Based on coordination modulation to improve the colloidal stability of two-dimensional metal–organic framework

Zhang, Liying; Li, Mengchu; Zhou, Huazhang; Zou, Shuaihan; Lin, Zhihao; Zhao, S. J.; Fan, Fuqiang; Wang, Tieqiang; Zhang, Xuemin; Fu, Yu

doi:10.1016/j.inoche.2023.110542

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Recently, the same team has achieved the synthesis of solution processable 2D CuNDC-M (NDC is 2,6-naphthalenedicarboxylic acid) nanosheets with excellent solution processability by used 6-methoxy-2-naphthoic acid (MNA) as the modulator. [27] Indeed, the selective coordination strategy promotes the development of 2D MOF sols. To date, only a limited number of cases have been reported regarding selective coordination strategies for the preparation of MOF sols consisted of 2D nanosheets.…”

Section: Synthesis Strategy and Mechanismmentioning

confidence: 99%

“…The CuBDC‐MBA‐2 (Molar ratio of MBA to Cu ions is 2) colloidal suspension remained highly stable without aggregation or decomposition for six months, verified by the dynamic light scattering pattern and SEM image (Figure 3(b–c)). Recently, the same team has achieved the synthesis of solution processable 2D CuNDC‐M (NDC is 2,6‐naphthalenedicarboxylic acid) nanosheets with excellent solution processability by used 6‐methoxy‐2‐naphthoic acid (MNA) as the modulator [27] . Indeed, the selective coordination strategy promotes the development of 2D MOF sols.…”

Section: Synthesis Strategy and Mechanismmentioning

confidence: 99%

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Direct Synthesis of Metal–Organic Framework Sols: Advances and Perspectives

Xie,

Yuan,

2023

Chemistry An Asian Journal

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The intrinsic lack of processability in the conventional nano/microcrystalline powder form of metal‐organic frameworks (MOFs) greatly limits their application in various fields. Synthesis of MOFs with certain flowability make them promising for multitudinous applications. The direct synthesis strategy represents one of the simplest and efficient method for synthesizing solution processable MOF sols/suspensions, compared with other approaches, for instance, the post‐synthesis surface modification, the direct dispersion of MOFs in hindered ionic liquids, as well as the calcination method toward a few MOFs with melting behavior. This article reviews the recent direct synthesis strategies of solution processable MOF sols and their typical applications in different fields. The direct synthesis strategies of MOF sols can be classified into two categories: particle size reduction strategy, and selective coordination strategy. The synthesis mechanism of different strategies and the factors affecting the formation of sols are summarized. The application of solution processable MOF sols in different fields are introduced, showing great application potentials. Furthermore, the challenges faced by the direct synthesis of MOF sols and the main methods to deal with the challenges are emphasized, and the future development trend is prospected.

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Section: Synthesis Strategy and Mechanismmentioning

confidence: 99%

Section: Synthesis Strategy and Mechanismmentioning

confidence: 99%

Direct Synthesis of Metal–Organic Framework Sols: Advances and Perspectives

Xie,

Yuan,

2023

Chemistry An Asian Journal

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“…Recently, 2D MOF nanosheets, also named 2D metal–organic layers (MOLs), have attracted great research interest due to their outstanding physical and chemical properties, such as ultrathin layer thickness, high specific surface area, abundant unsaturated metal sites, tunable chemical composition, and recognizable surface atomic structure, which facilitates contact between reactants and active sites, rapid diffusion of reactants and products, and promotes rapid surface redox reactions in the photocatalysis process. – The reduced diffusion pathway from photogenerated carriers to reactants and the increased opportunity for contact between the reactant substrate and the active surface often lead to better catalytic activity of 2D MOF nanosheets than the corresponding 3D stacked structures. – The shortcomings of current research focus on how to expose more metal active sites and the lack of effective strategies to further modify the charge transfer pathways in 2D MOFs. The proper charge transfer pathways in 2D MOFs are very favorable for the generation of photogenerated electron–hole pairs, which are very favorable for SET and energy transfer (ET) of photocatalysts, such as promoting the generation of O 2 to reactive oxygen species.…”

Section: Introductionmentioning

confidence: 99%

Modulating Charge Transfer Pathways to Enhance Photocatalytic Performance of the Metal–Organic Layer Nanosheet

Chen,

Wang,

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Two-dimensional metal–organic layer (MOL) nanosheets, as nonhomogeneous catalysts, show better optical activity in the field of photocatalysis due to their unique structural advantages. Current research focuses on how to modify the structure of 2D nanosheets by means of crystal engineering to modulate the intralayer electron transfer pathway and systematically investigate the impacts of size effect and electron transfer pathway on the energy utilization efficiency of crystalline materials. In the present work, a triple lophine-derived ligand was designed and prepared, which exhibits a large π-conjugation system and multiple D–A (D: donor, A: acceptor) electron transfer pathways. 2D MOL constructed with Cd ions can be exfoliated by physical sonication to obtain double-walled 2D MOL nanosheets. Compared with the bulk crystalline material, the 2D nanosheets exhibit better photovoltaic properties. Benefiting from the excellent structural advantages, 2D MOL nanosheets could be used as photocatalysts for a variety of aerobic oxidation reactions under mild conditions (10 W white LED, room temperature), such as the trifluoromethylation of coumarins, the synthesis of benzimidazole derivatives from aromatic diamines and aromatic aldehydes, and the preparation of 2,4,6-triarylpyridine derivatives, all with high conversion rates and selectivity (yield typically greater than 88%). The related results illustrate that the introduction of the photoactive triple-lophine unit into 2D MOL nanosheets can effectively modulate the electron transport mode and enhance energy utilization, which provides a new research idea for the development of nonhomogeneous photocatalysts aimed at the applications of visible light-driven organic conversion.

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