Enhanced Singlet Oxygen Generation in Oxidized Graphitic Carbon Nitride for Organic Synthesis

2016 ◽  
Vol 28 (32) ◽  
pp. 6940-6945 ◽  
Author(s):  
Hui Wang ◽  
Shenlong Jiang ◽  
Shichuan Chen ◽  
Dandan Li ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Organic Synthesis ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation

scholarly journals Surface-Doped Graphitic Carbon Nitride Catalyzed Photooxidation of Olefins and Dienes: Chemical Evidence for Electron Transfer and Singlet Oxygen Mechanisms

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 639 ◽  
Author(s):  
Apostolos Chatzoudis ◽  
Vasileios Giannopoulos ◽  
Frank Hollmann ◽  
Ioulia Smonou
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Carbon Nitride ◽  
Solvent Polarity ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Electron Transfer Mechanism ◽  
Heterogeneous Nature ◽  
Chemical Evidence

A new photocatalytic reactivity of carbon-nanodot-doped graphitic carbon nitride (CD-C3N4) with alkenes and dienes, has been disclosed. We have shown that CD-C3N4 photosensitizes the oxidation of unsaturated substrates in a variety of solvents according to two competing mechanisms: the energy transfer via singlet oxygen (1O2) and/or the electron transfer via superoxide (O·−2). The singlet oxygen, derived by the CD-C3N4 photosensitized process, reacts with alkenes to form allylic hydroperoxides (ene products) whereas with dienes, endoperoxides. When the electron transfer mechanism operates, cleavage products are formed, derived from the corresponding dioxetanes. Which of the two mechanisms will prevail depends on solvent polarity and the particular substrate. The photocatalyst remains stable under the photooxidation conditions, unlike the most conventional photosensitizers, while the heterogeneous nature of CD-C3N4 overcomes usual solubility problems.

A bifunctional NiCoP-based core/shell cocatalyst to promote separate photocatalytic hydrogen and oxygen generation over graphitic carbon nitride

2017 ◽  
Vol 5 (36) ◽  
pp. 19025-19035 ◽  
Author(s):  
Zhixiao Qin ◽  
Yubin Chen ◽  
Zhenxiong Huang ◽  
Jinzhan Su ◽  
Liejin Guo
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Core Shell ◽  
Oxygen Generation ◽  
Nickel Cobalt ◽  
Cobalt Phosphate

A bifunctional core/shell cocatalyst with a NiCoP core and a nickel cobalt phosphate (NiCo–Pi) shell is developed to promote photocatalytic hydrogen and oxygen generation over graphitic carbon nitride.

Atomically dispersed cobalt on graphitic carbon nitride as robust catalyst for selective oxidation of ethylbenzene by peroxymonosulfate

2021 ◽  
Author(s):  
Jiaquan Li ◽  
Shiyong Zhao ◽  
Shi-ze Yang ◽  
Shaobin Wang ◽  
Hongqi Sun ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Organic Synthesis ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Efficient Strategy ◽  
Highly Efficient ◽  
Challenging Tasks ◽  
Oxidation Of Ethylbenzene ◽  
Novel Catalyst

The development of highly efficient strategy for the activation C-H bond in hydrocarbons for organic synthesis is one of the most challenging tasks facing the chemical industries. Novel catalyst with...

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