Zn-MOFs containing flexible α,ω-alkane (or alkene)-dicarboxylates with 1,2-bis(4-pyridyl)ethylene: comparison with Zn-MOFs containing 1,2-bis(4-pyridyl)ethane ligands
- Author(s)
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Kim, Hyun-Chul, Hur, Seong, Kim, Jin Yeong, Moon, Hoi Ri, Lee, Do Nam, Kim, Youngmee
- Issued Date
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2017-01
- DOI
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10.1039/C6CE02122K
- URI
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https://scholarworks.unist.ac.kr/handle/201301/21082
- Fulltext
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http://pubs.rsc.org/en/Content/ArticleLanding/2017/CE/C6CE02122K#!divAbstract
- Citation
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CRYSTENGCOMM, v.19, no.1, pp.99 - 109
- Abstract
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Flexible ditopic alpha,omega-alkane (or alkene)-dicarboxylate bridging ligands provided the following six Zn-MOFs with a 1,2-bis.4-pyridyl) ethylene (bpe) pillar (malonate (1-bpe), succinate (2-bpe), fumarate (3-bpe), glutarate (4-bpe), adipate (5-bpe), and muconate (6-bpe)). Newly-prepared 5-bpe and 6-bpe were structurally characterized. Both 3-bpe and 6-bpe formed three-dimensional (3-D), diamond-like frameworks with a 4-connected uninodal net and a Schlafli symbol of 6(6). By contrast, 5-bpe formed a 3-D framework of a 6-connected uninodal net with a Schlafli symbol of 4(12).6(3). 2-bpe formed a 2-D framework with a 4-connected uninodal net with a Schlafli symbol of 4(4).6(2). 3-bpe and 6-bpe showed potential void spaces after solvent removal. Gas sorption analysis with N-2, H-2, and CO2 at a suitable temperature indicated that 6-bpe was an adsorbent with selectivity for CO2 adsorption at 196 K over N-2 and H-2. The CO2 uptake at 196 K was 86.68 cm(3) g(-1) (3.87 mmol g(-1)). 3-bpe did not exhibit appreciable uptake levels for N-2, H-2, and CO2, which was possibly due to the relatively rigid nonporous activated form of the framework after solvent removal. Both 3-bpe and 6-bpe exhibited a good encapsulating ability for molecular iodine in cyclohexane. The crystal structure of I-2-containing 6-bpe_I-2 was elucidated. A comparison with Zn-MOFs containing 1,2-bis(4-pyridyl) ethane ligands is discussed.
- Publisher
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ROYAL SOC CHEMISTRY
- ISSN
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1466-8033
- Keyword
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METAL-ORGANIC FRAMEWORKS, POROUS COORDINATION POLYMERS, CRYSTAL-STRUCTURES, HYDROGEN STORAGE, VOLATILE IODINE, SINGLE-CRYSTAL, ADSORPTION, CAPTURE, SEPARATION, CONSTRUCTION
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