cis configuration and vice versa by irradiation with ultraviolet or visible light, resulting in a substantial modification of the membrane permeability and separation factor. The precise control of the cis: trans azobenzene ratio, for example, by controlled irradiation times or by simultaneous irradiation with ultraviolet and visible light, enables the continuous tuning of the separation. For hydrogen: carbon-dioxide, the separation factor of this smart membrane can be steplessly adjusted between 3 and 8.

引用

页数：7

共 52 条

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[2]

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