Efficient One‐Pot Synthesis of 2,5‐Furandicarboxylic Acid from Sugars over Polyoxometalate/Metal‐Organic Framework Catalysts

Despite possessing numerous catalytic advantages of MOFs, developing 2D frameworks having excellent chemical stability along with new catalytic properties, remains a grand challenge. Herein, by employing a mixed ligand synthetic approach, we have constructed a 2D Ni‐MOF, IITKGP‐52, which exhibits excellent framework robustness in open air, water, as well as over a wide range of pH solutions (2‐12). Benefitting from its robustness and abundant Lewis acidic open metal sites, IITKGP‐52 is explored in catalyzing the heterogeneous three‐component condensation reaction for the tandem synthesis of bioactive 2‐amino‐3‐cyano‐4H‐pyran derivatives with low catalytic loading, greater compatibility for a wide range of substrates, excellent recyclability and superior catalytic efficiency than the previously employed homo and heterogeneous systems. IITKGP‐52 inaugurates the employment of MOF‐based catalysts for one‐pot synthesis of therapeutic and bioactive 2‐amino‐3‐cyano‐4H‐pyran derivatives.

A Chemically Robust 2D Ni‐MOF as an Efficient Heterogeneous Catalyst for One‐Pot Synthesis of Therapeutic and Bioactive 2‐Amino‐3‐Cyano‐4H‐Pyran Derivatives

Mondal,

Pramanik,

Sahoo

et al. 2024

Polyoxometalates@Metal–Organic Frameworks: Synthesis Strategies, Nanostructure Modulation and Application in Biomass Conversion

Yan,

Yu,

Wang

et al. 2024

Polyoxometalates@metal‐organic frameworks (POMs@MOFs) have attracted much attention as multifunctional materials in biomass catalysis. Individual POMs and MOFs are hindered by their respective defects, such as poor stability and single catalytic active site, which make it difficult to realize large‐scale applications. However, the combination of POMs and MOFs can be used to maximize the catalytic advantages of each. MOFs with high specific surface area and rich pore structure can effectively stabilize and uniformly disperse POMs, while the introduction of POMs also provides more catalytic possibilities for POMs@MOFs. Therefore, POMs@MOFs with ultra‐high porosity, large specific surface area and excellent acid catalytic activity have unique catalytic advantages in the field of biomass catalytic conversion. In this work, we provide an overview of the current development of POMs@MOFs in the field of biomass catalysis. The synthesis strategies of POMs@MOFs are summarized and discussed, highlighting the in‐situ synthesis methods. We focus on the nanostructure engineering of POMs@MOFs, and explore the “structure‐property” relationship in depth. In addition, the representative work of POMs@MOFs in the catalysis of biomass derivatives is summarized. Filially, the prospects, and challenges for the future development of POMs@MOFs in the field of biomass catalysis are also presented.

The Stability Challenge of Furanic Platform Chemicals in Acidic and Basic Conditions

Kolykhalov,

Golysheva,

Erokhin

et al. 2024

The transition toward renewable resources is pivotal for the sustainability of the chemical industry, making the exploration of biobased furanic platform chemicals derived from plant biomass of paramount importance. These compounds, promising alternatives to petroleum‐derived aromatics, face challenges in terms of stability under synthetic conditions, limiting their practical application in the fuel, chemical, and pharmaceutical sectors. Our study presents a comprehensive evaluation of the stability of furan derivatives in various solvents and under different conditions, addressing the significant challenge of their instability. Through systematic experiments involving GC‒MS, NMR, FT‒IR and SEM analyses, we identified key degradation pathways and conditions that either promote stability or lead to undesirable degradation products. These findings demonstrate the strong stabilizing effect of polar aprotic solvents, especially DMF, and reveal the dependence of furan stability on solvent and additive type. This research opens new avenues in the utilization of renewable furans by providing critical insights into their behavior under synthetic conditions, significantly impacting the development of sustainable materials and processes. The broad appeal of this study lies in its potential to guide the selection of conditions for the efficient and sustainable synthesis of furan‐based chemicals, marking a significant advance in green chemistry and materials science.