Photocatalytic Sonogashira reaction over silicon carbide supported Pd–Cu alloy nanoparticles under visible light irradiation

2018 ◽  
Vol 8 (13) ◽  
pp. 3357-3362 ◽  
Author(s):  
Bing Wang ◽  
Yingyong Wang ◽  
Jiazhou Li ◽  
Xiaoning Guo ◽  
Gailing Bai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Sonogashira Reaction ◽  
Alloy Nanoparticles ◽  
Mild Conditions ◽  
Cu Alloy ◽  
Ligand Free ◽  
Supported Pd

PdCu alloy nanoparticles supported on SiC can efficiently catalyze the Sonogashira reaction by visible light irradiation under ligand-free and mild conditions. The superior catalytic activity of PdCu catalysts was caused by the synergistic effect of PdCu alloy nanoparticles.

Selective reduction of nitroaromatics to azoxy compounds on supported Ag–Cu alloy nanoparticles through visible light irradiation

2016 ◽  
Vol 18 (3) ◽  
pp. 817-825 ◽  
Author(s):  
Zhe Liu ◽  
Yiming Huang ◽  
Qi Xiao ◽  
Huaiyong Zhu
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Selective Reduction ◽  
Photocatalytic Reduction ◽  
Light Irradiation ◽  
Azo Compounds ◽  
Alloy Nanoparticles ◽  
Ag Nps ◽  
Azoxy Compounds ◽  
Cu Alloy

The photocatalytic reduction of nitroaromatics on Ag–Cu alloy NPs can maintain the selectivity to azoxy compounds, whereas Ag NPs mainly obtain azo compounds.

scholarly journals TiO2 Photocatalyzed C–H Bond Transformation for C–C Coupling Reactions

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 355 ◽  
Author(s):  
Yi Wang ◽  
Anan Liu ◽  
Dongge Ma ◽  
Shuhong Li ◽  
Chichong Lu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Transition Metal Catalysis ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Metal Catalysis ◽  
Bond Functionalization ◽  
Tio2 Photocatalysis ◽  
Mild Conditions

Fulfilling the direct inert C–H bond functionalization of raw materials that are earth-abundant and commercially available for the synthesis of diverse targeted organic compounds is very desirable and its implementation would mean a great reduction of the synthetic steps required for substrate prefunctionalization such as halogenation, borylation, and metalation. Successful C–H bond functionalization mainly resorts to homogeneous transition-metal catalysis, albeit sometimes suffering from poor catalyst reusability, nontrivial separation, and severe biotoxicity. TiO2 photocatalysis displays multifaceted advantages, such as strong oxidizing ability, high chemical stability and photostability, excellent reusability, and low biotoxicity. The chemical reactions started and delivered by TiO2 photocatalysts are well known to be widely used in photocatalytic water-splitting, organic pollutant degradation, and dye-sensitized solar cells. Recently, TiO2 photocatalysis has been demonstrated to possess the unanticipated ability to trigger the transformation of inert C–H bonds for C–C, C–N, C–O, and C–X bond formation under ultraviolet light, sunlight, and even visible-light irradiation at room temperature. A few important organic products, traditionally synthesized in harsh reaction conditions and with specially functionalized group substrates, are continuously reported to be realized by TiO2 photocatalysis with simple starting materials under very mild conditions. This prominent advantage—the capability of utilizing cheap and readily available compounds for highly selective synthesis without prefunctionalized reactants such as organic halides, boronates, silanes, etc.—is attributed to the overwhelmingly powerful photo-induced hole reactivity of TiO2 photocatalysis, which does not require an elevated reaction temperature as in conventional transition-metal catalysis. Such a reaction mechanism, under typically mild conditions, is apparently different from traditional transition-metal catalysis and beyond our insights into the driving forces that transform the C–H bond for C–C bond coupling reactions. This review gives a summary of the recent progress of TiO2 photocatalytic C–H bond activation for C–C coupling reactions and discusses some model examples, especially under visible-light irradiation.

An effective photothermal dual-responsive Pd1Cu4/CexOy catalyst for Suzuki–Miyaura coupling reactions under mild conditions

2020 ◽  
Vol 44 (9) ◽  
pp. 3794-3801
Author(s):  
Bo Liu ◽  
Tong Xu ◽  
Chunping Li ◽  
Jie Bai
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Suzuki Reactions ◽  
Mild Conditions ◽  
Dual Responsive

A Pd1Cu4/CexOy catalyst can efficiently catalyze Suzuki reactions under both heating and visible light irradiation conditions.

An uncommon use of irradiated flavins: Brønsted acid catalysis

2020 ◽  
Vol 56 (42) ◽  
pp. 5661-5664
Author(s):  
Yukihiro Arakawa ◽  
Tomohiro Mihara ◽  
Hiroki Fujii ◽  
Keiji Minagawa ◽  
Yasushi Imada
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Acid Catalysis ◽  
Light Irradiation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Visible light irradiation to flavins in the presence of thiols and O2 provides Brønsted acidic species that can be used as efficient catalysts for thioacetalizations and for Mannich-type reactions under non-irradiation and mild conditions.

Photocatalytic degradation of naproxen by a H2O2-modified titanate nanomaterial under visible light irradiation

2019 ◽  
Vol 9 (17) ◽  
pp. 4614-4628 ◽  
Author(s):  
Gongduan Fan ◽  
Jiajun Zhan ◽  
Jing Luo ◽  
Jin Zhang ◽  
Zhong Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Influencing Factors ◽  
Visible Light Irradiation ◽  
Intermediate Product ◽  
Degradation Mechanism ◽  
Light Irradiation ◽  
Transformation Pathways

A H2O2-modified titanate nanomaterial was synthesized to improve catalytic activity. The influencing factors, intermediate product transformation pathways and degradation mechanism of the photodegradation process of NPX by the HTNM were studied.

Pd/Ag and Pd/Au bimetallic nanocatalysts on mesoporous silica for plasmon-mediated enhanced catalytic activity under visible light irradiation

2016 ◽  
Vol 4 (26) ◽  
pp. 10142-10150 ◽  
Author(s):  
Priyanka Verma ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Systematic Comparison ◽  
Bimetallic Nanostructures ◽  
Bimetallic Nanocatalysts ◽  
Catalytic Performances

A systematic comparison of plasmonic properties and catalytic performances has been performed with Pd deposited bimetallic nanostructures of plasmonic Ag and Au.

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