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29 Results Found

  • Article
  • Open Access
6 Citations
5,065 Views
15 Pages

Two-Step Conversion of CO2 to Light Olefins: Laboratory-Scale Demonstration and Scale-Up Considerations

  • Matti Reinikainen,
  • Aki Braunschweiler,
  • Sampsa Korpilo,
  • Pekka Simell and
  • Ville Alopaeus

The highly selective production of light olefins from CO2 was demonstrated for the first time with a laboratory-scale process comprising consecutive reverse water gas shift (RWGS) and Fischer–Tropsch (FT) reactors. The RWGS reaction, catalyzed...

  • Article
  • Open Access
1,830 Views
16 Pages

Molecular Decoration and Unconventional Double Bond Migration in Irumamycin Biosynthesis

  • Vera A. Alferova,
  • Anna A. Baranova,
  • Olga A. Belozerova,
  • Evgeny L. Gulyak,
  • Andrey A. Mikhaylov,
  • Yaroslav V. Solovev,
  • Mikhail Y. Zhitlov,
  • Arseniy A. Sinichich,
  • Anton P. Tyurin and
  • Stanislav S. Terekhov
  • + 7 authors

3 December 2024

Irumamycin (Iru) is a complex polyketide with pronounced antifungal activity produced by a type I polyketide (PKS) synthase. Iru features a unique hemiketal ring and an epoxide group, making its biosynthesis and the structural diversity of related co...

  • Feature Paper
  • Article
  • Open Access
17 Citations
6,922 Views
15 Pages

DFT Calculations of 1H- and 13C-NMR Chemical Shifts of Geometric Isomers of Conjugated Linoleic Acid (18:2 ω-7) and Model Compounds in Solution

  • Themistoklis Venianakis,
  • Christina Oikonomaki,
  • Michael G. Siskos,
  • Panayiotis C. Varras,
  • Alexandra Primikyri,
  • Eleni Alexandri and
  • Ioannis P. Gerothanassis

11 August 2020

A density functional theory (DFT) study of the 1H- and 13C-NMR chemical shifts of the geometric isomers of 18:2 ω-7 conjugated linoleic acid (CLA) and nine model compounds is presented, using five functionals and two basis sets. The results are...

  • Article
  • Open Access
22 Citations
4,139 Views
16 Pages

Sr1-xKxFeO3 Perovskite Catalysts with Enhanced RWGS Reactivity for CO2 Hydrogenation to Light Olefins

  • Yuanhao Hou,
  • Xinyu Wang,
  • Ming Chen,
  • Xiangyu Gao,
  • Yongzhuo Liu and
  • Qingjie Guo

The catalytic hydrogenation of CO2 to light olefins (C2–C4) is among the most practical approaches to CO2 utilization as an essential industrial feedstock. To achieve a highly dispersed active site and enhance the reactivity of the reverse wate...

  • Article
  • Open Access
2 Citations
1,800 Views
11 Pages

24 February 2025

The conversion of carbon dioxide into fuels and fine chemicals is a highly desirable route for mitigating flue gas emissions. However, achieving selectivity toward olefins remains challenging and typically requires high temperatures and pressures. He...

  • Article
  • Open Access
413 Views
18 Pages

5 March 2026

Linear α-olefins (LAOs) from CO/H2 represent an attractive non-petroleum route, yet their selective formation over Fe catalysts is often limited by CO2 formation via water–gas shift (WGS) reaction and by secondary hydrogenation that consu...

  • Feature Paper
  • Article
  • Open Access
2 Citations
1,514 Views
17 Pages

15 October 2025

Alkali metal-modified M-ZSM-5 zeolites (M: Li+, Na+, K+) were synthesized by cationic exchange and characterized using ICP-MS, XRD, N2 adsorption–desorption, Py-IR and NH3-TPD techniques to evaluate their elemental composition, structure, textu...

  • Review
  • Open Access
9 Citations
7,578 Views
13 Pages

21 September 2020

Construction of carbon–carbon bonds is one of the most important tools for the synthesis of complex organic molecules. Among multiple possibilities are the carbonyl–alkyne and carbonyl–olefin metathesis reactions, which are used to...

  • Article
  • Open Access
20 Citations
6,813 Views
20 Pages

1 July 2020

Methane is activated at ambient conditions in a dielectric barrier discharge (DBD) plasma reactor packed with Pd/γ-alumina catalyst containing different loadings of Pd (0.5, 1, 5 wt%). Results indicate that the presence of Pd on γ-alumina...

  • Article
  • Open Access
1,874 Views
18 Pages

Unlike on Fe and Co catalysts, the CO conversion effect on Ru catalyst performance is little reported. This study is undertaken to explore the issue using a series of Ru/NaY catalysts under 200–230 °C, 2.0 MPa, H2/CO = 2, and 10–60% C...

  • Article
  • Open Access
14 Citations
6,884 Views
19 Pages

A DFT study of the 1H NMR chemical shifts, δ(1H), of geometric isomers of 18:3 conjugated linolenic acids (CLnAs), hexadecatrienyl pheromones, and model triene-containing compounds is presented, using standard functionals (B3LYP and PBE0) as well as...

  • Article
  • Open Access
2 Citations
2,614 Views
16 Pages

17 January 2024

This investigation explores the synthesis of advanced catalysts for epoxidizing long-chain linear α-olefins, a pivotal process in the chemical industry for generating critical intermediates. Employing a hydrothermal technique, we developed four...

  • Feature Paper
  • Article
  • Open Access
6 Citations
3,521 Views
14 Pages

Lignin as a Bio-Sourced Secondary Template for ZSM-5 Zeolite Synthesis

  • Camila Gomes Flores,
  • Helena Schneider and
  • Benoit Louis

24 March 2022

The aim of this study was to investigate the effect of the addition of lignin as a sacrificial agent in ZSM-5 zeolite synthesis. Peculiar growths of ZSM-5 crystals leading to various textural properties were observed. Hence, the behavior in acid-cata...

  • Article
  • Open Access
14 Citations
7,981 Views
24 Pages

9 June 2018

An overview of the methodologies to elucidate the microstructure of copolymers of ethylene and cyclic olefins through 13C Nuclear magnetic resonance (NMR) analysis is given. 13C NMR spectra of these copolymers are quite complex because of the presenc...

  • Communication
  • Open Access
3 Citations
2,910 Views
18 Pages

Perovskite versus ZnCuInS/ZnS Luminescent Nanoparticles in Wavelength-Shifting Layers for Sensor Applications

  • Aleksandra Sosna-Głębska,
  • Natalia Szczecińska,
  • Maciej Sibiński,
  • Gabriela Wiosna-Sałyga and
  • Bartłomiej Januszewicz

2 May 2021

In this work, the application of quantum dots is evaluated in order to sensitize the commercially popular Si detectors in the UV range. The wavelength-shifting properties of two types of all-inorganic halide perovskite quantum dots as well as ZnCuInS...

  • Article
  • Open Access
1 Citations
2,216 Views
15 Pages

Synthesis of Pyridin-1(2H)-ylacrylates and the Effects of Different Functional Groups on Their Fluorescence

  • Weiguang Yang,
  • Danyang Luo,
  • Guanrong Li,
  • Qiaoli Luo,
  • Martin G. Banwell and
  • Lanmei Chen

8 September 2023

While fluorescent organic materials have many potential as well as proven applications and so have attracted significant attention, pyridine–olefin conjugates remain a less studied subset of such systems. Herein, therefore, we report on the dev...

  • Article
  • Open Access
11 Citations
4,333 Views
10 Pages

Pt(0) complexes have been widely used as catalysts for important reactions, such as the hydrosilylation of olefins. In this context, nuclear magnetic resonance (NMR) spectroscopy plays an important role in characterising of new structures and elucida...

  • Article
  • Open Access
9 Citations
2,770 Views
18 Pages

Sensitivity of Ozone Formation in Summer in Jinan Using Observation-Based Model

  • Chenxi Xu,
  • Xuejuan He,
  • Shida Sun,
  • Yu Bo,
  • Zeqi Cui,
  • Zhanchao Zhang and
  • Hui Dong

1 December 2022

According to online monitoring data on atmospheric ozone and the pollution characteristics of its precursors obtained in Jinan in June 2021, we analyzed different sites: urban sites (city monitoring station, Quancheng Square), an industrial park site...

  • Article
  • Open Access
24 Citations
6,258 Views
10 Pages

Real-Time Monitoring and Detection of Single-Cell Level Cytokine Secretion Using LSPR Technology

  • Chen Zhu,
  • Xi Luo,
  • Wilfred Villariza Espulgar,
  • Shohei Koyama,
  • Atsushi Kumanogoh,
  • Masato Saito,
  • Hyota Takamatsu and
  • Eiichi Tamiya

19 January 2020

Cytokine secretion researches have been a main focus of studies among the scientists in the recent decades for its outstanding contribution to clinical diagnostics. Localized surface plasmon resonance (LSPR) technology is one of the conventional meth...

  • Review
  • Open Access
3 Citations
4,306 Views
39 Pages

Fatty Amines in Detergents and Cosmetics: Current State and Biocircular Perspectives

  • Maria-Beatrice Coltelli,
  • Annabel Serpico,
  • Rosa Domenech,
  • Mar Tronch,
  • Carolina Galli,
  • Paolo Sonzini,
  • Clara Escrivà-Cerdán,
  • Sergio Mastroianni,
  • Andrea Lazzeri and
  • Anna Maria Raspolli Galletti
  • + 1 author

15 October 2025

Fatty amines are nitrogen-containing organic compounds synthesized from fatty acids, olefins, or alcohols, typically derived from natural oils or petrochemical sources. These molecules generally feature long hydrophobic alkyl chains ranging from C8 t...

  • Review
  • Open Access
5 Citations
4,386 Views
40 Pages

A Survey on the Chemical Recycling of Polyolefins into Monomers

  • Larissa Carvalho,
  • Gabriela Mattos,
  • Natasha Sitton,
  • Jamilly Barros,
  • Débora Miranda,
  • Rodrigo Luciano and
  • José Carlos Pinto

3 July 2025

The growing global concern over plastic waste accumulation has brought this issue to the forefront of environmental discussions. The increasing demand for plastic materials has led to the widespread production of plastic resins. However, the low cost...

  • Article
  • Open Access
5 Citations
3,062 Views
21 Pages

Surface Chemical Effects on Fischer–Tropsch Iron Oxide Catalysts Caused by Alkali Ion (Li, Na, K, Cs) Doping

  • Mirtha Z. Leguizamón León Ribeiro,
  • Joice C. Souza,
  • Igor Ferreira Gomes,
  • Muthu Kumaran Gnanamani,
  • Michela Martinelli,
  • Gary Jacobs and
  • Mauro Celso Ribeiro

2 October 2024

Among the alkali metals, potassium is known to significantly shift selectivity toward value-added, heavier alkanes and olefins in iron-based Fischer–Tropsch synthesis catalysts. The aim of the present contribution is to shed light on the mechan...

  • Article
  • Open Access
2 Citations
4,028 Views
19 Pages

Synthesis and Characterization of Iron-Based Catalysts for Carbon Dioxide Valorization

  • Alexandra Bakratsa,
  • Vasiliki Zacharopoulou,
  • George Karagiannakis,
  • Vasileios Zaspalis and
  • Georgia Kastrinaki

6 June 2024

The extensive release of carbon dioxide (CO2) into the atmosphere is associated with the detrimental impacts of the global environmental crisis. Consequently, the valorization of CO2 from industrial processes holds great significance. Transforming CO...

  • Article
  • Open Access
7 Citations
2,562 Views
13 Pages

29 December 2021

Label-free surface plasmon resonance (SPR) detection of mercuric ions in various aqueous solutions, using capped gold nanoslit arrays combined with electrochemical (EC) sensing technique, is demonstrated. The nanoslit arrays are fabricated on flexibl...

  • Article
  • Open Access
1,490 Views
18 Pages

30 June 2025

In this study, density functional theory (DFT) was used to analyze the processes that govern the interactions among triethylaluminum (TEAL), the Ziegler–Natta (ZN) catalyst, and the inhibitory compounds dimethylamine (DMA) and diethylamine (DEA...

  • Feature Paper
  • Article
  • Open Access
4 Citations
4,990 Views
24 Pages

Layered Double Hydroxide (LDH)-Derived Mixed Oxides for Enhanced Light Hydrocarbon Production from CO2 Hydrogenation

  • Evridiki Mandela,
  • Antigoni G. Margellou,
  • Athanasia Kotsaridou,
  • George E. Marnellos,
  • Michalis Konsolakis and
  • Konstantinos S. Triantafyllidis

27 March 2025

Layered double hydroxide (LDH)-derived mixed oxides offer a promising approach for CO2 hydrogenation to light hydrocarbons. Herein, we explore the impact of various transition metals (X = Mn, Co, Cu, and Zn) incorporated into the M-Al or M-(Al+Fe) LD...

  • Article
  • Open Access
9 Citations
6,178 Views
15 Pages

Investigation of Biochemical Alterations in Ischemic Stroke Using Fourier Transform Infrared Imaging Spectroscopy—A Preliminary Study

  • Fazle Rakib,
  • Carmen M. Ali,
  • Mohammed Yousuf,
  • Mohammed Afifi,
  • Pooja R. Bhatt,
  • Ehsan Ullah,
  • Khalid Al-Saad and
  • Mohamed H. M. Ali

25 October 2019

Objective: Brain damage, long-term disability and death are the dreadful consequences of ischemic stroke. It causes imbalance in the biochemical constituents that distorts the brain dynamics. Understanding the sub-cellular alterations associated with...

  • Article
  • Open Access
5 Citations
3,592 Views
17 Pages

Polymers based on renewable monomers are projected to have a significant role in the sustainable economy, even in the near future. Undoubtedly, the cationically polymerizable β-pinene, available in considerable quantities, is one of the most pro...

  • Review
  • Open Access
1 Citations
1,108 Views
51 Pages

6 January 2026

Plastic streams dominated by polyethylene (PE) including PE HD/MD (High Density/Medium Density) and PE LD/LLD (Low Density/Linear Low Density), polypropylene (PP), and polyvinyl chloride (PVC) across Europe demand a design framework that links synthe...