Bridging and terminal hydroxyl groups of Zr(OH)₄ as active sites for the ultraselective transformation of biomass-based alcohols

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(4), P. 1008 - 1016

Published: Jan. 1, 2024

Developing a cost-effective and multi-functional heterogeneous catalyst for various biomass transformations is important in both academic industrial communities.

Language: Английский

---

Synthesis and Evaluation of Mesoporous Silica Nanoparticle Catalyst Supports Prepared from South African Coal Fly Ash

Waste and Biomass Valorization, Journal Year: 2024, Volume and Issue: 15(8), P. 5053 - 5068

Published: April 18, 2024

Abstract The development of environmentally sustainable catalytic reaction systems for the oxidation organic compounds has gained significant interest, with widespread application across various industries. This study investigates suitability mesoporous silica nanoparticles, synthesized from coal fly ash, as catalyst supports in veratryl alcohol, a compound that serves model to mimic behavior lignin-derived structures commonly found biomass waste. A Cu(II) salicylaldimine complex was employed catalyst, tert -Butyl hydrogen peroxide oxidant. Silica were ash derived Na 2 SiO 3 solutions. effect pre-dealumination during preparation, variation surfactant nanoparticle synthesis, and storage conditions on performance evaluated compared MCM-41 SBA-15. textural properties notably influenced by choice used its while affected abundance silanol groups necessary successful immobilisation. Graphical

Language: Английский

---

Exploring structural, magnetic, and catalytic diversity in tetranuclear {Cu4O4} cubane cores and a dinuclear complex derived from closely related ligand systems

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This study highlights the magnetic and catalytic diversity of three tetranuclear {Cu 4 O } cubane complexes one dinuclear Cu II complex, emphasizing distinct coordination environments, interactions, efficiency.

Language: Английский

---

Chemical fixation of atmospheric CO2 in tricopper(II)-carbonato complexes with tetradentate N-donor ligands: reactive intermediates, probable mechanism, catalytic and magneto-structural studies

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(27), P. 11514 - 11530

Published: Jan. 1, 2024

We herein report the mechanistic investigation of CO 2 fixation through trapping an intermediate species on way to formation tricopper( ii )-carbonato complexes and detailed catalysis magneto-structural studies.

Language: Английский

---

Insight into the Magnetic Exchange Interactions and Anisotropy in Heterobimetallic Cu^II–Ln^III Complexes: A Rare Example of Cu–Gd Single-Molecule Magnets

Crystal Growth & Design, Journal Year: 2024, Volume and Issue: 24(18), P. 7537 - 7548

Published: Sept. 4, 2024

Language: Английский

---

Cu(II) Coordination Polymers for the Selective Oxidation of Biomass-Derived Veratryl Alcohol in Green Solvents: A Sustainable Catalytic Approach

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(40), P. 18615 - 18631

Published: Sept. 26, 2024

Four air-stable one-dimensional copper(II) coordination polymers (

Language: Английский

---

Copper-Catalyzed C(sp³)–H Alkylation of Fluorene with Primary and Secondary Alcohols using Borrowing Hydrogen Method

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(74), P. 10144 - 10147

Published: Jan. 1, 2024

Despite the limited success of copper-catalyzed alkylations, (NNS)CuCl proved to be an effective catalyst for sp

Language: Английский

---

Metal-Free Catalytic Conversion of Veratryl and Benzyl Alcohols through Nitrogen-Enriched Carbon Nanotubes

C – Journal of Carbon Research, Journal Year: 2024, Volume and Issue: 10(1), P. 13 - 13

Published: Jan. 26, 2024

Nitrogen-rich carbon nanotubes NCNT700 and NCNT800 were prepared using the chemical vapor deposition method (CVD). The catalysts characterized via high-resolution transmission electron microscopy (HRTEM) X-ray photoelectron spectroscopy (XPS) analysis. Both found to have an inverted cup-stack-like morphology. XPS analysis revealed that are rich in pyridinic sites with variable amounts of nitrogen on their surface. NCTN700, a higher content more its surface, was be good catalyst for oxidation benzyl veratryl alcohols into respective aldehydes. It observed toluene 4-methyl veratrole also produced this reaction. amount as high 21%, 99% conversion benzaldehyde presence NCNTs-700. mechanistic pathway through DFT studies, where unusual product formation aromatic alkanes such explained during astonishing observe reduced reaction proceeds forward direction peroxide (tert-butyl hydroperoxide, TBHP). During computational analysis, it did not appear proceed direct disproportionation Rather, alcohol (the reactant) used may undergo by releasing hydrogen radicals. atoms released been trapped pyrrolic surface later transferred reactant molecules produce side product.

Language: Английский

---

Iron-Catalyzed sp³ C–H Alkylation of Fluorene with Primary and Secondary Alcohols: A Borrowing Hydrogen Approach

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 89(22), P. 16223 - 16241

Published: Aug. 23, 2024

The utilization of earth-abundant, cheap, and nontoxic transition metals in important catalytic transformations is essential for sustainable development, iron has gained significant attention as the most abundant metal. A mixture FeCl2 (3 mol %), phenanthroline (6 KOtBu (0.4 eqivalent) was used an effective catalyst sp3 C–H alkylation fluorene using alcohol a nonhazardous alkylating partner, eco-friendly water formed only byproduct. substrate scope includes wide range substituted fluorenes benzyl alcohols. reaction equally with challenging secondary alcohols unactivated aliphatic Selective mono-C9-alkylation yielded corresponding products good isolated yields. Various postfunctionalizations C-9 alkylated were performed to establish practical utility this alkylation. Control experiments suggested homogeneous path involving borrowing hydrogen mechanism formation subsequent reduction 9-alkylidene intermediate.

Language: Английский

---

Impact of Metal Salts on Coordination Chemistry of Nickel(II) with a N3O Donor Schiff Base Ligand: Synthesis, Structures and Hershfield Surface Analysis

Journal of Structural Chemistry, Journal Year: 2024, Volume and Issue: 65(10), P. 2014 - 2028

Published: Oct. 1, 2024

Language: Английский

---