scholarly journals Photo-Ni-Dual-Catalytic C(sp2)–C(sp3) Cross-Coupling Reactions with Mesoporous Graphitic Carbon Nitride as a Heterogeneous Organic Semiconductor Photocatalyst

ACS Catalysis ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 3526-3532 ◽  
Author(s):  
Jagadish Khamrai ◽  
Indrajit Ghosh ◽  
Aleksandr Savateev ◽  
Markus Antonietti ◽  
Burkhard König
Keyword(s):  
Organic Semiconductor ◽  
Carbon Nitride ◽  
Cross Coupling ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Semiconductor Photocatalyst

scholarly journals Photocatalytic (Hetero)Arylation of C(sp3)–H Bonds with Carbon Nitride

2020 ◽  
Author(s):  
Saikat Das ◽  
Kathiravan Murugesan ◽  
GONZALO JAVIER VILLEGAS RODRIGUEZ ◽  
Jaspreet Kaur ◽  
Joshua Barham ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Carbon Nitride ◽  
Hydrogen Atom Transfer ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Nickel Catalysis ◽  
Direct Functionalization ◽  
Low Toxicity ◽  
Homogeneous Photocatalysis ◽  
Carbon Nitride Materials

Polymeric graphitic carbon nitride materials have attracted significant interest in recent years and found applications in diverse light-to-energy conversions such as artificial photosynthesis, CO<sub>2 </sub>reduction or degradation of organic pollutants. However, their utilization in synthetic photocatalysis especially in the direct functionalization of C(sp<sup>3</sup>)−H bonds remains underexplored. Herein, we report mesoporous graphitic carbon nitride (mpg-CN) as a heterogeneous organic semiconductor photocatalyst for direct arylation of sp<sup>3</sup> C−H bonds <i>via </i>a combination of<i> </i>hydrogen atom transfer and nickel catalysis. Our protocol has a broad synthetic scope (>70 examples including late-stage modification of densely functionalized bio-active molecules), is operationally simple, and shows high chemo- and regioselectivity. Facile separation and recycling of the mpg-CN catalyst in combination with its low preparation cost, innate photochemical stability and low toxicity are beneficial features overcoming typical shortcomings of homogeneous photocatalysis. Additionally, mechanistic investigations indicate that an unprecedented energy transfer process (EnT) from the organic semiconductor to the nickel complex is operating.

Covalent Functionalization of Carbon Nitride Frameworks through Cross-Coupling Reactions

2018 ◽  
Vol 24 (56) ◽  
pp. 14921-14927 ◽  
Author(s):  
Jingwen Sun ◽  
Ravindra Phatake ◽  
Adi Azoulay ◽  
Guiming Peng ◽  
Chenhui Han ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Covalent Functionalization ◽  
Cross Coupling Reactions

An efficient mesoporous carbon nitride (g-C3N4) functionalized Pd catalyst for carbon–carbon bond formation reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49376-49386 ◽  
Author(s):  
S. Elavarasan ◽  
B. Baskar ◽  
C. Senthil ◽  
Piyali Bhanja ◽  
A. Bhaumik ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Nitride ◽  
Bond Formation ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Carbon Carbon Bond ◽  
Mesoporous Carbon Nitride ◽  
Efficient Heterogeneous Catalyst

Pd-nanoparticles on mesoporous nitrogen-rich carbon nitride (MCN) serves as an efficient heterogeneous catalyst for Sonogashira cross-coupling reactions.

Graphitic carbon nitride based new advanced materials for photocatalytic applications

2019 ◽  
Vol 16 ◽  
Author(s):  
Pankaj Raizada ◽  
Abhinandan Kumar ◽  
Pardeep Singh
Keyword(s):  
Environmental Remediation ◽  
Large Scale ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Pollutant Degradation ◽  
Visible Absorption ◽  
Metal Free ◽  
Photocatalytic Applications ◽  
Semiconductor Photocatalyst

Background: The Present Scenario Of Rapid Industrial And Population Growth Has Become A Serious Threat To Environmental And Energy Concerns. Extremely Noxious Pollutants Like Dyes, Heavy Metal Ions, Phenols, Antibiotics And Pesticides In Water Are The Reason Behind Deprived Water Quality Leading To Inadequate Access To Clean Water. Photocatalysis Is A Prominent Strategy For Environmental Remediation As Photocatalytic Materials Not Only Convert Solar Energy Into Usable Energy Expedient But Also Shows Potential Application In Pollutant Mitigation. An Effectual Photocatalytic System Must Possess Wide Visible Absorption Range, High Physio-Chemical Firmness, And Effective Space-Charge Separation Along With Strong Redox Ability. Polymeric Graphitic Carbon Nitride A Metal-Free Semiconductor Photocatalyst Has Outshined As A Robust Photocatalyst For Various Photocatalytic Applications. Method: Hybridizing Polymeric G-C3n4 With Other Semiconductor Photocatalysts Has Not Only Conquer The Limitations Related To Pristine G-C3n4 But Also Displayed Improved Photoactivity. Different Photocatalytic Systems Involving G-C3n4 Coupled Metal-Oxides, Metal-Free Systems And Complex Heterojunction Systems Are Reviewed. Moreover, An All-Embracing Study Based On G-C3n4 Based Nanocatalysts Is Explored Via Heterojunction Formation Taking G-C3n4 As One Component. Results: Photocatalytic Experiments Involving Photodegradation Of Pollutants, Revealed The Significance Of Metal-Free G-C3n4 In The Heterojunction System Which Remarkably Boost The Photoactivity Through Effective Separation And Migration Of Photocarriers. Moreover, From Recyclability Experiments, Exceptional Photostability Of G-C3n4 Based Photocatalysts Was Observed. Photocatalytic Pollutant Degradation Is A Complex Phenomenon Which Requires Significant Experimental Techniques To Support The Mechanism. With The Help Of Photoelectrochemical Analysis, The Mechanisms Behind Photodegradation Can Be Evaluated And Explored. Conclusion: Metal-Free Polymeric G-C3n4 Is A Potential Semiconductor Photocatalyst Which Can Be Optimally Utilized For Wastewater Treatment. Coupling G-C3n4 With Another Semiconductor Material With An Appropriate Band Edge Can Effectively Enhance The Photocatalytic Efficacy. Herein, G-C3n4 Derived Metal-Oxide, Metal-Free And Complex Heterojunction Systems Are Explored And Their Photocatalytic Efficiency Is Evaluated For Pollutant Degradation. However, More Effective Research Efforts Are Needed For Large-Scale Applications Of G-C3n4 Based Photocatalysts.

Photocatalytic splitting of water on s-triazine based graphitic carbon nitride: an ab initio investigation

2015 ◽  
Vol 3 (45) ◽  
pp. 23011-23016 ◽  
Author(s):  
K. Srinivasu ◽  
Swapan K. Ghosh
Keyword(s):  
Ab Initio ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Water Splitting ◽  
Semiconductor Photocatalyst

Ab initio investigations have been carried out to understand the mechanism of photocatalytic water splitting on a g-CN based semiconductor photocatalyst.

A facile synthesis of mesoporous graphitic carbon nitride supported palladium nanoparticles as highly effective and reusable catalysts for Stille coupling reactions under mild conditions

2020 ◽  
Vol 44 (17) ◽  
pp. 6714-6723
Author(s):  
Erbay Kalay ◽  
Sultan Cetin ◽  
Safacan Kolemen ◽  
Önder Metin
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Coupling Reactions ◽  
Stille Coupling ◽  
Facile Synthesis ◽  
One Pot ◽  
Mild Conditions ◽  
Supported Palladium ◽  
Supported Pd

This paper reports a facile one-pot synthesis of mesoporous graphitic carbon nitride (mpg-CN) supported Pd NPs, denoted as mpg-CN/Pd, as highly efficient catalysts for Stille C–C coupling reactions under mild conditions.

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