Graphitic Carbon Nitride Nanosheet/FeWO4 Nanoparticle Composite for Tandem Photooxidation/Knoevenagel Condensation

2020 ◽  
Vol 3 (7) ◽  
pp. 7057-7065
Author(s):  
Afsaneh Rashidizadeh ◽  
Hamid Reza Esmaili Zand ◽  
Hossein Ghafuri ◽  
Zeynab Rezazadeh
Keyword(s):  
Carbon Nitride ◽  
Knoevenagel Condensation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride

Melamine-derived graphitic carbon nitride as a new effective metal-free catalyst for Knoevenagel condensation of benzaldehyde with ethylcyanoacetate

2018 ◽  
Vol 8 (11) ◽  
pp. 2928-2937 ◽  
Author(s):  
N. D. Shcherban ◽  
P. Mäki-Arvela ◽  
A. Aho ◽  
S. A. Sergiienko ◽  
P. S. Yaremov ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Knoevenagel Condensation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Metal Free

Melamine-derived C3N4 was tested in Knoevenagel condensation of benzaldehyde with ethylcyanoacetate.

Sulfonic acid functionalized graphitic carbon nitride as solid acid–base bifunctional catalyst for Knoevenagel condensation and multicomponent tandem reactions

2021 ◽  
Author(s):  
Priyanka Choudhary ◽  
Arghya Sen ◽  
Ajay Kumar ◽  
Suman Dhingra ◽  
C. M. Nagaraja ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Knoevenagel Condensation ◽  
Low Cost ◽  
Toxic Metal ◽  
Bifunctional Catalyst ◽  
Graphitic Carbon ◽  
Environmentally Benign ◽  
Graphitic Carbon Nitride ◽  
Tandem Reactions ◽  
Acid Base

A highly efficient, non-toxic, metal-free, low-cost, acid–base bifunctional sulfonated graphitic carbon nitride (S-g-C3N4) nanosheets for Knoevenagel condensation and multicomponent tandem reactions under environmentally benign conditions.

scholarly journals Biochar-Based Graphitic Carbon Nitride Adorned with Ionic Liquid Containing Acidic Polymer: A Versatile, Non-Metallic Catalyst for Acid Catalyzed Reaction

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5958
Author(s):  
Samahe Sadjadi ◽  
Fatemeh Koohestani ◽  
Majid Heravi
Keyword(s):  
Ionic Liquid ◽  
Carbon Nitride ◽  
Knoevenagel Condensation ◽  
Biginelli Reaction ◽  
Aqueous Media ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Metallic Catalyst ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

A novel biochar-based graphitic carbon nitride was prepared through calcination of Zinnia grandiflora petals and urea. To provide acidic and ionic-liquid functionalities on the prepared carbon, the resultant biochar-based graphitic carbon nitride was vinyl functionalized and polymerized with 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylic acid and the as-prepared 1-vinyl-3-butylimidazolium chloride. The final catalytic system that benefits from both acidic (–COOH and –SO3H) and ionic-liquid functionalities was applied as a versatile, metal-free catalyst for promoting some model acid catalyzed reactions such as Knoevenagel condensation and Biginelli reaction in aqueous media under a very mild reaction condition. The results confirmed high activity of the catalyst. Broad substrate scope and recyclability and stability of the catalyst were other merits of the developed protocols. Comparative experiments also indicated that both acidic and ionic-liquid functionalities on the catalyst participated in the catalysis.

Metal Doped-C3N4/Fe2O4: Efficient and Versatile Heterogenous Catalysts for Organic Transformations

2019 ◽  
Vol 23 (12) ◽  
pp. 1284-1306
Author(s):  
Vijai K. Rai ◽  
Fooleswar Verma ◽  
Suhasini Mahata ◽  
Smita R. Bhardiya ◽  
Manorama Singh ◽  
...  
Keyword(s):  
Ring Opening ◽  
Carbon Nitride ◽  
Addition Reaction ◽  
High Surface ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Organic Transformations ◽  
Reduction Reactions ◽  
Activation Reaction ◽  
Metal Doped

The polymeric graphitic carbon nitride (g-C3N4) has been one of the interesting earth abundant elements. Though g-C3N4 finds application as a photocatalyst, its photocatalytic behaviour is limited because of low efficiency, mainly due to rapid charge recombination. To overcome this problem, several strategies have been developed including doping of metal/non-metal in the cavity of g-C3N4. Moreover, the CoFe2O4 NPs have been used in many organic transformations because of its high surface area and easy separation due to its magnetic nature. This review describes the role of cobalt ferrite as magnetic nanoparticles and metal-doped carbon nitride as efficient heterogeneous catalysts for new carbon-carbon and carbon-hetero atom bond formation followed by heterocyclization. Reactions which involved new catalysts for selective activation of readily available substrates has been reported herein. Since nanoparticles enhance the reactivity of catalyst due to higher catalytic area, they have been employed in various reactions such as addition reaction, C-H activation reaction, coupling reaction, cyclo-addition reaction, multi-component reaction, ring-opening reaction, oxidation reaction and reduction reactions etc. The driving force for choosing this topic is based-on huge number of good publications including different types of spinels/metal doped-/graphitic carbon nitride reported in the literature and due to interest of synthetic community in recent years. This review certainly will represent the present status in organic transformation and for exploring further their catalytic efficiency to new organic transformations involving C-H activation reaction through coupling, cyclo-addition, multi-component, ring-opening, oxidation and reduction reactions.

Sign in / Sign up

Export Citation Format

Share Document