Article
Chemistry, Physical
Parth K. Patel, Marcos V. Foguel, Percy Calvo-Marzal, Karin Y. Chumbimuni-Torres
Summary: This study demonstrates for the first time a reversible photovoltage generation using metastable-state photoacids in the solid state upon visible light irradiation, achieving a significant gain compared to control solid-state cells. The proton transport through a solid electrolyte support quickly generates a photovoltage of around 200 mV. The novel solid-state cell proposed in this study shows good reversibility and reproducible photovoltage changes, providing new opportunities for lower power electronic applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Organic
Lorenzo Di Terlizzi, Angelo Martinelli, Daniele Merli, Stefano Protti, Maurizio Fagnoni
Summary: The selective generation of weak or strong acids using stable arylazo sulfones has been developed for the photochemical catalytic protection of alcohols and phenols.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Gaoyuan Zhao, Juncheng Li, Ting Wang
Summary: The development of visible-light-induced photoacid catalyzed glycosylation using eosin Y and PhSSPh catalyst system was reported, demonstrating a broad substrate scope and mild reaction conditions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Wengang Xu, Qi Shao, Congjian Xia, Qiao Zhang, Yadi Xu, Yingguo Liu, Mingbo Wu
Summary: A novel protocol for selective defluoroalkylation of polyfluoroarenes with accessible alcohols was reported using photoredox and hydrogen atom transfer (HAT) strategies with the assistance of Lewis acids under visible light irradiation. The protocol exhibited broad scope, excellent regioselectivity, and mild conditions. Mechanistic studies revealed that the reaction proceeded via Lewis acid-promoted HAT and sequential addition to polyfluoroarenes.
Article
Chemistry, Multidisciplinary
Lorenzo Di Terlizzi, Eirini M. Galathri, Stefano Protti, Christoforos G. Kokotos, Maurizio Fagnoni
Summary: This study demonstrates the potential of arylazo sulfones as non-ionic photoacid generators to convert aldehydes and ketones into different compounds under visible-light irradiation. The method offers mild conditions and a broad scope.
Review
Biochemistry & Molecular Biology
Truong Giang Luu, Yongju Jung, Hee-Kwon Kim
Summary: This review summarizes recent studies on visible-light-mediated halogenation reactions with photocatalysts, which have improved reaction efficiency, reduced toxicity, and promoted reactions under mild conditions.
Article
Chemistry, Multidisciplinary
Mari Vellakkaran, Taehwan Kim, Sungwoo Hong
Summary: This study presents a general strategy for site-selective C-H functionalization of heteroarenes, specifically achieving high site selectivity at the C4 position of pyridines through visible-light-induced beta-carbonyl alkylation. The method enables the synthesis of valuable beta-pyridylated (aryl)ketones, aldehydes, and esters with broad functional-group tolerance, serving as an effective tool for late-stage functionalization of complex and medicinally relevant molecules.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Qiang Liu, Yu Lu, He Sheng, Chao-Shen Zhang, Xiao-Di Su, Zhi-Xiang Wang, Xiang-Yu Chen
Summary: The sigma-hole effect is utilized to facilitate the photolysis of phosphonium iodide salts, selectively generating fluoromethyl radicals, allowing for mono-, di-, and trifluoromethylation reactions using fluoromethylphosphonium salts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Anna Konefa, Piotr Piatek, Krzysztof Maksymiuk, Agata Michalska
Summary: Ion-selective sensors use ion-exchange at the interface to observe the binding of analyte ions to neutral ionophores in the probe bulk. An alternative approach is proposed, using uncharged solvatochromic dyes as the optical transducer, which reflects changes in the probe bulk caused by analyte incorporation and provides an analytical signal dependent on the concentration changes. This approach mitigates cross sensitivity to hydrogen ions and allows for application in unbuffered samples and a wide pH range.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Yun-Cheng Luo, Fei-Fei Tong, Yanxia Zhang, Chun-Yang He, Xingang Zhang
Summary: Selective functionalization of inactive C(sp(3))-F bonds to prepare medicinally interesting aryldifluoromethylated compounds remains challenging. One promising route is the transition-metal-catalyzed cross-coupling through oxidative addition of the C(sp(3))-F bond in trifluoromethylarenes (ArCF3), which are ideal precursors for this process due to their ready availability and low cost. Here, we report an unprecedented excited-state palladium catalysis strategy for selective defluoroarylation of trifluoromethylarenes with arylboronic acids. This visible-light-induced palladium-catalyzed cross-coupling proceeds under mild reaction conditions and allows transformation of a variety of arylboronic acids and ArCF3. Preliminary mechanistic studies reveal that the oxidative addition of the C(sp(3))-F bond in ArCF3 to excited-state palladium(0) via a single electron transfer pathway is responsible for the C(sp(3))-F bond activation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Xinfeng Du, Xiaojiang Xie
Summary: This review highlights recent advances in ion-selective optodes, including development of new components, fabrication on novel materials and simplified signaling methods. Cost-effective sensing has been achieved with colorimetric response and distance change, while solutions to potential background optical interference have been offered through various signaling methods.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Chemistry, Multidisciplinary
Yuan-Zheng Cheng, Zuolijun Feng, Xiao Zhang, Shu-Li You
Summary: This article presents an overview of visible-light-induced dearomatization reactions and their applications. These reactions provide a rapid and efficient way to synthesize complex molecules from simple aromatic compounds and have significant implications in the synthesis of natural products, medicinal chemistry, and materials science.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Wen-Min Zhang, Kai-Wen Feng, Rong-Gui Hu, Yan-Jun Guo, Yang Li
Summary: This article presents the development of a visible-light-induced iron catalyst that can selectively transform biomass into formic acid with a high yield of up to 91% at ambient temperature. The mechanism involves multiple iron-catalyzed reactions, and the selectivity is influenced by various factors.
Article
Chemistry, Analytical
Rui Yan, Xiao Luo, Jinfeng Zhou, Ping Wang, Youjun Yang, Xuhong Qian, Yueling Liu
Summary: A new rhodamine derivative functionalized with pH-sensitive sites has been utilized as a chromoionophore in ion-selective nanooptodes for the first time. The biodegradable nanosensors prepared by a simple precipitation method showed promising results in monitoring intracellular sodium concentration changes with high biocompatibility.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Organic
Ming-Hang Bi, Ying Cheng, Wen-Jing Xiao, Jia-Rong Chen
Summary: This study describes a selective three-component 1,4-difluoroalkylesterification enabled by dual photoredox and copper catalysis. The protocol utilizes commercially available CF2-reagents as radical precursors and carboxylic acids as oxygen-based nucleophiles, allowing access to difluoroalkylated allylic esters. Furthermore, this protocol can also be extended to intramolecular two-component 1,4-difluoroalkylesterification for the synthesis of 3-substituted benzobutyrolactones. Preliminary mechanistic studies provide evidence for a radical process.
