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Photocatalysis

Photocatalysis has seen growing interest recently: Not only in the reactions of small molecules such as H2O (water splitting)[1] and CO2 (forming solar fuels),[2] but also in organic synthesis.[3]

[1] J. Xing, W. Q. Fang, H. J. Zhao, H. G. Yang: Inorganic Photocatalysts for Overall Water Splitting
Chem. Asian J. 2012, 7, 642–657

[2] S. N. Habisreutinger, L. Schmidt-Mende, J. K. Stolarczyk: Photocatalytic Reduction of CO2 on TiO2 and Other Semiconductors
Angew. Chem. Int. Ed. 2013, 52, 7372–7408

[3] J. Xuan, W.-J. Xiao: Visible-Light Photoredox Catalysis
Angew. Chem. Int. Ed. 2012, 51, 6828–6838

Also see: Pierre Pichat (Ed): Photocatalysis and Water Purification: From Fundamentals to Recent Applications, Wiley-VCH 2013.

Find all articles on photocatalysis in Wiley Online Library...

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Fabrication of H-TiO2/CdS/Cu2-xS Ternary Heterostructures for Enhanced Photocatalytic Hydrogen Production

Fabrication of H‐TiO2/CdS/Cu2‐xS Ternary Heterostructures for Enhanced Photocatalytic Hydrogen Production

Here we demonstrate the fabrication of a noble metal-free ternary H-TiO2/CdS/Cu2-xS heterostructure with enhanced solar energy absorption and efficient charge separation, which can achieve a high hydrogen production rate of 261.54 μmol⋅g−1⋅h−1.

[Full Paper]
Jiayu Chu, Xijiang Han, Zhen Yu, Yunchen Du, Bo Song, Ping Xu
ChemistrySelect, March 24, 2017, https://doi.org/10.1002/slct.201700419 Read article

Evidence and Effect of Photogenerated Charge Transfer for Enhanced Photocatalysis in WO3/TiO2 Heterojunction Films: A Computational and Experimental Study

Evidence and Effect of Photogenerated Charge Transfer for Enhanced Photocatalysis in WO3/TiO2 Heterojunction Films: A Computational and Experimental Study

Advanced nanostructured WO3/TiO2 heterojunction films are deposited using chemical vapor deposition methods. Against common observation, this system shows an unusual electron transfer from WO3 to TiO2, as proven by theoretical and experimental standpoints. The advantageous electronic synergy within a high-surface-area substrate promotes its photocatalytic properties showing record-high efficiencies for the degradation of organic pollutants.

[Full Paper]
Carlos Sotelo-Vazquez, Raul Quesada-Cabrera, Min Ling, David O. Scanlon, Andreas Kafizas, Pardeep Kumar Thakur, Tien-Lin Lee, Alaric Taylor, Graeme W. Watson, Robert G. Palgrave, James R. Durrant, Christopher S. Blackman, Ivan P. Parkin
Adv. Funct. Mater., March 24, 2017, https://doi.org/10.1002/adfm.201605413 Read article

Cooperation of a Nickel–Bipyridine Complex with Light for Benzylic C−H Arylation of Toluene Derivatives

Cooperation of a Nickel–Bipyridine Complex with Light for Benzylic C−H Arylation of Toluene Derivatives

Gimme the light! Benzylic C−H bonds of toluene derivatives are directly arylated with aryl halides by means of a nickel–dtbbpy catalyst under irradiation with UV light; dtbbpy=4,4′-di-tert-butyl-2,2′-bipyridine.

[Communication]
Naoki Ishida, Yusuke Masuda, Norikazu Ishikawa, Masahiro Murakami
Asian J. Org. Chem., March 21, 2017, https://doi.org/10.1002/ajoc.201700115 Read article

Reliable Performance Characterization of Mediated Photocatalytic Water-Splitting Half Reactions

Reliable Performance Characterization of Mediated Photocatalytic Water‐Splitting Half Reactions

A closer look: Various reliable characterization methods for a photocatalytic reactor consisting of semiconductor particles and mediator shuttles are proposed. The method is exemplified utilizing photocatalytic titania particles in an iron-based aqueous electrolyte for effective oxygen evolution and mediator reduction reactions under illumination. Several product characterization methods, including an optical oxygen sensor, pressure sensor, gas chromatography, and UV/Vis spectroscopy are used and compared.

[Full Paper]
Lihao Han, Meng Lin, Sophia Haussener
ChemSusChem, March 16, 2017, https://doi.org/10.1002/cssc.201601901 Read article

Photocatalytic Phenol–Arene C–C and C–O Cross-Dehydrogenative Coupling

Photocatalytic Phenol–Arene C–C and C–O Cross‐Dehydrogenative Coupling

The formation of C–C and C–O cross-coupling products of phenols and arenes by direct C–H activation has been achieved in the absence of leaving-group functionalities by visible-light photoredox catalysis. The efficiency and chemoselectivity (homo- vs. cross-coupling and C–C vs. C–O) were rationalized on the basis of the oxidation potentials and nucleophilicity values of the aromatic substrates.

[Full Paper]
Anna Eisenhofer, Johnny Hioe, Ruth M. Gschwind, Burkhard König
Eur. J. Org. Chem., March 15, 2017, https://doi.org/10.1002/ejoc.201700211 Read article

Architecture of β-Graphdiyne-Containing Thin Film Using Modified Glaser–Hay Coupling Reaction for Enhanced Photocatalytic Property of TiO2

Architecture of β‐Graphdiyne‐Containing Thin Film Using Modified Glaser–Hay Coupling Reaction for Enhanced Photocatalytic Property of TiO2

A modified Glaser–Hay coupling reaction is used to synthesize β-graphdiyne-containing thin film. Copper foil plays the role of both a substrate and the source of catalyst. The as-grown film is with conductivity property and can be applied to enhance the photocatalytic property of TiO2.

[Communication]
Jiaqiang Li, Ziqian Xie, Yan Xiong, Zhenzhu Li, Qunxing Huang, Shuqing Zhang, Jingyuan Zhou, Rong Liu, Xin Gao, Changguo Chen, Lianming Tong, Jin Zhang, Zhongfan Liu
Adv. Mater., March 15, 2017, https://doi.org/10.1002/adma.201700421 Read article

Heterogeneous Photoredox Catalysis: Reactions, Materials, and Reaction Engineering

Heterogeneous Photoredox Catalysis: Reactions, Materials, and Reaction Engineering

The preparation of organic compounds through heterogeneous photoredox reactions with the aid of semiconductors has attracted a lot of attention in recent years. We summarize recent advances in the field, including an extended overview of materials, reactors, and engineering.

[Microreview]
Jonathan Z. Bloh, Roland Marschall
Eur. J. Org. Chem., March 10, 2017, https://doi.org/10.1002/ejoc.201601591 Read article

Photoredox-Induced Radical 6-exo-trig Cyclizations onto the Indole Nucleus: Aromative versus Dearomative Pathways

Photoredox‐Induced Radical 6‐exo‐trig Cyclizations onto the Indole Nucleus: Aromative versus Dearomative Pathways

3-Indolyl radicals generated in photoredox-induced cyclizations undergo either exclusive oxidation or highly efficient reduction by amine radical cations. A combined experimental and computational study identifies the elusive structural and electronic factors governing the competing aromative and dearomative reaction pathways.

[Full Paper]
Dirk Alpers, Malte Brasholz, Julia Rehbein
Eur. J. Org. Chem., March 03, 2017, https://doi.org/10.1002/ejoc.201700150 Read article

Hydrogen Atom Transfer (HAT): A Versatile Strategy for Substrate Activation in Photocatalyzed Organic Synthesis

Hydrogen Atom Transfer (HAT): A Versatile Strategy for Substrate Activation in Photocatalyzed Organic Synthesis

Photocatalytic approaches involving the activation of substrates through hydrogen atom transfer (HAT) offer unique opportunities in organic synthesis. This microreview summarizes the most recent advances in this rapidly developing area, collecting the selected examples according to the nature of the species promoting the HAT process.

[Microreview]
Luca Capaldo, Davide Ravelli
Eur. J. Org. Chem., March 02, 2017, https://doi.org/10.1002/ejoc.201601485 Read article

Visible Light [2+2] Photocycloaddition Mediated by Flavin Derivative Immobilized on Mesoporous Silica

Visible Light [2+2] Photocycloaddition Mediated by Flavin Derivative Immobilized on Mesoporous Silica

Drop Anchors! Immobilization of flavin on mesoporous silica MCM-41 was shown to be an effective way to prepare a heterogeneous flavin photocatalyst. Its possible application was demonstrated in visible light [2+2] photocycloaddition which are advantageous when compared to analogous homogeneous procedure.

[Communication]
Jessica Špačková, Eva Svobodová, Tomáš Hartman, Ivan Stibor, Jitka Kopecká, Jana Cibulková, Josef Chudoba, Radek Cibulka
ChemCatChem, March 01, 2017, https://doi.org/10.1002/cctc.201601654 Read article

Metal-Free Visible-Light Radical Iodoperfluoroalkylation of Terminal Alkenes and Alkynes

Metal‐Free Visible‐Light Radical Iodoperfluoroalkylation of Terminal Alkenes and Alkynes

Visible-light-induced iodoperfluoroalkylation of unactivated terminal alkenes and alkynes by using eosin Y is described. This process is effective for various perfluoroalkyl groups including difluoroacetate and alkenes and alkynes possessing a variety of functional groups. This reaction provides a new, metal-free, green method for the synthesis of perfluoroalkylated compounds.

[Communication]
Tomoko Yajima, Mako Ikegami
Eur. J. Org. Chem., February 28, 2017, https://doi.org/10.1002/ejoc.201700077 Read article

Synthesis of Chiral Tetrahydrofurans and Pyrrolidines by Visible-Light-Mediated Deoxygenation

Synthesis of Chiral Tetrahydrofurans and Pyrrolidines by Visible‐Light‐Mediated Deoxygenation

Chiral tetrahydrofurans or pyrrolidines can be readily obtained by deoxygenative photocyclization of allylated 1,2-diols or amino alcohols, respectively. The reactions proceed best in the absence of a sacrificial electron donor, thus accessing the oxidative quenching cycle of the iridium photocatalyst, and by activation of the hydroxy group as the oxalic ester.

[Full Paper]
Daniel Rackl, Viktor Kais, Eugen Lutsker, Oliver Reiser
Eur. J. Org. Chem., February 28, 2017, https://doi.org/10.1002/ejoc.201700014 Read article

Visible-Light-Mediated Oxygenation Reactions using Molecular Oxygen

Visible‐Light‐Mediated Oxygenation Reactions using Molecular Oxygen

Oxygenation reactions promoted by visible light: The development of visible-light-mediated oxygenation reactions utilizing molecular oxygen has been briefly summarized based on the type of newly formed chemical bond. Synthetic organic methodologies and mechanistic studies have been discussed.

[Focus Review]
Changliang Bian, Atul K. Singh, Linbin Niu, Hong Yi, Aiwen Lei
Asian J. Org. Chem., February 27, 2017, https://doi.org/10.1002/ajoc.201600563 Read article

One-Step and Surfactant-Free Fabrication of Gold-Nanoparticle-Decorated Bismuth Oxychloride Nanosheets Based on Laser Ablation in Solution and Their Enhanced Visible-Light Plasmonic Photocatalysis

One‐Step and Surfactant‐Free Fabrication of Gold‐Nanoparticle‐Decorated Bismuth Oxychloride Nanosheets Based on Laser Ablation in Solution and Their Enhanced Visible‐Light Plasmonic Photocatalysis

Go for gold: Gold-nanoparticle-decorated BiOCl nanosheets are fabricated in one step based on laser ablation of a gold target in a hydrochloric acid solution of bismuth nitrate without surfactant. They exhibit significantly enhanced photocatalytic activity on organic pollutants under visible-light irradiation and with good recycling performance.

[Article]
Yi Wei, Hongjian Zhou, Hongwen Zhang, Xiaoguang Zhu, Guangqiang Liu, Yue Li, Weiping Cai
ChemPhysChem, February 22, 2017, https://doi.org/10.1002/cphc.201601261 Read article

Ultrathin Anatase TiO2 Nanosheets for High-Performance Photocatalytic Hydrogen Production

Ultrathin Anatase TiO2 Nanosheets for High‐Performance Photocatalytic Hydrogen Production

Ultrathin anatase TiO2 nanosheets of ≈2.5 nm in thickness and ≈200 nm in side-length are prepared with an ethanol solvothermal route, giving rise to ≈97% {001} facets exposed. Such nanosheets exhibit an H2 evolution rate as high as 17.86 mmol h−1 g−1, and the corresponding apparent quantum efficiency has been determined to be 34.2%.

[Communication]
Ming Li, Ying Chen, Wei Li, Xiang Li, He Tian, Xiao Wei, Zhaohui Ren, Gaorong Han
Small, February 20, 2017, https://doi.org/10.1002/smll.201604115 Read article

Visible-Light Photocatalysis as an Enabling Tool for the Functionalization of Unactivated C(sp3)-Substrates

Visible‐Light Photocatalysis as an Enabling Tool for the Functionalization of Unactivated C(sp3)‐Substrates

[Microreview]
Sara Roslin, Luke R. Odell
Eur. J. Org. Chem., February 20, 2017, https://doi.org/10.1002/ejoc.201601479 Read article

Photocatalytic Oxidation of Sulfinates to Vinyl Sulfones with Cyanamide-Functionalised Carbon Nitride

Photocatalytic Oxidation of Sulfinates to Vinyl Sulfones with Cyanamide‐Functionalised Carbon Nitride

The cyanamide-functionalised carbon nitride (NCN-CNx) can act as a photocatalyst for the sulfonylation of alkenes with sulfinate salts with product yields comparable to those obtained with the benchmark Eosin Y, while benefiting from the advantages of heterogeneous catalysis, i.e. ease of catalyst recovery for multiple re-use.

[Full Paper]
Andreas Uwe Meyer, Vincent Wing-hei Lau, Burkhard König, Bettina V. Lotsch
Eur. J. Org. Chem., February 16, 2017, https://doi.org/10.1002/ejoc.201601637 Read article

Photoredox-Catalyzed Cyclopropanation of Michael Acceptors

Photoredox‐Catalyzed Cyclopropanation of Michael Acceptors

A new protocol for the cyclopropanation of α,β-unsaturated carbonyl compounds with simple diiodomethane has been developed by means of photoredox catalysis. The process involves the photocatalytic generation of the iodomethyl radical, a novel carbenoid species able to transfer a CH2 group to a wide variety of Michael acceptors in a stereocontrolled manner.

[Communication]
Ana M. del Hoyo, Marcos García Suero
Eur. J. Org. Chem., February 16, 2017, https://doi.org/10.1002/ejoc.201601604 Read article

SILAR BiOI-Sensitized TiO2 Films for Visible-Light Photocatalytic Degradation of Rhodamine B and 4-Chlorophenol

SILAR BiOI‐Sensitized TiO2 Films for Visible‐Light Photocatalytic Degradation of Rhodamine B and 4‐Chlorophenol

Even better than the real thing: A photocatalyst composed of BiOI nanoplates deposited onto a film of TiO2 nanoparticles is an efficient degrader of rhodamine B and 4-chlorophenol, especially in comparison to TiO2-only films.

[Article]
Gylen Odling, Neil Robertson
ChemPhysChem, February 15, 2017, https://doi.org/10.1002/cphc.201601417 Read article

Erythrosine B Catalyzed Visible-Light Photoredox Arylation–Cyclization of N-Alkyl-N-aryl-2-(trifluoromethyl)acrylamides to 3-(Trifluoromethyl)indolin-2-one Derivatives

Erythrosine B Catalyzed Visible‐Light Photoredox Arylation–Cyclization of N‐Alkyl‐N‐aryl‐2‐(trifluoromethyl)acrylamides to 3‐(Trifluoromethyl)indolin‐2‐one Derivatives

Erythrosine B has been utilized as a novel photoredox sensitizer in the arylation-cyclization reaction of N-alkyl-N-aryl-2-(trifluoromethyl)acrylamides to indolin-2-ones. Arenediazonium tetrafluoroborates served as the source aryl radicals under the irradiation of blue LEDs at –50 °C. The scope and the limitations were investigated, and 27 examples (up to 83 % yield) are presented.

[Communication]
Zsombor Gonda, Ferenc Béke, Orsolya Tischler, Milán Petró, Zoltán Novák, Balázs L. Tóth
Eur. J. Org. Chem., February 10, 2017, https://doi.org/10.1002/ejoc.201601493 Read article

Interfacial Charge Transfer in Photoelectrochemical Processes

Interfacial Charge Transfer in Photoelectrochemical Processes

The importance of interfacial charge transfer and photogenerated charge separation at various interfaces involving semiconductors is discussed. Optimization leads to highly efficient photo-electrochemical water splitting and properties of solar energy devices. Various interfaces such as semiconductor–electrolyte, semiconductor–semiconductor, semiconductor–metal, and semiconductor–molecules are discussed and found to be involved in photo-electrochemical processes.

[Review]
Sandeep Kumar, Kasinath Ojha, Ashok K. Ganguli
Adv. Mater. Interfaces, February 09, 2017, https://doi.org/10.1002/admi.201600981 Read article

Superoxide Radical Anion-Mediated Aerobic Oxidative Synthesis of 2-Substituted Quinazolines under Visible Light

Superoxide Radical Anion‐Mediated Aerobic Oxidative Synthesis of 2‐Substituted Quinazolines under Visible Light

Superoxide is SUPER! A facile and efficient one-pot reaction for the aerobic oxidative synthesis of 2-substituted quinazolines using visible light catalysis has been developed. Electron paramagnetic resonance (EPR) measurements provide clear evidence on the formation of superoxide radical anion (O2), which is responsible for this transformation, rather than singlet oxygen (1O2).

[Communication]
Xiu-Long Yang, Qing-Yuan Meng, Xue-Wang Gao, Tao Lei, Cheng-Juan Wu, Bin Chen, Chen-Ho Tung, Li-Zhu Wu
Asian J. Org. Chem., February 03, 2017, https://doi.org/10.1002/ajoc.201600550 Read article

Decarboxylative Giese-Type Reaction of Carboxylic Acids Promoted by Visible Light: A Sustainable and Photoredox-Neutral Protocol

Decarboxylative Giese‐Type Reaction of Carboxylic Acids Promoted by Visible Light: A Sustainable and Photoredox‐Neutral Protocol

The decarboxylative alkylation of carboxylic acids can be efficiently promoted by visible light under air at room temperature by using 9-mesitylene-10-methylacridinium perchlorate ([Acr-Mes]ClO4) as photocatalyst. A range of readily available starting materials are well tolerated in this transition-metal-free protocol.

[Full Paper]
Nieves P. Ramirez, Jose C. Gonzalez-Gomez
Eur. J. Org. Chem., January 31, 2017, https://doi.org/10.1002/ejoc.201601478 Read article

Porphyrin-Catalyzed Photochemical C–H Arylation of Heteroarenes

Porphyrin‐Catalyzed Photochemical C–H Arylation of Heteroarenes

Porphyrins are suitable photoredox catalysts for the direct C–H arylation of heteroarenes with aryl diazonium salts. The reaction involves photoelectron transfer from a porphyrin in its exited state to a diazonium salt.

[Communication]
Katarzyna Rybicka-Jasińska, Burkhard König, Dorota Gryko
Eur. J. Org. Chem., January 27, 2017, https://doi.org/10.1002/ejoc.201601518 Read article

A Photocatalytic Meerwein Approach to the Synthesis of Isochromanones and Isochromenones

A Photocatalytic Meerwein Approach to the Synthesis of Isochromanones and Isochromenones

A mild and facile photoredox approach towards synthetically interesting isochromanones and isochromenones is presented. The diazonium salts of various functionalised anthranilic acids have been converted by reaction with various alkenes into the desired bi- and tricyclic compounds in good to excellent yields.

[Full Paper]
Stefano Crespi, Stefanie Jäger, Burkhard König, Maurizio Fagnoni
Eur. J. Org. Chem., January 27, 2017, https://doi.org/10.1002/ejoc.201601458 Read article

Flavin-Mediated Visible-Light [2+2] Photocycloaddition of Nitrogen- and Sulfur-Containing Dienes

Flavin‐Mediated Visible‐Light [2+2] Photocycloaddition of Nitrogen‐ and Sulfur‐Containing Dienes

The photoorganocatalytic [2+2] cycloaddition of dienes mediated by flavin derivative 1 and visible light affords a variety of aza and thia analogues of bicyclo[3.2.0]heptanes with high diastereoselectivities.

[Full Paper]
Michael Jirásek, Karolína Straková, Tomáš Neveselý, Eva Svobodová, Zdeňka Rottnerová, Radek Cibulka
Eur. J. Org. Chem., January 26, 2017, https://doi.org/10.1002/ejoc.201601377 Read article

Photocatalytic Trifluoromethylthiolation of Aromatic Alkenes Associated with Hydroxylation and Alkoxylation

Photocatalytic Trifluoromethylthiolation of Aromatic Alkenes Associated with Hydroxylation and Alkoxylation

Activator-free: An additive-free photoredox-catalyzed trifluoromethylthiolation of aromatic alkenes has been developed. Trifluoromethanesulfenyl radical (.SCF3) is efficiently generated from a photocatalyst and an electrophilic triflouromethylthiolating reagent. This photoredox system induces a regioselective oxytrifluoromethylthiolation of carbon–carbon double bonds through catalytic processes without any activator.

[Communication]
Yanjie Li, Takashi Koike, Munetaka Akita
Asian J. Org. Chem., January 18, 2017, https://doi.org/10.1002/ajoc.201600562 Read article

Visible-light-catalyzed Tandem Difluoroacetylation–Intramolecular Cyclization of 1,3-Diarylpropynones: Access to Difluoroacetylated Indenones

Visible‐light‐catalyzed Tandem Difluoroacetylation–Intramolecular Cyclization of 1,3‐Diarylpropynones: Access to Difluoroacetylated Indenones

Only visible light can do that: A mild and efficient synthesis of 3-aryl-2-difluoroacetyl indenones via visible-light-catalyzed difluoroacetylation of 1,3-diarylpropynones followed by intramolecular radical cyclization is reported. The reaction exhibits high regioselectivity and functional group tolerance.

[Full Paper]
Savita B. Nagode, Atul Kumar Chaturvedi, Namrata Rastogi
Asian J. Org. Chem., January 17, 2017, https://doi.org/10.1002/ajoc.201600549 Read article

Visible-Light, Photoredox-Mediated Oxidative Tandem Nitroso-Diels–Alder Reaction of Arylhydroxylamines with Conjugated Dienes

Visible‐Light, Photoredox‐Mediated Oxidative Tandem Nitroso‐Diels–Alder Reaction of Arylhydroxylamines with Conjugated Dienes

[Communication]
Veronica Santacroce, Raphael Duboc, Max Malacria, Giovanni Maestri, Geraldine Masson
Eur. J. Org. Chem., December 30, 2016, https://doi.org/10.1002/ejoc.201601492 Read article

Sunflow: Sunlight Drives Fast and Green Photochemical Flow Reactions in Simple Microcapillary Reactors – Application to Photoredox and H-Atom-Transfer Chemistry

Sunflow: Sunlight Drives Fast and Green Photochemical Flow Reactions in Simple Microcapillary Reactors – Application to Photoredox and H‐Atom‐Transfer Chemistry

“Sunflow” – The combination of a microcapillary reactor and sunlight enables fast and green photoredox and H-atom-transfer reactions in continuous flow. Kinetic studies reveal high reaction rates with a simple and inexpensive reactor setup (less than 90 USD acquisition value).

[Communication]
Alexander M. Nauth, Alexander Lipp, Benjamin Lipp, Till Opatz
Eur. J. Org. Chem., December 28, 2016, https://doi.org/10.1002/ejoc.201601394 Read article

A Palladium/Light System Combined with Hanztsch Ester: Radical Vinylation of Alkyl Iodides with Vinyl Bromides

A Palladium/Light System Combined with Hanztsch Ester: Radical Vinylation of Alkyl Iodides with Vinyl Bromides

Radical vinylation of alkyl iodides with vinyl bromides proceeds smoothly with a combined Pd/light/Hanztsch ester system. In this reaction system, the Hanztsch ester acts as an effective reducing reagent of PdII to Pd0 that generates key alkyl radicals via single electron transfer (SET) with alkyl iodides upon photo-excitation.

[Communication]
Shuhei Sumino, Ilhyong Ryu
Asian J. Org. Chem., December 27, 2016, https://doi.org/10.1002/ajoc.201600547 Read article

A Simplified Fe-Based PhotoATRP Using Only Monomers and Solvent

A Simplified Fe‐Based PhotoATRP Using Only Monomers and Solvent

Well-defined polymers are obtained through photoinduced atom transfer radical polymerization (photoATRP) by iron(III) as an air-stable catalyst. This system only requires monomer, FeBr3 in MeCN without any additional ATRP initiator, ligand, radical initiator, or reducing agent. This low cost method also shows temporal control and high chain end functionality.

[Communication]
Xiangcheng Pan, Nikhil Malhotra, Sajjad Dadashi-Silab, Krzysztof Matyjaszewski
Macromol. Rapid Commun., December 20, 2016, https://doi.org/10.1002/marc.201600651 Read article

Step Transfer-Addition and Radical-Termination (START) Polymerization of α,ω-Unconjugated Dienes under Irradiation of Blue LED Light

Step Transfer‐Addition and Radical‐Termination (START) Polymerization of α,ω‐Unconjugated Dienes under Irradiation of Blue LED Light

A novel polymerization method, step transfer-addition and radical-termination, suitable for α,ω-unconjugated dienes has been discovered through the construction of perfluorocarbon-containing alternating copolymers under irradiation of visible light at room temperature for the first time.

[Communication]
Tianchi Xu, Hongnan Yin, Xiaohong Li, Lifen Zhang, Zhenping Cheng, Xiulin Zhu
Macromol. Rapid Commun., November 11, 2016, https://doi.org/10.1002/marc.201600587 Read article

Aerobic Oxidation of Benzylic sp3 C−H Bonds through Cooperative Visible-Light Photoredox Catalysis of N-Hydroxyimide and Dicyanopyrazine

Aerobic Oxidation of Benzylic sp3 C−H Bonds through Cooperative Visible‐Light Photoredox Catalysis of N‐Hydroxyimide and Dicyanopyrazine

Two for the price of 1: A cooperative photoredox catalysis system between dicyanopyrazine-derived chromophore (DPZ) and N-hydroxyimide has been developed. This cooperative catalytic system facilitated the aerobic oxygenation of a series of benzylic sp3 C−H bonds through a photoredox pathway, affording valuable carbonyl compounds.

[Communication]
Xinfei Liu, Lu Lin, Xinyi Ye, Choon-Hong Tan, Zhiyong Jiang
Asian J. Org. Chem., November 07, 2016, https://doi.org/10.1002/ajoc.201600426 Read article

Metal-Free Atom Transfer Radical Polymerization of Methyl Methacrylate with ppm Level of Organic Photocatalyst

Metal‐Free Atom Transfer Radical Polymerization of Methyl Methacrylate with ppm Level of Organic Photocatalyst

A novel photocatalyst 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene is successfully used to mediate a metal-free atom transfer radical polymerization of methyl methacrylate just with ppm level usage under irradiation of blue light emitting diode at room temperature.

[Communication]
Zhicheng Huang, Yu Gu, Xiaodong Liu, Lifen Zhang, Zhenping Cheng, Xiulin Zhu
Macromol. Rapid Commun., October 28, 2016, https://doi.org/10.1002/marc.201600461 Read article

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