Red light excitation: illuminating photocatalysis in a new spectrum

Beilstein Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: 21, P. 296 - 326

Published: Feb. 7, 2025

Red-light-activated photocatalysis has become a powerful approach for achieving sustainable chemical transformations, combining high efficiency with energy-saving, mild conditions. By harnessing the deeper penetration and selectivity of red near-infrared light, this method minimizes side reactions typical higher-energy sources, making it particularly suited large-scale applications. Recent advances highlight unique advantages both metal-based metal-free catalysts under red-light irradiation, broadening range possible reactions, from selective oxidations to complex polymerizations. In biological contexts, enables innovative applications in phototherapy controlled drug release, exploiting its tissue low cytotoxicity. Together, these developments underscore versatility impact photocatalysis, positioning as cornerstone green organic chemistry significant potential synthetic biomedical fields.

Language: Английский

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From Structure to Function: Designing Iridium Catalysts with Spin-Forbidden Excitation for Low-Energy Light-Driven Reactions

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Herein we describe a comprehensive study of ligand effects on optoelectronic properties series Ir(III) catalysts which undergo formally spin-forbidden excitation using low-energy light. We demonstrate that electronic and steric tuning several variables can be explained by their impact the HOMO LUMO energies complex. Density functional theory calculations catalysts' adiabatic triplet agree with experimental results to within 0.05 eV average. As many these subtle are independent each other, merger them in single complex tends have an additive effect thus succeeded developing family highly oxidizing iridium photocatalysts operate excitation.

Language: Английский

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Near-Infrared-Responsive Semiconductor Quantum Dots for Solar Photocatalysis

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Language: Английский

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Liquid PEG and PEGDA as Protective Matrices for TTA‐UC Functioning in Air and Their Application in Information Encryption

Chemistry - A European Journal, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract Photochemical deoxygenation offers a promising solution to the oxygen sensitivity issue in Triplet‐triplet annihilation upconversion (TTA‐UC). This study utilized polyethylene glycol (PEG)‐200 and diacrylate (PEGDA)‐575 as solvents singlet scavengers for TTA‐UC conducted air. The efficiency of Pt(OEP)/DPA aerated PEG‐200 is similar that nitrogen‐saturated PEG‐200. Prolonged 532 nm light irradiation causes PEGDA‐575 undergo photoinitiated polymerization via homomolecular TTA, leading reduction DPA's emission an increase Pt(OEP)’s phosphorescence. These results enabled development high‐level information encryption platform using direct‐writing method with Pt(OEP)/DPA/PEGDA‐575 or Pt(OEP)/DPA/PEGDA‐575/PEG‐200 ink. only readable under certain lighting conditions at specific times can be erased by exposure light.

Language: Английский

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Recent advances of triplet–triplet annihilation upconversion in photochemical transformations

Current Opinion in Green and Sustainable Chemistry, Journal Year: 2023, Volume and Issue: 43, P. 100841 - 100841

Published: June 19, 2023

Language: Английский

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