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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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Heterojunction Photocatalysts

Heterojunction Photocatalysts

Heterojunction photocatalysts attract a lot of attention because of their effectiveness for spatial separation of photogenerated electron–hole pairs. Therefore, various types of heterojunction photocatalyst are applied in different photocatalytic fields, including H2 production, CO2 reduction, and pollutant degradation. The development of heterojunction photocatalysts can lead to significant advancements in the photocatalysis field.

[Review]
Jingxiang Low, Jiaguo Yu, Mietek Jaroniec, Swelm Wageh, Ahmed A. Al-Ghamdi
Adv. Mater., February 21, 2017, DOI: 10.1002/adma.201601694. 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, DOI: 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, DOI: 10.1002/ejoc.201601479. Read article

Metal–Organic Framework Photosensitized TiO2 Co-catalyst: A Facile Strategy to Achieve a High Efficiency Photocatalytic System

Metal–Organic Framework Photosensitized TiO2 Co‐catalyst: A Facile Strategy to Achieve a High Efficiency Photocatalytic System

To dye for: A 3D metal–organic framework constructed from an anthracene derivative was employed as an efficient sensitizer for anatase TiO2. The co-catalyst was prepared by mechanical mixing, which should be regarded as the simplest synthetic strategy in materials science. The co-catalyst can efficiently photo-eliminate organic dyes under visible light irradiation. Photodegradation experiments were carried out to study the possible mechanism.

[Full Paper]
Ming-Hua Xie, Rong Shao, Xin-Guo Xi, Gui-Hua Hou, Rong-Feng Guan, Peng-Yu Dong, Qin-Fang Zhang, Xiu-Li Yang
Chem. Eur. J., February 20, 2017, DOI: 10.1002/chem.201605282. Read article

A Redox Shuttle Accelerates O2 Evolution of Photocatalysts Formed In Situ under Visible Light

A Redox Shuttle Accelerates O2 Evolution of Photocatalysts Formed In Situ under Visible Light

A redox shuttle strategy is demonstrated to be a promising approach to accelerate hole removal for efficient O2 production with mesoporous graphitic carbon nitride, WO3, BiVO4, NiTi-LDH, and Ag3PO4 water-oxidation catalysts under visible-light irradiation.

[Communication]
Jia-Xin Li, Chen Ye, Xu-Bing Li, Zhi-Jun Li, Xue-Wang Gao, Bin Chen, Chen-Ho Tung, Li-Zhu Wu
Adv. Mater., February 20, 2017, DOI: 10.1002/adma.201606009. Read article

Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation

Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation

Improving photocatalysts: Sufficient donor density in LaTiO2N photocatalysts is essential to generate an efficient internal electric field for charge separation and for high oxidizing power of the holes. On the basis of this understanding, LaTiO2N photocatalysts were modified to give a quantum efficiency for water oxidation of 25 % at 450 nm, which is higher than that of conventional LaTiO2N.

[Full Paper]
Feng-Qiang Xiong, Lipeng Wan, Yue Li, Tiju Thomas, Francis J. DiSalvo, Minghui Yang
ChemSusChem, February 17, 2017, DOI: 10.1002/cssc.201601602. 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, DOI: 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, DOI: 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, DOI: 10.1002/cphc.201601417. Read article

Anatase TiO2 Mesocrystals: Green Synthesis, In Situ Conversion to Porous Single Crystals, and Self-Doping Ti3+ for Enhanced Visible Light Driven Photocatalytic Removal of NO

Anatase TiO2 Mesocrystals: Green Synthesis, In Situ Conversion to Porous Single Crystals, and Self‐Doping Ti3+ for Enhanced Visible Light Driven Photocatalytic Removal of NO

Porous crystals: A green synthetic approach has been developed for the production of spindle-shaped anatase TiO2 mesocrystals, which could be easily transformed to porous single crystals or Ti3+ self-doped anatase mesocrystals upon heat treatment. The thus-transformed Ti3+ self-doped anatase mesocrystals exhibited enhanced visible light activity toward photocatalytic removal of NO.

[Full Paper]
Biying Tan, Xuehao Zhang, Yongjun Li, Hao Chen, Xiaozhou Ye, Yun Wang, Jianfeng Ye
Chem. Eur. J., February 15, 2017, DOI: 10.1002/chem.201605294. Read article

H2 Generation with (Mixed) Plasmonic Cu/Au-TiO2 Photocatalysts: Structure–Reactivity Relationships Assessed by in situ Spectroscopy

H2 Generation with (Mixed) Plasmonic Cu/Au‐TiO2 Photocatalysts: Structure–Reactivity Relationships Assessed by in situ Spectroscopy

All that glitters isn't gold: The impact of different metal deposition methods on light-driven H2 production is studied. Au/Cu alloy particles formed by coprecipitation evolve much more H2 under visible light than separate Au0 and Cu0 particles formed by stepwise precipitation. The opposite is true under UV light.

[Full Paper]
Jacqueline B. Priebe, Jörg Radnik, Carsten Kreyenschulte, Alastair J. J. Lennox, Henrik Junge, Matthias Beller, Angelika Brückner
ChemCatChem, February 14, 2017, DOI: 10.1002/cctc.201601361. Read article

Stable Hydrophobic Metal-Oxide Photocatalysts via Grafting Polydimethylsiloxane Brush

Stable Hydrophobic Metal‐Oxide Photocatalysts via Grafting Polydimethylsiloxane Brush

Polydimethylsiloxane (PDMS) can be grafted to metal-oxide photocatalysts such as titanium oxide by simple UV irradiation in solution or melt. The PDMS graft metal oxides are still photocatalytically active. They are hydrophobic, liquid repellent, self-cleaning, prevent biofouling and are long-term stable even in UV light.

[Communication]
Sanghyuk Wooh, Noemí Encinas, Doris Vollmer, Hans-Jürgen Butt
Adv. Mater., February 14, 2017, DOI: 10.1002/adma.201604637. 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, DOI: 10.1002/ejoc.201601493. Read article

Alkali-Assisted Synthesis of Nitrogen Deficient Graphitic Carbon Nitride with Tunable Band Structures for Efficient Visible-Light-Driven Hydrogen Evolution

Alkali‐Assisted Synthesis of Nitrogen Deficient Graphitic Carbon Nitride with Tunable Band Structures for Efficient Visible‐Light‐Driven Hydrogen Evolution

A facile synthetic strategy for nitrogen deficient graphitic carbon nitride (g-C3Nx) is established, involving a simple alkali-assisted thermal polymerization of urea, melamine, or thiourea. In situ introduced nitrogen vacancies significantly redshift the absorption edge of g-C3Nx, with the defect concentration depending on the alkali to nitrogen precursor ratio. The g-C3Nx products show superior visible-light photocatalytic performance compared to pristine g-C3N4.

[Communication]
Huijun Yu, Run Shi, Yunxuan Zhao, Tong Bian, Yufei Zhao, Chao Zhou, Geoffrey I. N. Waterhouse, Li-Zhu Wu, Chen-Ho Tung, Tierui Zhang
Adv. Mater., February 10, 2017, DOI: 10.1002/adma.201605148. 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, DOI: 10.1002/admi.201600981. Read article

A Hydrazone-Based Covalent Organic Framework as an Efficient and Reusable Photocatalyst for the Cross-Dehydrogenative Coupling Reaction of N-Aryltetrahydroisoquinolines

A Hydrazone‐Based Covalent Organic Framework as an Efficient and Reusable Photocatalyst for the Cross‐Dehydrogenative Coupling Reaction of N‐Aryltetrahydroisoquinolines

Heterogeneous COF photocatalyst: A hydrazone-based covalent organic framework (COF) is employed as a highly efficient, recyclable heterogeneous photocatalyst in cross-dehydrogenative coupling (CDC) reactions. This approach highlights the potential of developing photoactive COFs as highly active photocatalysts for a variety of important organic transformations.

[Communication]
Wanting Liu, Qing Su, Pengyao Ju, Bixuan Guo, Hui Zhou, Guanghua Li, Qiaolin Wu
ChemSusChem, February 07, 2017, DOI: 10.1002/cssc.201601702. Read article

In Situ Grown Pristine Cobalt Sulfide as Bifunctional Photocatalyst for Hydrogen and Oxygen Evolution

In Situ Grown Pristine Cobalt Sulfide as Bifunctional Photocatalyst for Hydrogen and Oxygen Evolution

3D hierarchical cobalt sulfide acts as robust bifunctional photocatalysts for visible-light-driven hydrogen evolution with triethanolamine and eosin-Y, and oxygen evolution with Na2S2O8 and [Ru(bpy)3]2+.

[Full Paper]
Min Zheng, Yong Ding, Li Yu, Xiaoqiang Du, Yukun Zhao
Adv. Funct. Mater., February 06, 2017, DOI: 10.1002/adfm.201605846. Read article

Hierarchical Porous O-Doped g-C3N4 with Enhanced Photocatalytic CO2 Reduction Activity

Hierarchical Porous O‐Doped g‐C3N4 with Enhanced Photocatalytic CO2 Reduction Activity

Metal-free g-C3N4 with layered structure has tremendous potential in photocatalytic solar-to-fuels conversion. A novel strategy is applied to design hierarchical O-doped g-C3N4 nanotubes with excellent activity for photocatalytic CO2 reduction into hydrocarbon fuels (CH3OH).

[Full Paper]
Junwei Fu, Bicheng Zhu, Chuanjia Jiang, Bei Cheng, Wei You, Jiaguo Yu
Small, February 03, 2017, DOI: 10.1002/smll.201603938. 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, DOI: 10.1002/ajoc.201600550. Read article

Cobalt Phosphide Modified Titanium Oxide Nanophotocatalysts with Significantly Enhanced Photocatalytic Hydrogen Evolution from Water Splitting

Cobalt Phosphide Modified Titanium Oxide Nanophotocatalysts with Significantly Enhanced Photocatalytic Hydrogen Evolution from Water Splitting

For the first time, novel CoP/TiO2 hybrid nanophotocatalyst is successfully constructed, exhibiting high separation of photoexcited charge carriers and retarding the recombination of electron–hole pairs, excellent photocatalytic H2 evolution performance, and sufficient photostability. The obtained structure as photocatalysts has advantageous factors for both the material and structure, and achieves significantly enhanced photoconversion efficiency.

[Full Paper]
Xinzheng Yue, Shasha Yi, Runwei Wang, Zongtao Zhang, Shilun Qiu
Small, February 02, 2017, DOI: 10.1002/smll.201603301. Read article

Progressive Design of Plasmonic Metal–Semiconductor Ensemble toward Regulated Charge Flow and Improved Vis–NIR-Driven Solar-to-Chemical Conversion

Progressive Design of Plasmonic Metal–Semiconductor Ensemble toward Regulated Charge Flow and Improved Vis–NIR‐Driven Solar‐to‐Chemical Conversion

The tunable, progressive harvesting of visible-to-near infrared light (vis–NIR, λ > 570 nm) by designing plasmonic Au nanorods (NRs) and metal (Au, Ag, or Pt) nanoparticle (NP) codecorated 1D CdS nanowire ensemble is reported. Such cooperative synergy with tunable control of interfacial interaction, morphology optimization, and cocatalyst strategy results in the distinctly boosted performance for vis–NIR-driven plasmonic photocatalysis.

[Full Paper]
Chuang Han, Quan Quan, Hao Ming Chen, Yugang Sun, Yi-Jun Xu
Small, February 02, 2017, DOI: 10.1002/smll.201602947. 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, DOI: 10.1002/ejoc.201601478. Read article

Carbonyl-Grafted g-C3N4 Porous Nanosheets for Efficient Photocatalytic Hydrogen Evolution

Carbonyl‐Grafted g‐C3N4 Porous Nanosheets for Efficient Photocatalytic Hydrogen Evolution

Behind the sheets: Carbonyl-grafted g-C3N4 porous nanosheets (COCNPNS) were fabricated by a two-step thermal process using melamine and oxalic acid as starting reagents followed by thermal etching by O2 (see figure). Under visible-light illumination, the prepared COCNPNS exhibited a superior photocatalytic hydrogen evolution rate.

[Full Paper]
Feng-Yun Su, Wei-De Zhang
Chem. Asian J., January 31, 2017, DOI: 10.1002/asia.201601518. 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, DOI: 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, DOI: 10.1002/ejoc.201601458. Read article

Urea-Modified Carbon Nitrides: Enhancing Photocatalytic Hydrogen Evolution by Rational Defect Engineering

Urea‐Modified Carbon Nitrides: Enhancing Photocatalytic Hydrogen Evolution by Rational Defect Engineering

Defective design: graphitic carbon nitride is modified with the urea moiety as a photocatalytically relevant “defect,” yielding a material with a sacrificial photocatalytic hydrogen evolution rate well over an order of magnitude higher than that of the unmodified counterpart. The outperformance is attributed to metal-support interaction between the urea group and the Pt cocatalyst, thereby facilitating interfacial electron transfer.

[Full Paper]
Vincent Wing-hei Lau, Victor Wen-zhe Yu, Florian Ehrat, Tiago Botari, Igor Moudrakovski, Thomas Simon, Viola Duppel, Elise Medina, Jacek Stolarczyk, Jochen Feldmann, Volker Blum, Bettina V. Lotsch
Adv. Energy Mater., January 27, 2017, DOI: 10.1002/aenm.201602251. Read article

Homoleptic Zinc(II) Complexes Based on 4′-(2-Thienyl)-terpyridine: Preparation, Structures, and Properties

Homoleptic Zinc(II) Complexes Based on 4′‐(2‐Thienyl)‐terpyridine: Preparation, Structures, and Properties

[Article]
Jianxin Zhang, Xia Yan
Z. Anorg. Allg. Chem., January 26, 2017, DOI: 10.1002/zaac.201600349. 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, DOI: 10.1002/ejoc.201601377. Read article

Ultrafast Spin Crossover in [FeII(bpy)3]2+: Revealing Two Competing Mechanisms by Extreme Ultraviolet Photoemission Spectroscopy

Ultrafast Spin Crossover in [FeII(bpy)3]2+: Revealing Two Competing Mechanisms by Extreme Ultraviolet Photoemission Spectroscopy

Following the photoexcitation event, the aqueous iron coordination complex [FeII(bpy)3]2+ undergoes a low-to-high spin transition. Ultrafast XUV (extreme ultraviolet) photoemission spectroscopy enables tracking both the direct and the sequential pathways of this process.

[Communication]
Alexandre Moguilevski, Martin Wilke, Gilbert Grell, Sergey I. Bokarev, Saadullah G. Aziz, Nicholas Engel, Azhr A. Raheem, Oliver Kühn, Igor Yu. Kiyan, Emad F. Aziz
ChemPhysChem, January 19, 2017, DOI: 10.1002/cphc.201601396. 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, DOI: 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, DOI: 10.1002/ajoc.201600549. Read article

Synthesis of Ternary and Quaternary Au and Pt Decorated CdSe/CdS Heteronanoplatelets with Controllable Morphology

Synthesis of Ternary and Quaternary Au and Pt Decorated CdSe/CdS Heteronanoplatelets with Controllable Morphology

Metal–semiconductor inorganic (ternary and quaternary) nanoheteroplatelets are synthesized by growing Au and/or Pt domains on CdSe/CdS nanoplatelets of variable core and crown dimensions. The nanoplatelets are phase transferred to water and found to be an efficient catalyst for H2 fuel generation with compelling apparent quantum efficiency as high as ≈19.3% under white light illumination.

[Full Paper]
Suraj Naskar, Franziska Lübkemann, Saher Hamid, Axel Freytag, Andreas Wolf, Julian Koch, Irina Ivanova, Herbert Pfnür, Dirk Dorfs, Detlef W. Bahnemann, Nadja C. Bigall
Adv. Funct. Mater., January 16, 2017, DOI: 10.1002/adfm.201604685. 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, DOI: 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, DOI: 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, DOI: 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, DOI: 10.1002/marc.201600651. Read article

Creating Carbon–Oxygen Bonds over TiO2 Nanofibers for Synergistic Benefits of Visible-Light Response and Charge Separation toward Photocatalysis

Creating Carbon–Oxygen Bonds over TiO2 Nanofibers for Synergistic Benefits of Visible‐Light Response and Charge Separation toward Photocatalysis

The controllable carbonization over TiO2 nanofibers developed to create carbon–oxygen bonding interface, which cannot only inject visible-light sensitivity but also hasten electrons into highly conductive graphite surface, thus boosting charge production and separation. This work renders synergistic regulations of optical and electronic benefits for TiO2 photocatalysts.

[Communication]
Xiaoyong Xu, Yali Wang, Rui Wang, Jing Pan, Jingguo Hu, Haibo Zeng
Adv. Mater. Interfaces, December 05, 2016, DOI: 10.1002/admi.201600795. 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, DOI: 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, DOI: 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, DOI: 10.1002/marc.201600461. Read article

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