Dinuclear aluminum complex as an active material for RRAM switching devices.

In this study, we report the synthesis and structural characterization of dinuclear aluminum complex 1, containing redox-active bis-catecholaldimine ligand 6,6'-{[ethane-1,2-diylbis(azanylidene)]bis(methanylidene)}-bis(3,5-di--butyl-1,2-dihydroxybenzene) (LH). Complex 1 was readily obtained by refluxing LH and Al(NO)·9HO in 3 : 2 molar ratio in the presence of triethylamine in a methanolic solution. Single-crystal X-ray diffraction analysis of complex 1 showed that catecholaldimine ligands bound octahedral coordination to each of the two Al(III) centers.

Pinecone-Derived Biocarbon-Polylactic Acid Composites for Sustainable 3D Printing.

To address the escalating need for sustainable manufacturing, the integration of biomass-sourced carbon particles with biodegradable polymers offers a promising and innovative solution. This approach not only tackles environmental dilemmas but also drives material science forward, providing a promising pathway for eco-friendly progress. The present study focuses on developing pinecone-derived biocarbon (PCAC)-infused polylactic acid (PLA) composites for fused deposition modeling (FDM)-based additive manufacturing applications.

Enzymatic depolymerization of lignin and electrocatalytic hydrodeoxygenation for the production of reduced aromatic compounds: A review and perspective.

The depletion of fossil resources and growing environmental concerns have intensified the search for sustainable alternatives for fuel and chemical production. Lignin, an abundant yet underutilized component of lignocellulosic biomass, presents significant potential as a renewable source of aromatic compounds. In this review and perspective, we highlight recent advancement in lignin valorization through enzymatic depolymerization using bacterial and fungal lignin degrading enzymes, and electrocatalytic hydrodeoxygenation (ECHDO).

A Robust Nickel-Interlocked π-Conjugated Covalent Organic Framework Catalyst for Photocatalytic Aromatic Finkelstein and Retro-Finkelstein Reactions.

Covalent organic frameworks (COFs) are emerging as a versatile class of hosts for heterogeneous photocatalysis. Herein, we present a nickel-decorated pyrene- and bipyridine-based olefin-linked COF (Ni@COF1) as a robust and recyclable catalyst for visible-light-driven aromatic Finkelstein and retro-Finkelstein reactions. The extended π-conjugation within the COF framework enhances light absorption, promotes charge transport, and facilitates in situ Ni(0) generation from the pre-installed Ni(II) centers.

Covalent Immobilization of β-Glucosidase on Magnetic Spent Coffee Grounds Modified With PAMAM Dendrimers for Enhanced Glucose Tolerance.

The successful application of enzymes in industries encounters challenges related to high costs, stability, and reuse. In this study, β-glucosidase (BGL) was immobilized via a covalent method after the synthesis of different generations (G) of polyamidoamine (PAMAM) dendrimers modified magnetic spent coffee grounds (SCGs). With the increase in PAMAM generation, BGL immobilization (163.

β-Carotene Production by Oleaginous Yeasts in a Pilot Plant Fermenter: Yield Standardization and Process Scale-Up.

This study reports selective β-carotene pigment production by an oleaginous yeast, IIPL32 (MTCC 25056), in a 500 L fermenter working scale with a practically feasible approach for microbial pigment production scale-up from small (500 mL) to pilot scale (500 L) submerged fermenters using medium rheology and fermenter hydrodynamics. The pigment production was initially standardized by optimizing the carbon and nitrogen load of the fermentation medium. The pigment was purified using a solvent extraction process followed by thin-layer chromatography and analyzed by UV-visible spectrophotometry, high-pressure liquid chromatography, and Fourier-transform infrared spectroscopy, suggesting the dominant presence of β-carotene.

MOF-derived Fe-doped δ-MnO nanoflowers as oxidase mimics: chromogenic sensing of Hg(II) and hydroquinone in aqueous media.

The structure and morphology play a crucial role in enhancing the biomimetic oxidase activity of nanozymes. In this study, a facile chemical oxidation strategy was employed to synthesize MOF-derived MnO, utilizing the structural features of the parent MOF to enhance oxidase-mimicking activity. We have systematically investigated the effects of phase evolution, structural modulation and morphology on the oxidase activity of MnO with Fe substitution.

Selective Upcycling of Aromatic Polymer Waste into Light CC Aromatics Over Ru-Supported Catalysts.

The valorization of plastic waste and biomass has gained significant attention in the twenty first century. Despite structural similarities and the potential to yield similar products, an integrated approach to converting both feedstocks using the same catalyst has not been realized. This study demonstrates the catalytic upcycling of plastic waste and lignin biomass into selective CC aromatics through CO and/or CC bond cleavage using Ru-supported catalysts.

Biomass-based carbon material for next-generation sodium-ion batteries: insights and SWOT evaluation.

In recent years, energy storage has significantly transitioned from lithium to sodium ion due to sodium's abundance and economical and optimal redox potential. Biomass-based carbon anode materials are extensively studied in sodium-ion batteries because of their economic advantages and eco-sustainable approach. Their distinctive microstructural characteristics resulting in higher specific capacitance.

Advances in Hydrogen-Driven Bicarbonate Conversion to Formic Acid and Formate Salts.

According to a January 2025 report by the UK Met Office, carbon dioxide (CO) levels are expected to reach 429.6 ppm in May, marking the highest concentration in over 2 million years. This alarming rise has intensified global efforts to mitigate climate change through carbon capture and utilization (CCU) technologies.

A mini review on revolutionizing hydrogenation catalysis: unleashing transformative power of artificial intelligence.

Context: The field of hydrogenation catalysis has undergone a revolution due to the application of artificial intelligence (AI) and machine learning (ML), which have opened up new avenues for improving catalyst design, reaction efficiency, and pathway optimization. Trial-and-error techniques are a major component of traditional catalyst discovery methods, and they can be resource and time-intensive when it comes to real-world applications. On the other hand, real-time reaction condition optimization, predictive modelling, and quicker catalyst screening are made possible by AI-based techniques.

Anaerobic conversion of de-oiled yeast biomass fractionation waste to biomethane and biohydrogen for resource efficiency in biorefineries.

High-value intracellular bio-compounds are extracted from microbial biomass through cell fractionation processes, which generate discharge streams. These discharges are rich in organic carbon and nitrogen that are derived from the soluble and insoluble protein and carbohydrate polymers. The present study investigated the anaerobic conversion of such a tertiary waste stream generated during the production of glucan-chitin complex through fractionation of de-oiled yeast biomass (a type of spent microbial biomass, which is the solid leftover residue of yeast lipid production process).

Catalytic Hydrogenation of Lignin Ethers and Bio-Oil Using Non-Noble Cobalt Catalysts.

The conversion of lignocellulosic biomass into lignin bio-oil and its subsequent upgrading into saturated cyclic products holds considerable promise for applications in the aviation industry. This study reports the synthesis of a defect-enriched monometallic CoO/Co-350-30 catalyst, which is utilized for hydrogenating lignin-derived molecules and lignin bio-oil obtained via reductive catalytic fractionation (RCF) of wheat straw. Under optimized conditions (180 °C, 2 MPa H, 2 h), benzyl phenyl ether (BPE) affords complete conversion, yielding ≈99% cyclohexanol and ≈98% methylcyclohexane.

Machine learning assisted approximation of descriptors (CO and OH) binding energy on Cu-based bimetallic alloys.

Data driven machine learning (ML) based methods have the potential to significantly reduce the computational as well as experimental cost for the rapid and high-throughput screening of catalyst materials using binding energy as a descriptor. In this study, a set of eight widely used ML models classified as linear, kernel and tree-based ensemble models were evaluated to predict the binding energy of catalytic descriptors (CO* and OH*) on (111)-terminated CuM alloy surfaces using the readily available metal properties in the periodic table as features. Among all the models tested, the extreme gradient boosting regressor (xGBR) model showed the best performance with the root mean square errors (RMSEs) of 0.

Magnetic β-glucosidase-inorganic hybrid nanoflowers: Highly active and recyclable nano-biocatalyst with increased glucose tolerance for cellobiose hydrolysis.

The high surface area, increased enzyme activity, active site accessibility and improved stability of the enzyme-inorganic hybrid nanoflowers have garnered significant attention in recent years. In this study, we have synthesized magnetic β-glucosidase-Cu(PO) nanoflowers (BGL@MNF) using the co-precipitation method. In the presence of magnetic nanoparticles, the catalytic efficiency (K/K) of β-glucosidase is 56.

Controlled acidity-mediated short-chain olefin synthesis over a Mn-Zn-Zr/Zn-SAPO-34 catalyst CO hydrogenation.

Transforming CO into short-chain olefins a methanol-mediated route is challenging due to CO byproduct formation. This study introduces a Mn-Zn-Zr/Zn-SAPO-34 catalyst, achieving 81% short-chain olefin selectivity, 3.9% methane, and 65% CO formation with 18% CO conversion.

Optimizing gas chromatography parameters for thermally unstable dicyclopentadiene mixtures analysis.

Dicyclopentadiene (DCPD) is a versatile compound used in various applications, including resins, polymers, and high-energy-density (HED) fuels, such as exo-tetrahydrodicyclopentadiene (exo-THDCPD). DCPD reaction mixtures are typically analyzed using gas chromatography (GC), but this process can be challenging due to its thermal instability. At temperatures above 150 °C, it can undergo a reverse Diels-Alder reaction (RDAR), decomposing into cyclopentadiene (CPD).

A review on the role of nanocomposites for desulfurization of liquid transportation fuels.

Stringent sulfur removal regulations from transportation fuels from typical levels of 500 ppm to ultra-low levels of 10 ppm (BS-6 standard) present a critical challenge for the crude processing industry. This research thoroughly investigates emerging desulfurization technologies, with a focus on nanocomposite (NC) materials that exhibit exceptional sulfur removal efficiency. Advanced nanocomposite catalysts, such as (TBA)PWFe@TiO@PVA, have near-complete removal rates of 96-99% for complicated sulfur compounds like dibenzothiophene (DBT) and derivatives.

Production and characterization of sophorolipid under yeast-mediated submerged fermentation utilizing Agro-industrial waste.

The challenges of pollution and agro-industrial waste management have led to the development of bioconversion techniques to transform these wastes into valuable products. This has increased the focus on the sustainable and cost-efficient production of biosurfactants from agro-industrial waste. Hence, the present study investigates the production of sophorolipid biosurfactants using the yeast strain IIPL32 under submerged fermentation, employing sugarcane bagasse hydrolysate-a renewable, low-cost agro-industrial waste as the feedstock.

Retraction: Dual catalysis with magnetic chitosan: direct synthesis of cyclic carbonates from olefins with carbon dioxide using isobutyraldehyde as the sacrificial reductant.

Retraction of 'Dual catalysis with magnetic chitosan: direct synthesis of cyclic carbonates from olefins with carbon dioxide using isobutyraldehyde as the sacrificial reductant' by Subodh Kumar , , 2015, , 11860-11866, https://doi.org/10.1039/C5DT01012H.

Retraction: CO as oxidant: an unusual light-assisted catalyst free oxidation of aldehydes to acids under mild conditions.

Retraction of 'CO as oxidant: an unusual light-assisted catalyst free oxidation of aldehydes to acids under mild conditions' by Shafiur Rehman Khan , , 2022, , 2208-2211, https://doi.org/10.1039/D1CC06057K.

Retraction: Visible-light driven reaction of CO with alcohols using a Ag/CeO nanocomposite: first photochemical synthesis of linear carbonates under mild conditions.

Retraction of 'Visible-light driven reaction of CO with alcohols using a Ag/CeO nanocomposite: first photochemical synthesis of linear carbonates under mild conditions' by Anil Malik , , 2023, , 1313-1316, https://doi.org/10.1039/D2CC05152D.

Retraction: Light-induced synthesis of unsymmetrical organic carbonates from alcohols, methanol and CO under ambient conditions.

Retraction of 'Light-induced synthesis of unsymmetrical organic carbonates from alcohols, methanol and CO under ambient conditions' by Sandhya Saini , , 2021, , 12800-12803, https://doi.org/10.1039/D1CC05833A.

Expression of concern: Photo-induced reduction of CO using a magnetically separable Ru-CoPc@TiO@SiO@FeO catalyst under visible light irradiation.

Expression of Concern for 'Photo-induced reduction of CO using a magnetically separable Ru-CoPc@TiO@SiO@FeO catalyst under visible light irradiation' by Pawan Kumar , ., 2015, , 4546-4553, https://doi.org/10.

Expression of concern: Nanocrystalline starch grafted palladium(II) complex for the Mizoroki-Heck reaction.

Expression of concern for 'Nanocrystalline starch grafted palladium(II) complex for the Mizoroki-Heck reaction' by Sanny Verma , , 2013, , 14454-14459, https://doi.org/10.1039/C3DT51685G.