Modulation of the assembly fashion among metal–organic frameworks for enantioretentive epoxide activation

Guo, Jun; Xue, Xiaomin; Li, Fangfang; Zhao, Meiting; Xing, Youcong; Song, Yanmin; Long, Chang; Zhao, Tingting; Liu, Yi; Tang, Zhiyong

doi:10.1039/d3nh00419h

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…Both chiral and achiral (racemic) materials have great application significance, which has been proven many times [43][44][45][46][47][48][49][50]. The influence of adding the racemate to the mixture on the physicochemical properties and helical pitch was confirmed in this study, which aimed to prepare three mixtures containing (S) enantiomers and racemate, examine their mesomorphic and thermodynamic properties and helical pitch, and compare them with the base mixture.…”

Section: Discussionmentioning

confidence: 82%

Properties of Antiferroelectric Mixtures Differing in the Amount of Added Racemate

Urbańska,

Dardas

2024

Crystals

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Novel three-component liquid crystalline mixtures composed of chiral and achiral (racemic) liquid crystalline materials were designed and studied by polarizing optical microscopy, differential scanning calorimetry, and UV–VIS spectroscopy. The compositions of liquid crystalline mixtures were developed based on the composition of a two-component (binary) mixture marked as W-1000 with the following phase sequence: Cr ↔ SmCA* ↔ SmC* ↔ SmA* ↔ Iso. This mixture has an antiferroelectric (SmCA*) phase over a wide temperature range and exhibits a helical pitch inversion in this phase. All newly obtained mixtures occur in a wide temperature range of the SmCA* phase, while the ferroelectric (SmC*) phase and the orthogonal (SmA*) phase occur in a narrow temperature range. The new mixtures also have a very long helical pitch in the antiferroelectric phase and a short helical pitch in the ferroelectric phase.

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Section: Discussionmentioning

confidence: 82%

Properties of Antiferroelectric Mixtures Differing in the Amount of Added Racemate

Urbańska,

Dardas

2024

Crystals

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“…Literature reporting the relationship between polymorphism and catalytic activities is nonetheless rare. One of the few examples is the different catalytic activities of two polymorphic hcp-UiO-66 and fcc-UiO-66 . The better activity of hcp-UiO-66 than fcc-UiO-66 in alcoholysis of styrene oxide was reported to originate from a dissimilar framework assembly.…”

Section: Introductionmentioning

confidence: 99%

“…One of the few examples is the different catalytic activities of two polymorphic hcp-UiO-66 and fcc-UiO-66. 37 The better activity of hcp-UiO-66 than fcc-UiO-66 in alcoholysis of styrene oxide was reported to originate from a dissimilar framework assembly. The other example is the higher electrocatalytic activities of the two-dimensional Co-MOF (CTGU-5) than its polymorphic three-dimensional CTGU-6.…”

Section: Introductionmentioning

confidence: 99%

Polymorphism and Its Influence on Catalytic Activities of Lanthanide–Glutamate–Oxalate Coordination Polymers

Sinchow,

Sraphaengnoi,

Chuasaard

et al. 2024

Inorg. Chem.

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To study the relationship between polymorphism and catalytic activities of lanthanide coordination polymers in the cycloaddition reactions of CO2 with epoxides, the monoclinic and triclinic polymorphs of [LnIII(NH3–Glu)(ox)]·2H2O, where LnIII = LaIII (I), PrIII (II), NdIII (III), SmIII (IV), EuIII (V), GdIII (VI), TbIII (VII), and DyIII (VIII), NH3–Glu– = NH3 + containing glutamate, and ox2– = oxalate, were synthesized and characterized. Factors determining polymorphic preference, the discrepancy between the two polymorphic framework structures, potential acidic and basic sites, thermal and chemical stabilities, active surface areas, void volumes, CO2 sorption/desorption isotherms, and temperature-programmed desorption of NH3 and CO2 are comparatively presented. Based on the cycloaddition of CO2 with epichlorohydrin in the presence of tetrabutylammonium bromide under solvent-free conditions and ambient pressure, catalytic activities of the two polymorphs were evaluated, and the relationship between polymorphism and catalytic performances has been established. Better performances of the monoclinic catalysts have been revealed and rationalized. In addition, the scope of monosubstituted epoxides was experimented and the outstanding performance of the monoclinic catalyst in the cycloaddition reaction of CO2 with allyl glycidyl ether under ambient pressure has been disclosed.

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Enhanced photothermal conversion in 3D stacked metal–organic framework nanosheets

Zhu,

Huang,

et al. 2024

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Incorporating metal nanoparticles (MNPs) in metal–organic frameworks (MOFs) demonstrated great potential in the field of photo‐/photothermal‐catalysis. However, the oriented design and optimization of the 3D nano‐architectures of MOF substrates to achieve high‐efficiency light harvesting remains a challenge. Herein, guided on theoretical simulation, a facile etching strategy was employed to fabricate a 3D orderly‐stacked‐MOF‐nanosheet‐structure (CASFZU‐1) with a high electric field energy‐density‐distribution; well‐dispersed MNPs were afterwards encapsulated onto the MOF support. The unique nanosheet structure improved the light absorbance over the broadband spectrum, thereby enhancing the plasmonic photothermal effects of the MNPs@CASFZU‐1 composites. Based on the plasmon‐driven photothermal conversion, the MNPs@CASFZU‐1 composites exhibited approximately twofold catalytic efficiency in the hydrogenation reaction and a lower temperature for the full conversion of carbon monoxide, compared to their bulk‐type composites. The surface‐plasmon‐driven photothermal effects can be exploited in innovative MNPs@MOF platforms for various applications.

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Modulation of the assembly fashion among metal–organic frameworks for enantioretentive epoxide activation

Abstract: Highly enantioretentive alcoholysis of epoxides is an important way to synthesize enantiopure β-alkoxy alcohols, which are irreplaceable intermediates demanded by biomedicines, fine chemicals and other industries. In this report, we...

Cited by 3 publications

References 42 publications

Properties of Antiferroelectric Mixtures Differing in the Amount of Added Racemate

Properties of Antiferroelectric Mixtures Differing in the Amount of Added Racemate

Polymorphism and Its Influence on Catalytic Activities of Lanthanide–Glutamate–Oxalate Coordination Polymers

Enhanced photothermal conversion in 3D stacked metal–organic framework nanosheets

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