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Title: Selective Carbon Dioxide Adsorption by Two Robust Microporous Coordination Polymers

Journal Article · · Inorganic Chemistry
 [1];  [2];  [3];  [2];  [2];  [2]; ORCiD logo [2]
  1. Huaiyin Normal Univ.,(China). Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, College of Chemistry and Chemical Engineering; Rutgers Univ., New Brunswick, NJ (United States). Dept. of Chemistry and Chemical Biology
  2. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Chemistry and Chemical Biology
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

In the present work we report the design, synthesis, crystal structure determination, and adsorption properties of two new cadmium-based porous coordination polymers, [Cd(pda)0.5(spiro-4-py)0.5(HCOO)]•2H2O•DMF (compound 1, pda = p-phenylenediacetate, spiro- 4-py = (2,2’,7,7’-tetra(pyridin-4-yl)-9,9’-spirobi[fluorene], DMF = N,N’-dimethylformamide) and [Cd2(pda)(spiro-4-py)(CH3COO)2]•DMA (compound 2, DMA = N,N’-dimethylacetamide) with similar structures. The coordination between cadmium and two organic linkers, pda and spiro-4-py, has yielded two-dimensional frameworks with rhombic openings. Stacking of these two-dimensional networks does not block the openings but rather results in permanent porosity with one-dimensional channels in the final structures. The permanent porosity of these compounds is confirmed by gas adsorption measurements. Compounds 1 and 2 have BET (Brunauer-Emmett-Teller) surface areas of 687 and 584 m2/g, respectively. Both compounds show favorable adsorption towards carbon dioxide over other light gases such as nitrogen, oxygen, and carbon monoxide. IAST (Ideal adsorbed solution theory) is employed to predict the adsorption selectivity of binary gas mixtures. Though compounds 1 and 2 possess similar structures, differences are observed in their gas adsorption behaviors, which can be attributed to their different terminal ligands of formate and acetate, respectively. Strikingly, both compounds show exceptionally high stability in aqueous media with a wide pH range, a characteristic that is highly desirable for gas separation-related applications. The robustness of these structures suggests that the use of hydrophobic spiro based multipyridine ligands can lead to water stable frameworks built on late-transition metals that are otherwise sensitive to moisture.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation of Jiangsu Provincial Department of Education
Grant/Contract Number:
FG02-08ER-46491; 12KJD150002; 15KJA150003; 21375044; 51602118
OSTI ID:
1459900
Journal Information:
Inorganic Chemistry, Vol. 55, Issue 24; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (6)

Five complexes based on a new racemic tetraoxaspiro ligand: correlation of potential coordination preferences with the structure, magnetic properties and luminescence properties journal January 2019
9,9′-Spirobifluorene based zinc coordination polymers: a study on linker geometry and topology journal January 2020
Construction of a 3D porous Co( ii ) metal–organic framework (MOF) with Lewis acidic metal sites exhibiting selective CO 2 capture and conversion under mild conditions journal January 2019
Construction of 3D lanthanide based MOFs with pores decorated with basic imidazole groups for selective capture and chemical fixation of CO 2 journal January 2020
Synthesis and solvent vapor-induced transformations of crystals of 1D coordination polymers assembled with continuous void space journal January 2017
A two-dimensional porous framework: solvent-induced structural transformation and selective adsorption towards malachite green journal January 2017


Figures / Tables (6)


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