Optimization Method Based on Simplex for Surface Area Improved Photocatalytic Performance of g-C₃N₄

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(20), P. 13282 - 13300

Published: Sept. 29, 2023

The main objective of the present study was to increase specific surface area (SBET) graphitic carbon nitride (g-C3N4) prepared from dicyandiamide by effectively modifying synthesis procedure using Simplex optimization method. A remarkable in SBET achieved only a few steps, with highest value 86 m2/g. Compared reference material, improved photocatalyst exhibited enhanced and unique structural, textural, optical, electronic properties, reflected ability degrade variety organic pollutants dissolved water. By performing scavenger spin-trapping experiments, it confirmed that major reactive oxygen species formed under visible-light illumination were singlet (1O2) superoxide anion radicals (O2–•) purposed formation mechanism. 1O2 enabled high activity stability optimized materials as well selective response degradation pharmaceutical compounds studied. simple fast algorithm determine new parameters, we obtained an g-C3N4 completely degrades bisphenol conditions

Language: Английский

---

Visible-Light-Induced Domino Perfluoroalkylation/Cyclization to Access Perfluoroalkylated Quinazolinones by an EDA Complex

Organic Letters, Journal Year: 2024, Volume and Issue: 26(32), P. 6884 - 6888

Published: Aug. 1, 2024

The electron donor–acceptor (EDA) complexes have been extensively studied, which formed an electronically excited state, obviating the need for exogenous photocatalyst. Herein, we report a mild and efficient strategy photoinduced radical domino perfluoroalkylation/cyclization using N,N,N′,N′-tetramethylethane-1,2-diamine (TMEDA) as donor. This protocol could be well expanded to access various polycyclic quinazolinones containing perfluoroalkyl groups, exhibiting photocatalyst-free, good functional group tolerance, environmentally friendly features.

Language: Английский

---

Recent Advances in Organic Photocatalyst‐Promoted Carbohydrate Synthesis and Modification under Light Irradiation

Chemistry - An Asian Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Photoredox catalysis has been developed as a sustainable and eco‐friendly catalytic strategy, which might provide innovative solutions to solve the current synthetic challenges barriers in carbohydrate chemistry. During last few decades, study of organic photocatalyst‐promoted synthesis modification received significant attention, provides an excellent inexpensive metal‐free alternative photoredox well introduces new fastest‐growing era access complex carbohydrates simply. In this review, we aim overview under light irradiation, is expected directions for further investigation.

Language: Английский

---

Visible-Light-Induced photoredox aerobic coupling of sulfonium ylides and amines leading to E-selective formation of 2-amino-2-butene-1,4-diones

Organic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel visible-light-induced photoredox three-component aerobic coupling reaction of sulfoxonium ylides and amines is reported.

Language: Английский

---

Photo-driven Aerobic C(sp3)-H Oxidation by Organic Photocatalysts: A Recent Review

Tetrahedron, Journal Year: 2025, Volume and Issue: unknown, P. 134496 - 134496

Published: Jan. 1, 2025

Language: Английский

---

Visible light-induced perfluoroalkylation reaction of indoles in the presence of Na2-eosin Y

Tetrahedron Letters, Journal Year: 2025, Volume and Issue: 162, P. 155571 - 155571

Published: April 11, 2025

Language: Английский

---

Recent Developments on Photochemical Synthesis of 1,n‐Dicarbonyls

Chemistry - A European Journal, Journal Year: 2023, Volume and Issue: 29(49)

Published: June 19, 2023

Abstract 1,n‐dicarbonyls are one of the most fascinating chemical feedstocks finding abundant usage in field pharmaceuticals. Besides, they utilized a plethora synthesis general synthetic organic chemistry. A number ‘conventional’ methods available for their synthesis, such as Stetter reaction, Baker‐Venkatraman rearrangement, oxidation vicinal diols, and deoxybenzoins, synonymous with unfriendly reagents conditions. In last 15 years or so, photocatalysis has taken world chemistry by remarkable renaissance. It is fair to say now that everybody loves light photoredox opened new gateway chemists towards milder, more simpler alternatives previously methods, allowing access many sensitive reactions products. this review, we present readers photochemical variety 1,n‐dicarbonyls. Diverse photocatalytic pathways these molecules have been discussed, placing special emphasis on mechanisms, giving reader an opportunity find all significant developments place.

Language: Английский

---

Photoinduced, Metal-Free Hydroacylation of Aromatic Alkynes for Synthesis of α,β-Unsaturated Ketones via C(sp³)–H Functionalization

Organic Letters, Journal Year: 2024, Volume and Issue: 26(7), P. 1416 - 1420

Published: Feb. 8, 2024

Despite the notable advancements made over past decade in achieving carbon–carbon bonds by transition-metal-catalyzed cross-coupling processes, metal-free reactions for hydroacylation of aromatic alkynes via C(sp3)–H functionalization are still rare and highly desired. Here we report a reliable approach synthesis α,β-unsaturated ketones (chalcones) using MeCN:H2O as green solvent, Eosin Y organic photocatalyst, ambient air oxidant. More significantly, this strategy can effectively transform variety methyl arenes into desired product. With high atom efficiency, use solvents, nature, environmental friendliness, visible light renewable energy source, method is compatible with biologically active molecules.

Language: Английский

---

Ionic Porous Organic Polymer as a Visible-Light Photocatalyst: Efficient Heterogeneous Oxidation of Arylmethylene Compounds and Alcohols Using Molecular Oxygen

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(11), P. 6425 - 6436

Published: May 21, 2024

An ionic porous organic polymer (TzTzIPOP)─synthesized from readily accessible 2,5-di(pyridine-4-yl)thiazolo[5,4-d]thiazole (BpyTzTz) and 3,3′,5,5′-tetrakis(bromomethyl)-2,2′,6,6′-tetramethylbiphenyl (TMBB) as the building blocks using Menshutkin reaction for polymerization─is shown to serve an excellent heterogeneous photoredox well photosensitizing catalyst in presence of molecular oxygen. Efficient green sustainable oxidation arylmethylene compounds (C(sp3)–H bonds) alcohols carbonyl is demonstrated under blue LED irradiation conditions TzTzIPOP Mechanistically, oxidations proceed through photoinduced single-electron transfer energy processes involving intermediacy superoxide anion (O2•–) singlet oxygen (1O2), respectively. The recyclable be robust enough permit reactions multiple times (at least 10 cycles) without loss any catalytic activity. that with oxidant conditions, facilitating easy workup, should much relevance industrial processes.

Language: Английский

---

Photocatalysis as a green alternative toolkit for the construction of nitrogen-enriched heterocycles via the direct and indirect activation of alkynes/alkenes

Green Chemistry, Journal Year: 2023, Volume and Issue: 26(3), P. 1223 - 1280

Published: Dec. 18, 2023

By harnessing the reactivity of alkynes and alkenes under photochemical conditions, novel pathways have been unlocked to construct N -heterocyclic compounds, allowing for more efficient sustainable synthesis.

Language: Английский

---