Toward the Customized Performance on a Supported Au₄Ru₂ Cluster Catalyst

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Abstract Precisely constructing the catalyst structure and composition at atomic level is highly desirable for unexpected properties, but extremely challenging. The success in atomically precise nanochemistry provides an opportunity active site‐tailoring of catalysts toward unique catalysis. Here, monodisperse Au 4 Ru 2 (PPh 3 ) (SC H Ph) 8 clusters are reported that anchored into aerogel as heterogeneous carbonylation process CO hydrogenation coupled with dimethylamine. indeed a performance stage cluster, on which sites cluster act centers to participate synergistic activation reaction , thereby promoting formylation N,N ‐dimethylformamide (DMF), while play decisive role sequent DMF trimethylamine. Notably, can not only exhibit high turnover number performed batch reactor, also show long‐term utilization flowing fixed‐bed system, have been documented previous catalysts.

Language: Английский

---

Utility of silver nanoparticles embedded on covalent organic framework as a highly active catalyst for carboxylative cyclization with CO2: a sustainable route for production of tetronic acids and oxazolidinones

New Journal of Chemistry, Journal Year: 2024, Volume and Issue: 48(26), P. 11982 - 11992

Published: Jan. 1, 2024

The rising amount of carbon dioxide in our atmosphere is a concern regarding environment.

Language: Английский

---

N-Formylation of Carbon Dioxide and Amines with EDTA as a Recyclable Catalyst under Ambient Conditions

Catalysts, Journal Year: 2024, Volume and Issue: 14(8), P. 492 - 492

Published: July 31, 2024

The reduction of CO2 is an important method to produce chemicals such as methanol, formic acid, formaldehyde, etc. In general, the carried out at high temperatures and pressures with precious metals catalysts, which not favorable for industrial procedures. Thus, it will be very useful if researchers can find cost-effective catalysts application in reduction. this work, commercially available ethylenediaminetetraacetic acid (EDTA) was tested a cheap, non-toxic, recyclable catalyst initiate N-carbonylation reaction amines. After screening various parameters, including temperature, pressure, time, solvent, reducing agent, optimal conditions were obtained: 80 °C, 2 MPa, 6 h, 50 mmol% dosage, 1 mL DMSO, 1:1 molar ratio amine agent. Notably, further studies confirmed that EDTA could also effective N-formylation even under ambient (0.1 MPa room temperature). suitability 26 kinds substrates (including aliphatic amines, aromatic alicyclic amines) its reusability investigated, satisfactory results. Scale-up research has been performed effectively conversion (83%) obtain mono-formylated product selectively. Finally, mechanism between proposed via control experiments compared results literature.

Language: Английский

---

Recent advances in N-formylation reaction for the chemical recycling of carbon dioxide

Green Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The homogeneous and heterogeneous catalyst systems applied in N -formylation reaction of amines CO 2 from both are summarized.

Language: Английский

---

Rapid Conversion of CO₂ Using Propargylic Amines by a Silver Nanoparticle-Loaded Triazole-Based Porous Organic Polymer

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(21), P. 25054 - 25064

Published: Oct. 30, 2024

Selective sequestration of atmospheric CO2 and its use as precursors for various value-added products are in growing demand. However, the high activation energy poses a limitation on usage an effective reagent chemical conversion. Herein, we have fabricated triazole- triazine-based porous organic polymer, TT-POP, through alkyne–azide click polymerization that offers recyclable heterogeneous platform anchors active metal nanoparticle catalytic fixation. The highly structure (SBET ∼ 804 m2 g–1) TT-POP with CO2-philic functionalities facilitates selective uptake. Further, is postsynthetically modified by situ formation silver nanoparticles to fabricate catalyst, Ag@TT-POP 589 g–1), 99% conversion 0.5 mmol terminal propargylic amine internal within 15 min their respective oxazolidinone derivatives under ambient conditions (50 °C). computational studies temperature-programmed desorption (TPD) analysis suggest impact nitrogen centers well Ag present Ag@TT-POP, leading enhanced CO2-philicity rapid mechanistic aspects insertion cyclization amines been proposed 1H NMR at different time intervals. In addition, demonstrated activity bulk-scale catalysis (7 mmol, ∼1 g) flue gas conditions. study provides detailed understanding development robust nanoparticle-loaded POP scalable using amines.

Language: Английский

---

Photochemical N-Formylation of Amines and Cyclic Carbonate Synthesis from Epoxides by the Use of Light-Mediated Fixation of Carbon Dioxide Using Covalent Organic Framework/g-C₃N₄ Composites

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

A proficient heterogeneous catalytic system for the photocatalytic N-formylation reaction of amines and cyclic carbonate synthesis from epoxides using CO2 as a carbon source under ambient conditions has been documented. sophisticated approach established current process, aiming successful production formamides carbonates with high levels selectivity efficiency by adjusting several variables such solvent, time, well light involved in reaction. We have synthesized two distinct catalysts, T-COF N-COF, along g-C3N4 heterojunction, demonstrating outstanding performance. Compared to g-C3N4@N-COF, g-C3N4@T-COF photocatalyst showed significantly better light-driven formation other suitable at room temperature. The g-C3N4@COF photocatalysts can be recycled used multiple times without any noticeable decrease efficiency.

Language: Английский

---