scholarly journals Effect of different ligands on the controlled polymerization of monodisperse polystyrene nanospheres by atom transfer radical polymerization in an aqueous emulsion

2012 ◽  
Vol 6 (10) ◽  
pp. 837-846 ◽  
Author(s):  
B. Y. Tian ◽  
P. J. Hu ◽  
M. Yuan ◽  
E. J. Tang ◽  
S. J. Liu ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Aqueous Emulsion ◽  
Polystyrene Nanospheres ◽  
Monodisperse Polystyrene

scholarly journals Metal-free atom transfer radical polymerization with ppm catalyst loading under sunlight

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Ma ◽  
Jinshuai Song ◽  
Xun Zhang ◽  
Yu Jiang ◽  
Li Ji ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst Design ◽  
Polymer Materials ◽  
Catalyst Loading ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Heteroatom Doping ◽  
Metal Free ◽  
Highly Effective

AbstractOrganocatalytic atom transfer radical polymerization (O-ATRP) is recently emerging as an appealing method for the synthesis of metal-free polymer materials with well-defined microstructures and architectures. However, the development of highly effective catalysts that can be employed at a practical low loading are still a challenging task. Herein, we introduce a catalyst design logic based on heteroatom-doping of polycyclic arenes, which leads to the discovery of oxygen-doped anthanthrene (ODA) as highly effective organic photoredox catalysts for O-ATRP. In comparison with known organocatalysts, ODAs feature strong visible-light absorption together with high molar extinction coefficient (ε455nm up to 23,950 M–1 cm–1), which allow for the establishment of a controlled polymerization under sunlight at low ppm levels of catalyst loading.

scholarly journals Fully oxygen-tolerant atom transfer radical polymerization triggered by sodium pyruvate

2020 ◽  
Vol 11 (33) ◽  
pp. 8809-8816 ◽  
Author(s):  
Grzegorz Szczepaniak ◽  
Matylda Łagodzińska ◽  
Sajjad Dadashi-Silab ◽  
Adam Gorczyński ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Organic Solvents ◽  
Ambient Atmosphere ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Sodium Pyruvate

A novel photoinduced ATRP system enabling a well-controlled polymerization in both aqueous and organic solvents in an ambient atmosphere.

scholarly journals Iron Catalysts in Atom Transfer Radical Polymerization

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1648 ◽  
Author(s):  
Sajjad Dadashi-Silab ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
High Efficiency ◽  
Catalyst Design ◽  
Iron Catalysts ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Catalytic Systems ◽  
Functional Monomers ◽  
Styrene Atrp

Catalysts are essential for mediating a controlled polymerization in atom transfer radical polymerization (ATRP). Copper-based catalysts are widely explored in ATRP and are highly efficient, leading to well-controlled polymerization of a variety of functional monomers. In addition to copper, iron-based complexes offer new opportunities in ATRP catalysis to develop environmentally friendly, less toxic, inexpensive, and abundant catalytic systems. Despite the high efficiency of iron catalysts in controlling polymerization of various monomers including methacrylates and styrene, ATRP of acrylate-based monomers by iron catalysts still remains a challenge. In this paper, we review the fundamentals and recent advances of iron-catalyzed ATRP focusing on development of ligands, catalyst design, and techniques used for iron catalysis in ATRP.

scholarly journals Metal-free atom transfer radical polymerization: reaching ppm catalyst loading under sunlight

2020 ◽  
Author(s):  
Qiang Ma ◽  
Jinshuai Song ◽  
Xun Zhang ◽  
Yu Jiang ◽  
Li Ji ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst Design ◽  
Polymer Materials ◽  
Catalyst Loading ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Heteroatom Doping ◽  
Metal Free ◽  
New Class

Abstract Organocatalytic atom transfer radical polymerization (O-ATRP) is recently emerging as an appealing method for the synthesis of metal-free polymer materials with well-defined microstructures and architectures. However, the development of highly effective catalysts that can be employed at a practical low loading are still a challenging task. Herein, we introduce a catalyst design logic based on heteroatom-doping of polycyclic arenes, which led to the discovery of oxygen-doped antratherene (ODA) as a new class of organic photoredox catalysts for O-ATRP. In comparison with known organocatalysts, ODAs feature strong visible-light absorption together with high molar extinction coefficient (ε455nm up to 23950 M–1cm–1), which allow for the establishment of a controlled polymerization under sunlight at low ppm levels of catalyst loading.

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