Ethylene/ethane separation in a stable hydrogen-bonded organic framework through a gating mechanism

Yang, Yisi; Li, Libo; Lin, Rui‐Biao; Ye, Yingxiang; Yao, Zizhu; Yang, Ling; Xiang, Fahui; Chen, Shimin; Zhang, Zhang-Jin; Xiang, Shengchang; Chen, Banglin

doi:10.1038/s41557-021-00740-z

Cited by 340 publications

(218 citation statements)

References 49 publications

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“…This benzene molecule binds to surrounding BDP 2− ligands through multiple C–H···X interactions (distances 2.89–3.58 Å): to pyrazolate C–H moieties through C–H(L)···π(B) interactions (L represents BDP 2− ligands and B represents benzene guest molecules), to pyrazolate π-electrons through C–H(B)···π(L) interactions and to pyrazolate nitrogen atoms through C–H(B)···N(L) hydrogen bonds (Fig. 5b and Supplementary Table 3 ) 48 . The other benzene molecule (red) lies over a pair of packed BDP 2− ligands (site II; Fig.…”

Section: Mainmentioning

confidence: 99%

Trace removal of benzene vapour using double-walled metal–dipyrazolate frameworks

et al. 2022

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In principle, porous physisorbents are attractive candidates for the removal of volatile organic compounds such as benzene by virtue of their low energy for the capture and release of this pollutant. Unfortunately, many physisorbents exhibit weak sorbate–sorbent interactions, resulting in poor selectivity and low uptake when volatile organic compounds are present at trace concentrations. Herein, we report that a family of double-walled metal–dipyrazolate frameworks, BUT-53 to BUT-58, exhibit benzene uptakes at 298 K of 2.47–3.28 mmol g−1 at <10 Pa. Breakthrough experiments revealed that BUT-55, a supramolecular isomer of the metal–organic framework Co(BDP) (H2BDP = 1,4-di(1H-pyrazol-4-yl)benzene), captures trace levels of benzene, producing an air stream with benzene content below acceptable limits. Furthermore, BUT-55 can be regenerated with mild heating. Insight into the performance of BUT-55 comes from the crystal structure of the benzene-loaded phase (C6H6@BUT-55) and density functional theory calculations, which reveal that C–H···X interactions drive the tight binding of benzene. Our results demonstrate that BUT-55 is a recyclable physisorbent that exhibits high affinity and adsorption capacity towards benzene, making it a candidate for environmental remediation of benzene-contaminated gas mixtures.

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Section: Mainmentioning

confidence: 99%

Trace removal of benzene vapour using double-walled metal–dipyrazolate frameworks

et al. 2022

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“…56 In addition, intermolecular interactions including C-H•••π may also facilitate maintaining the crystallinities and stabilities. 57 Unfortunately, the intermediate Cu 15b isolated from CH 2 Cl 2 was unstable after being exposed to the air for hours, probably because that low boilingpoint and volatile CH 2 Cl 2 guest weakens the stability of the crystals. 58,59 Page 13 of 26 CCS Chemistry that intermolecular C-H•••π interactions would substantially restrict the molecular rotations or vibrations and thus considerably enhance the radiative transitions in the crystalline state.…”

Section: Beside Two Kinds Of μ 3 Bridging Modes (μmentioning

confidence: 99%

Structural Isomerization in Cu(I) Clusters: Tracing the Cu Thermal Migration Paths and Unveiling the Structure-Dependent Photoluminescence

et al. 2023

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Revealing structural isomerization in metal clusters would bridge huge structural gap between small molecular isomerization and solid-solid phase transformation. However, genuine structural isomerism in metal clusters is still rare. In this work, we report the first example of structural isomerism in Cu clusters. By utilizing the coordination flexibility of alkyne to enable the migration of partial Cu atoms in Cu metal cores, two Cu 15 cluster complexes (Cu 15 -a and Cu 15 -c) possessing identical composition but different metal core structures have been successfully isolated. Interestingly, although the structure of Cu 15 -a can keep retained in CH 2 Cl 2 solution below 27 °C, it will gradually change to give an intermediate state Cu 15 -b as the temperature rises (about 31 °C) before it eventually transforms into Cu 15 -c (40~65 °C). Significantly, atomic precise Cu 15 -b clearly provides insightful footprints for tracing thermal migration process of Cu atoms during the thermal-transformation from

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“…Microporous metal-organic frameworks (MOFs) are a novel class of hybrid functional materials, self-assembled from various organic linkers and metal ions/clusters. The modular nature of MOFs endows them with powerful tunability of pore structure and chemistry, thus popularizing their applications including gas separation [ [5] , [6] , [7] , [8] ], [ [5] , [6] , [7] , [8] ] sensing [ [9] , [10] , [11] , [12] ] and catalysis [ 13 , 14 ]. Particularly, tremendous potentials of MOF materials have been exhibited as drug carriers [ [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] ] since MIL-101 was explored for the first time in 2006 by Ferey and co-workers [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

A nanosized anionic MOF with rich thiadiazole groups for controlled oral drug delivery

Jiang

Cao

et al. 2022

Materials Today Bio

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Controlling the crystal size and surface chemistry of MOF materials, and understanding their multifunctional effect are of great significance for the biomedical applications of MOF systems. Herein, we designed and synthesized a new anionic MOF, ZJU-64-NSN, which features 1D channels decorated with highly polarized thiadiazole groups, and its crystal size could be systematically tuned from 200 μm to 300 nm through a green and simple approach. As a result, the optimal nanosized ZJU-64-NSN is found to enable an ultrafast loading of cationic drug procainamide (PA) (21.2 wt% within 1 min). Moreover, the undesirable chemical stability of PA@ZJU-64-NSN is greatly improved by the surface coating of polyethylene glycol (PEG) biopolymer. The final drug delivery system PEG/PA@ZJU-64-NSN is found to effectively prevent PA from premature release under the harsh stomach environments due to the intense host-guest interaction, and mainly release PA to the targeted intestinal surroundings. Such controlled drug delivery is proved to be triggered by endogenic Na + ions instead of H + ions, well revealed by the study on the dynamics behavior of drug release and UV–Vis absorption spectrum. Good biocompatibility of ZJU-64-NSN and PEG-coated ZJU-64-NSN has been fully demonstrated by MTT assay as well as confocal microscopy imaging.

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Ethylene/ethane separation in a stable hydrogen-bonded organic framework through a gating mechanism

Cited by 340 publications

References 49 publications

Trace removal of benzene vapour using double-walled metal–dipyrazolate frameworks

Trace removal of benzene vapour using double-walled metal–dipyrazolate frameworks

Structural Isomerization in Cu(I) Clusters: Tracing the Cu Thermal Migration Paths and Unveiling the Structure-Dependent Photoluminescence

A nanosized anionic MOF with rich thiadiazole groups for controlled oral drug delivery

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