Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 39, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202207467
Keywords
Carbon Capture; Gas Separation; Porous Materials; Reticular Chemistry; Zeolitic Imidazolate Frameworks
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Funding
- Science and Technology Commission of Shanghai Municipality [21XD1402300, 21JC1401700, 21DZ2260400]
- National Natural Science Foundation of China [21522105, 51861145313]
- Alliance of International Science Organizations [ANSO-CR-PP-2020-06]
- Jordan Ministry of Higher Education and Scientific Research [BAS/1/6/2020]
- Saudi Aramco [ORCP 2390]
- KFUPM [CCS-15]
- KACST-TIC on CCS [CCS-15]
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We report the design and synthesis of four new ZIFs with a novel zeolite topology built from 3-rings, using a new design principle. These materials demonstrate selective capture of CO2 and ethane under specific conditions.
Three-membered rings (3-rings) are an important structural motif in zeolite chemistry, but their formation remains serendipitous in reticular chemistry when designing zeolitic imidazolate frameworks (ZIFs). Herein, we report a design principle for constructing four new ZIFs, termed ZIF-1001 to -1004, from tetrahedral Zn-II centers (T), benzotriazolate (bTZ), and different functionalized benzimidazolates (RbIM) that adopt a new zeolite NPO-type topology built from 3-rings. Two factors were critical for this discovery: i) incorporating the bTZ linker within the structures formed 3-rings due to a angle(T-bTZ-T) angle of 120-130 degrees reminiscent of the angle(Ge-O-Ge) angle (130 degrees) observed in germanate zeolite-type structures having 3-rings; and ii) RbIM guided the coordination chemistry of bTZ to bind preferentially in an imidazolate-type mode. This series' ability to selectively capture CO2 from high-humidity flue gas and trap ethane from tail gas during shale gas extraction was demonstrated.
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