Mechanistic Insights into Oxygen Tolerance of Graphitic Carbon Nitride-Mediated Heterogeneous Photoinduced Electron Transfer-Reversible Addition Fragmentation Chain Transfer Polymerization

2021 ◽  
Author(s):  
Erika Paola Fonseca Parra ◽  
Bilel Chouchene ◽  
Jean-Luc Six ◽  
Raphaël Schneider ◽  
Khalid Ferji
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Carbon Nitride ◽  
Chain Transfer ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Oxygen Tolerance ◽  
Reversible Addition ◽  
Chain Transfer Polymerization

SI-PET-RAFT: Surface-Initiated Photoinduced Electron Transfer-Reversible Addition–Fragmentation Chain Transfer Polymerization

2019 ◽  
Vol 8 (4) ◽  
pp. 374-380 ◽  
Author(s):  
Mingxiao Li ◽  
Michele Fromel ◽  
Dhanesh Ranaweera ◽  
Sergio Rocha ◽  
Cyrille Boyer ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Chain Transfer ◽  
Reversible Addition ◽  
Chain Transfer Polymerization

scholarly journals The effect of metallic Fe(ii) and nonmetallic S codoping on the photocatalytic performance of graphitic carbon nitride

RSC Advances ◽  
2018 ◽  
Vol 8 (14) ◽  
pp. 7558-7568 ◽  
Author(s):  
Hailong Dou ◽  
Shaohui Zheng ◽  
Yongping Zhang
Keyword(s):  
Electron Transfer ◽  
Valence Band ◽  
Conduction Band ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Impurity Band ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Fe Impurity

The photoinduced electrons jump more easily to the conduction band of g-C3N4 for the Fe impurity band locates above the valence band acting a bridge for electron transfer.

Organo-photocatalysts for photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization

2015 ◽  
Vol 6 (31) ◽  
pp. 5615-5624 ◽  
Author(s):  
Jiangtao Xu ◽  
Sivaprakash Shanmugam ◽  
Hien T. Duong ◽  
Cyrille Boyer
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Photoinduced Electron Transfer ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Reversible Addition ◽  
Methacrylate Monomers

In this work, we demonstrate the use of organophotoredox catalysts under visible light to perform photoinduced electron transfer-reversible addition fragmentation chain transfer (PET-RAFT) for the polymerization of methacrylate monomers.

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.

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