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54 Results Found

  • Feature Paper
  • Review
  • Open Access
5 Citations
3,622 Views
28 Pages

17 February 2023

N-Heterocyclic carbenes (NHCs) are nowadays one of the most widely employed ligands in organometallic chemistry and homogeneous catalysis due to the inherent stability of the metal-carbene bond and the ease of modification of the backbone as well as...

  • Review
  • Open Access
83 Citations
12,773 Views
36 Pages

22 May 2015

Synthetic modification of nucleoside structures provides access to molecules of interest as pharmaceuticals, biochemical probes, and models to study diseases. Covalent modification of the purine and pyrimidine bases is an important strategy for the s...

  • Article
  • Open Access
18 Citations
5,900 Views
10 Pages

22 February 2018

The neutral Ru(II) complex κP-[RuCl2(η6-p-cymene)(CAP)] (1), and the two ionic complexes κP-[RuCl(η6-p-cymene)(MeCN)(CAP)]PF6 (2) and κP-[RuCl(η6-p-cymene)(CAP)2]PF6 (3), containing the water-soluble phosphine 1,4,7-triaza-9-phosphatricyclo[5.3.2.1]t...

  • Article
  • Open Access
8 Citations
2,339 Views
12 Pages

25 June 2021

5-hydroxymethylfurfural (HMF) obtained from biomass is an important platform chemical for the next generation of plastics and biofuel production. Although industrialized, the high yield of HMF in aqueous systems was rarely achieved. The main problem...

  • Article
  • Open Access
2 Citations
1,995 Views
11 Pages

24 July 2023

A chitosan/poly(vinyl alcohol)-stabilized copper nanoparticle (CP@Cu NPs) was used as a heterogeneous catalyst for the borylation of α, β-unsaturated ketones, MBH alcohols, and MBH esters in mild conditions. This catalyst not only demonstr...

  • Article
  • Open Access
5 Citations
3,522 Views
16 Pages

Water content is an important factor in lipase-catalyzed reactions in organic media but is frequently ignored in the study of lipases by molecular dynamics (MD) simulation. In this study, Candida antarctica lipase B, Candida rugosa lipase and Rhizopu...

  • Article
  • Open Access
45 Citations
14,575 Views
15 Pages

29 April 2013

The origin of life on Earth is widely believed to have required the reactions of organic compounds and their self- and/or environmental organization. What those compounds were remains open to debate, as do the environment in and process or processes...

  • Review
  • Open Access
50 Citations
12,127 Views
36 Pages

7 March 2017

This review provides an overview of heterogeneous bimetallic Pd-Fe catalysts in the C–C and C–O cleavage of platform molecules such as C2–C6 polyols, furfural, phenol derivatives and aromatic ethers that are all easily obtainable from renewable cellu...

  • Feature Paper
  • Article
  • Open Access
12 Citations
3,721 Views
9 Pages

The precise site-specific positioning of metal–ligand complexes on various DNA structures through covalent linkages has gained importance in the development of hybrid catalysts for aqueous-phase homogeneous catalysis. Covalently modified double...

  • Feature Paper
  • Review
  • Open Access
27 Citations
4,750 Views
27 Pages

Metal-Based Catalysts in Biomass Transformation: From Plant Feedstocks to Renewable Fuels and Chemicals

  • Muhammad Saeed Akhtar,
  • Muhammad Tahir Naseem,
  • Sajid Ali and
  • Wajid Zaman

4 January 2025

The transformation of biomass into renewable fuels and chemicals has gained remarkable attention as a sustainable alternative to fossil-based resources. Metal-based catalysts, encompassing transition and noble metals, are crucial in these transformat...

  • Review
  • Open Access
3 Citations
4,326 Views
16 Pages

Recent Progress in Non-Aqueous Biocatalysis of Immobilized Enzymes

  • Jiayun Ma,
  • Luyao Wang,
  • Yan Chu,
  • Yitong Wang,
  • Kequan Chen and
  • Hui Li

26 July 2024

Non-aqueous biocatalysis has attracted broad interest recently due to its differences from traditional aqueous catalysis and increased substrate solubility, which reduces feedback inhibition, improving enantiomer selectivity and completing synthesis...

  • Article
  • Open Access
4 Citations
4,770 Views
14 Pages

9 June 2018

Hydrothermally stable carbon overlayers can protect mesoporous oxides (SiO2 and Al2O3) from hydrolysis during aqueous-phase catalysis. Overlayers made at 800 °C by pyrolysis of 2,3-naphthalenediol deposited out of acetone solution were analyzed b...

  • Review
  • Open Access
172 Citations
35,274 Views
32 Pages

Advances in Metal-Organic Frameworks MIL-101(Cr)

  • Minmin Zou,
  • Ming Dong and
  • Tian Zhao

20 August 2022

MIL-101(Cr) is one of the most well-studied chromium-based metal–organic frameworks, which consists of metal chromium ion and terephthalic acid ligand. It has an ultra-high specific surface area, large pore size, good thermal/chemical/water sta...

  • Article
  • Open Access
15 Citations
3,805 Views
8 Pages

29 March 2020

In order to meet the increasing demand for environmentally benign chemical processes, we developed a Suzuki–Miyaura reaction protocol based on the combination of ohmic heating (ΩH) and supported ionic liquid phase catalysis (SILPC) in aqu...

  • Article
  • Open Access
296 Views
14 Pages

30 December 2025

Catalytic coacervates, or droplet reactors, represent a forefront research area in chemistry and materials science. Despite advancements in this field, challenges persist in achieving liquid–liquid phase separation (LLPS) droplet compartmentali...

  • Review
  • Open Access
57 Citations
14,593 Views
22 Pages

27 October 2009

During these last years, cyclodextrins have contributed greatly to the development of catalytic processes in water. These cyclic oligosaccharides composed of 6(α), 7(β) or 8(γ) glucopyranose units improve the mass transfer in aqueous-organic two-phas...

  • Article
  • Open Access
6 Citations
3,460 Views
12 Pages

12 October 2022

Lipase-catalyzed transesterification is prevalent in industrial production and is an effective alternative to chemical catalysis. However, due to lipases’ unique structure, the reaction requires a biphasic system, which suffers from a low react...

  • Review
  • Open Access
11 Citations
7,557 Views
40 Pages

MIL-101(Cr), a widely studied chromium-based metal–organic framework material consisting of chromium metal ions and terephthalic acid ligands, has attracted much attention due to its ultra-high specific surface area, large pore size, and excell...

  • Article
  • Open Access
2 Citations
2,036 Views
14 Pages

18 January 2024

An excellent oil–water interface is one of the prerequisites for effective lipase catalysis. Therefore, this study aimed to improve lipase activity in terms of catalytic interface optimization. A novel approach for constructing oil–water...

  • Article
  • Open Access
10 Citations
4,208 Views
7 Pages

28 December 2019

The dialkyl peroxides, which contain a thermally unstable oxygen–oxygen bond, are an important source of radical initiators and cross-linking agents. New efficient and green methods for their synthesis are still being sought. Herein, ultrasound...

  • Article
  • Open Access
14 Citations
4,463 Views
9 Pages

Electrochemical Study of Polymorphic MnO2 in Rechargeable Aqueous Zinc Batteries

  • Kun You,
  • Yifei Yuan,
  • Xiuxian Liao,
  • Wenjun Song,
  • Xuedong He,
  • Huile Jin and
  • Shun Wang

10 November 2022

Manganese dioxide is regarded as a promising energy functional material due to its open tunnel structure with enormous applications in energy storage and catalysis. In this paper, α-MnO2 with a 2 × 2 tunnel structure and β-MnO2 with...

  • Review
  • Open Access
36 Citations
9,414 Views
17 Pages

11 September 2013

Ionic liquids are organic salts with melting points typically below ambient or reaction temperature. The unique combination of physical properties of ionic liquids, such as lack of measurable vapor pressure, high thermal and chemical stability, make...

  • Article
  • Open Access
3 Citations
4,493 Views
12 Pages

Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis

  • Yakai Lin,
  • Yuanyuan Liu,
  • Yicheng Su,
  • Lin Wang,
  • Yuanhui Tang,
  • Tianyin Liu,
  • Liwei Ren and
  • Xiaolin Wang

The rational design and realization of multiscale porous structures has been a long-standing challenge in membrane science. Block copolymers (BCPs) with their self-assembly-enabled nanodomains have the potential to make structural breakthroughs. An a...

  • Article
  • Open Access
4 Citations
6,280 Views
14 Pages

9 September 2015

Inspired by biosilicification, biomimetic polymer-silica nanocomposite has aroused a lot of interest from the viewpoints of both scientific research and technological applications. In this study, a novel dual functional polymer, NH2-Alginate, is synt...

  • Article
  • Open Access
5 Citations
6,698 Views
13 Pages

Application of Phase Transfer Catalysis in the Esterification of Organic Acids: The Primary Products from Ring Hydrocarbon Oxidation Processes

  • Hui Wang,
  • Hongfei Lin,
  • Xiaohu Li,
  • Rui Ren,
  • Jianglong Pu,
  • Haiping Zhang,
  • Ying Zheng,
  • Jianshe Zhao,
  • Siauw Ng and
  • Hui Zhang

13 October 2019

For enhancing the cetane number (CN) of diesel fraction, the selective oxidative ring opening method was applied to upgrade ring hydrocarbons. Organic acids, one of the main products from this oxidative reaction, being esterified by the phase transfe...

  • Communication
  • Open Access
7 Citations
6,542 Views
7 Pages

7 February 2017

In the context of sustainable production processes based on bio-derivable feedstocks, the hydrogenolysis of furfuryl alcohol gives access to two important diols. This work evaluates the performance of commercial copper catalysts in the aqueous phase...

  • Abstract
  • Open Access
1,248 Views
1 Page

Currently, lipases are one of the most widely used enzymes, especially in catalysis, mostly due to their high activity in mild conditions and wide specificity. Therefore, obtaining the highest possible catalytic activity, which can be achieved throug...

  • Article
  • Open Access
37 Citations
3,874 Views
13 Pages

Valorization Potential of Oilseed Cakes by Subcritical Water Extraction

  • Jaroslava Švarc-Gajić,
  • Simone Morais,
  • Cristina Delerue-Matos,
  • Elsa F. Vieira and
  • Giorgia Spigno

9 December 2020

The oil industry generates great quantities of oilseed cakes that remain after oil extraction. New technologies are required for their valorization, owing to their high nutritional value. Pumpkin, flax and hemp seed cakes were extracted by subcritica...

  • Article
  • Open Access
75 Citations
9,779 Views
19 Pages

High Surface Area Mesoporous Silica Nanoparticles with Tunable Size in the Sub-Micrometer Regime: Insights on the Size and Porosity Control Mechanisms

  • Federica Rizzi,
  • Rachele Castaldo,
  • Tiziana Latronico,
  • Pierluigi Lasala,
  • Gennaro Gentile,
  • Marino Lavorgna,
  • Marinella Striccoli,
  • Angela Agostiano,
  • Roberto Comparelli and
  • Elisabetta Fanizza
  • + 2 authors

13 July 2021

Mesoporous silica nanostructures (MSNs) attract high interest due to their unique and tunable physical chemical features, including high specific surface area and large pore volume, that hold a great potential in a variety of fields, i.e., adsorption...

  • Article
  • Open Access
48 Citations
7,914 Views
14 Pages

SO42−/Sn-MMT Solid Acid Catalyst for Xylose and Xylan Conversion into Furfural in the Biphasic System

  • Qixuan Lin,
  • Huiling Li,
  • Xiaohui Wang,
  • Longfei Jian,
  • Junli Ren,
  • Chuanfu Liu and
  • Runcang Sun

17 April 2017

A sulphated tin ion-exchanged montmorillonite (SO42−/Sn-MMT) was successfully prepared by the ion exchange method of montmorillonite (MMT) with SnCl4, followed by the sulphation. This catalysis was applied as a solid acid catalyst for the heterogeneo...

  • Article
  • Open Access
19 Citations
6,564 Views
17 Pages

Model Performance Differences in Sulfate Aerosol in Winter over Japan Based on Regional Chemical Transport Models of CMAQ and CAMx

  • Syuichi Itahashi,
  • Kazuyo Yamaji,
  • Satoru Chatani,
  • Kunihiro Hisatsune,
  • Shinji Saito and
  • Hiroshi Hayami

10 December 2018

Sulfate aerosol (SO42−) is a major component of particulate matter in Japan. The Japanese model intercomparison study, J-STREAM, found that although SO42− is well captured by models, it is underestimated during winter. In the first phase...

  • Feature Paper
  • Perspective
  • Open Access
46 Citations
8,826 Views
23 Pages

21 February 2021

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous li...

  • Feature Paper
  • Article
  • Open Access
19 Citations
3,722 Views
18 Pages

Mesoporous TiO2 from Metal-Organic Frameworks for Photoluminescence-Based Optical Sensing of Oxygen

  • Michela Alfè,
  • Valentina Gargiulo,
  • Matteo Amati,
  • Valentin-Adrian Maraloiu,
  • Pasqualino Maddalena and
  • Stefano Lettieri

29 June 2021

Metal−organic frameworks (MOFs) are a class of porous coordination networks extraordinarily varied in physicochemical characteristics such as porosity, morphologies, and compositions. These peculiarities make MOFs widely exploited in a large array of...

  • Article
  • Open Access
142 Citations
20,252 Views
19 Pages

Identification of the Products of Oxidation of Quercetin by Air Oxygenat Ambient Temperature

  • Igor G Zenkevich,
  • Anna Yu Eshchenko,
  • Svetlana V Makarova,
  • Alexander G Vitenberg,
  • Yuri G Dobryakov and
  • Viktor A Utsal

27 March 2007

Oxidation of quercetin by air oxygen takes place in water and aqueous ethanol solutions under mild conditions, namely in moderately-basic media (pH ∼ 8-10) at ambient temperature and in the absence of any radical initiators, without enzymatic catalys...

  • Article
  • Open Access
14 Citations
4,728 Views
20 Pages

Monoketonic Curcuminoid-Lidocaine Co-Deliver Using Thermosensitive Organogels: From Drug Synthesis to Epidermis Structural Studies

  • Aryane A. Vigato,
  • Ian P. Machado,
  • Matheus del Valle,
  • Patricia A. da Ana,
  • Anderson F. Sepulveda,
  • Fabiano Yokaichiya,
  • Margareth K. K. D. Franco,
  • Messias C. Loiola,
  • Giovana R. Tófoli and
  • Daniele R. de Araujo
  • + 2 authors

Organogels (ORGs) are remarkable matrices due to their versatile chemical composition and straightforward preparation. This study proposes the development of ORGs as dual drug-carrier systems, considering the application of synthetic monoketonic curc...

  • Review
  • Open Access
23 Citations
4,756 Views
24 Pages

A Comprehensive Review on Metal Catalysts for the Production of Cyclopentanone Derivatives from Furfural and HMF

  • Ying Duan,
  • Yiyi Cheng,
  • Zhi Hu,
  • Chenxu Wang,
  • Dong Sui,
  • Yanliang Yang and
  • Tianliang Lu

14 July 2023

The catalytic transformation of biomass-based furan compounds (furfural and HMF) for the synthesis of organic chemicals is one of the important ways to utilize renewable biomass resources. Among the numerous high-value products, cyclopentanone deriva...

  • Article
  • Open Access
1 Citations
2,315 Views
11 Pages

Aerogel-Like Material Based on PEGylated Hyperbranched Polymethylethoxysiloxane

  • Kirill Borisov,
  • Alexandra Kalinina,
  • Aleksandra Bystrova and
  • Aziz Muzafarov

7 October 2023

Aerogels are a class of materials that have gained increasing attention over the past several decades due to their exceptional physical and chemical properties. These materials are highly porous, with a low density and high surface area, allowing for...

  • Article
  • Open Access
22 Citations
4,769 Views
14 Pages

12 March 2022

Herein, we report high electrocatalytic activity of monoclinic VO2 (M1 phase) for the oxygen evolution reaction (OER) for the first time. The single-phase VO2 (M1) nanoparticles are prepared in the form of uniformly covering the surface of individual...

  • Article
  • Open Access
17 Citations
6,945 Views
20 Pages

From a Sequential Chemo-Enzymatic Approach to a Continuous Process for HMF Production from Glucose

  • Alexandra Gimbernat,
  • Marie Guehl,
  • Nicolas Lopes Ferreira,
  • Egon Heuson,
  • Pascal Dhulster,
  • Mickael Capron,
  • Franck Dumeignil,
  • Damien Delcroix,
  • Jean-Sébastien Girardon and
  • Rénato Froidevaux

17 August 2018

Notably available from the cellulose contained in lignocellulosic biomass, glucose is a highly attractive substrate for eco-efficient processes towards high-value chemicals. A recent strategy for biomass valorization consists on combining biocatalysi...

  • Article
  • Open Access
21 Citations
2,082 Views
19 Pages

Oil-Soluble Exogenous Catalysts and Reservoir Minerals Synergistically Catalyze the Aquathermolysis of Heavy Oil

  • Yongfei Li,
  • Shu Zhang,
  • Ying Wang,
  • Guobin Qi,
  • Tao Yu,
  • Xin Xin,
  • Bin Zhao and
  • Gang Chen

22 September 2023

Oil is the “blood” and economic lifeblood of modern industry, but traditional light crude oil has been over-consumed, and it has been difficult to meet human demand for energy, so the exploitation of heavy oil is particularly important. I...

  • Article
  • Open Access
9 Citations
4,257 Views
14 Pages

The 3D-Printing Fabrication of Multichannel Silicone Microreactors for Catalytic Applications

  • Alejandro Ibáñez-de-Garayo,
  • Mikel Imizcoz,
  • Maitane Maisterra,
  • Fernando Almazán,
  • Diego Sanz,
  • Fernando Bimbela,
  • Alfonso Cornejo,
  • Ismael Pellejero and
  • Luis M. Gandía

9 January 2023

Microstructured reactors (MSRs) are especially indicated for highly demanding heterogeneous catalysis due to the small channel dimensions that minimize diffusional limitations and enhance mass and heat transport between the fluid and the catalyst. He...

  • Article
  • Open Access
6 Citations
1,994 Views
16 Pages

29 July 2023

In this study, we present a novel composite material consisting of β-cyclodextrin nanosponge and sodium alginate, used as a support for the immobilization of palladium (Pd) nanoparticles. The composite alginate-cyclodextrin nanosponge beads were...

  • Article
  • Open Access
5 Citations
3,600 Views
16 Pages

A stable water-in-oil Pickering emulsion was fabricated with SO3H-functionalized ionic liquid and surface-modified silica nanoparticles and used for 2,2′-(4-nitrophenyl) dipyrromethane synthesis in a packed-bed microreactor, exhibiting high reaction...

  • Article
  • Open Access
2,783 Views
14 Pages

Synthesis and Evaluation of the Antiproliferative Activity of the Derivatives of 3,5-Diaryl-3,4-dihydro-2H-pyrrole-2-carboxylic Acids

  • Vesela Mihaylova,
  • Ivan Iliev,
  • Anelia Vasileva,
  • Elizabeth Mazzio,
  • Bereket Mochona,
  • Nelly Mateeva and
  • Donka Tasheva

The metabolic cycle of L-proline plays a crucial role in cancer cell survival, proliferation, and metastasis. A key intermediate in the biosynthesis and degradation of proline is 3,4-dihydro-2H-pyrrole-2-carboxylic acid. A direct route for synthesizi...

  • Feature Paper
  • Review
  • Open Access
1 Citations
1,591 Views
23 Pages

30 July 2025

This review surveys recent advances and emerging prospects in phase-transfer catalysis (PTC) for fuel desulfurization. In response to increasingly stringent environmental regulations, the removal of sulfur from transportation fuels has become imperat...

  • Article
  • Open Access
6 Citations
2,730 Views
13 Pages

Palladium Decorated, Amine Functionalized Ni-, Cd- and Co-Ferrite Nanospheres as Novel and Effective Catalysts for 2,4-Dinitrotoluene Hydrogenation

  • Viktória Hajdu,
  • Emőke Sikora,
  • Ferenc Kristály,
  • Gábor Muránszky,
  • Béla Fiser,
  • Béla Viskolcz,
  • Miklós Nagy and
  • László Vanyorek

30 October 2022

2,4-diaminotoluene (TDA) is one of the most important polyurethane precursors produced in large quantities by the hydrogenation of 2,4-dinitrotoluene using catalysts. Any improvement during the catalysis reaction is therefore of significant importanc...

  • Article
  • Open Access
15 Citations
3,605 Views
14 Pages

10 February 2023

High internal phase Pickering emulsion (Pickering HIPE) stabilized by enzyme-decorated metal-organic frameworks (MOFs) nanoparticles is developed for biphasic biocatalysts to enhance lipase catalysis and recycling. Specifically, enzyme decorated nano...

  • Article
  • Open Access
5 Citations
2,737 Views
12 Pages

TiO2@lipophilic Porphyrin Composites: New Insights into Tuning the Photoreduction of Cr(VI) to Cr(III) in Aqueous Phase

  • Antonio Pennetta,
  • Sabrina Di Masi,
  • Federica Piras,
  • Xiangfei Lü,
  • Jun Li,
  • Giuseppe Edigio De Benedetto and
  • Giuseppe Mele

Metal-free and Cu(II)-lipophilic porphyrins [H2Pp and Cu(II)Pp] loaded on titanium dioxide in the anatase phase (TiO2) were prepared and used as a heterogeneous catalyst for the photoreduction of Cr(VI) to Cr(III) in aqueous suspensions under UV&ndas...

  • Article
  • Open Access
2 Citations
2,706 Views
19 Pages

High Performance Carbon Material Prepared from Phalsa Using Mild Pyrolytic Process towards Photodegradation of Methylene Blue under the Irradiation of UV Light

  • Sameerah I. Al-Saeedi,
  • Muhammad Ali Bhatti,
  • Aneela Tahira,
  • Ghadah M. Al-Senani,
  • Nada S. Al-Kadhi,
  • Ayman Nafady and
  • Zafar Hussain Ibupoto

7 February 2023

In this study, we have used a mild pyrolytic process for the synthesis of luminescent carbon material from phalsa (Grewia asiatica Linn) and utilized it for the photodegradation of methylene blue (MB) in aqueous solution under the irradiation of ultr...

  • Feature Paper
  • Article
  • Open Access
6 Citations
2,821 Views
13 Pages

Noble-Metal Nanoparticle-Embedded Silicon Nanogratings via Single-Step Laser-Induced Periodic Surface Structuring

  • Yulia Borodaenko,
  • Evgeniia Khairullina,
  • Aleksandra Levshakova,
  • Alexander Shmalko,
  • Ilya Tumkin,
  • Stanislav Gurbatov,
  • Aleksandr Mironenko,
  • Eugeny Mitsai,
  • Evgeny Modin and
  • Aleksandr A. Kuchmizhak
  • + 1 author

7 April 2023

Here, we show that direct femtosecond laser nanostructuring of monocrystalline Si wafers in aqueous solutions containing noble-metal precursors (such as palladium dichloride, potassium hexachloroplatinate, and silver nitrate) allows for the creation...

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