Iodinated Polystyrene for Polymeric Charge Transfer Complexes: Toward High-Performance Near-UV and Visible Light Macrophotoinitiators

2019 ◽  
Vol 52 (9) ◽  
pp. 3448-3453 ◽  
Author(s):  
Alexandre Baralle ◽  
Patxi Garra ◽  
Bernadette Graff ◽  
Fabrice Morlet-Savary ◽  
Céline Dietlin ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
High Performance ◽  
Charge Transfer Complexes

scholarly journals Water-Soluble Visible Light Sensitive Photoinitiating System Based on Charge Transfer Complexes for the 3D Printing of Hydrogels

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3195
Author(s):  
Hong Chen ◽  
Mehdi Vahdati ◽  
Pu Xiao ◽  
Frédéric Dumur ◽  
Jacques Lalevée
Keyword(s):  
Charge Transfer ◽  
3D Printing ◽  
Visible Light ◽  
Water Solubility ◽  
Charge Transfer Complex ◽  
Water Soluble ◽  
Charge Transfer Complexes ◽  
Free Radical Photopolymerization ◽  
Potential Applications ◽  
A Charge

The development of visible-light 3D printing technology by using water-soluble initiating systems has attracted widespread attention due to their potential applications in the manufacture of hydrogels. Besides, at present, the preparation of water-soluble photoinitiators suitable for visible light irradiation (such as LEDs) still remains a challenge. Therefore, this work is devoted to developing water-soluble photoinitiators (PI)/photoinitiating systems (PIS) upon irradiation with a LED @ 405 nm. In detail, a new water-slightly-soluble chalcone derivative dye [(E)-3-(4-(dimethylamino) phenyl)-1-(4-(2-(2-(2-methoxyethoxy) ethoxy) ethoxy) phenyl) prop-2-en-1-one] was synthesized here and used as a PI with a water-soluble coinitiator, i.e., triethanolamine (TEA) which was also used as an electron donor. When combined together, a charge transfer complex (CTC) formed immediately which exhibited excellent initiating ability for the free radical photopolymerization of poly(ethyleneglycol)diacrylate (PEG-DA). In light of the powerful CTC effect, the [dye-TEA] CTC could not only exhibit enhanced water solubility and mechanical properties but could also be effectively applied for 3D printing. This CTC system is environmentally friendly and cost-saving which demonstrates a great potential to prepare hydrogels via photopolymerization.

A high performance cobalt-doped ZnO visible light photocatalyst and its photogenerated charge transfer properties

Nano Research ◽  
2011 ◽  
Vol 4 (11) ◽  
pp. 1144-1152 ◽  
Author(s):  
Yongchun Lu ◽  
Yanhong Lin ◽  
Dejun Wang ◽  
Lingling Wang ◽  
Tengfeng Xie ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
High Performance ◽  
Visible Light Photocatalyst ◽  
Doped Zno ◽  
Transfer Properties

Nitrogen(II) Oxide Charge Transfer Complexes on TiO2: A New Source for Visible-Light Activity

2015 ◽  
Vol 119 (9) ◽  
pp. 4488-4501 ◽  
Author(s):  
J. Freitag ◽  
A. Domínguez ◽  
T. A. Niehaus ◽  
A. Hülsewig ◽  
R. Dillert ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Charge Transfer Complexes ◽  
Oxide Charge ◽  
Light Activity

scholarly journals Radical Perfluoroalkylation Enabled by a Catalytically Generated Halogen Bonding Complex and Visible Light Irradiation

2021 ◽  
Author(s):  
Tarannum Tasnim ◽  
Calvin Ryan ◽  
Miranda Christensen ◽  
Christopher Fennell ◽  
Spencer Pitre
Keyword(s):  
Charge Transfer ◽  
Complex Formation ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Redox Reactions ◽  
Charge Transfer Complex ◽  
Halogen Bonding ◽  
Charge Transfer Complexes ◽  
Computational Studies ◽  
The Many

Despite the many recent advances in exploiting stoichiometric charge-transfer complexes in visible light promoted single-electron redox reactions, catalytic approaches to charge-transfer complex formation remain limited. This report describes the radical perfluoroalkylation of electron-rich (hetero)arenes and iodoperfluoroalkylation of alkenes and alkynes promoted by a substituted hydroquinone catalyst. Mechanistic and computational studies indicate that the reaction is initiated by the formation of a visible light absorbing halogen bonding complex between the hydroquinone catalyst and the perfluoroalkyl iodide radical precursor.

Visible light photoinitiating systems by charge transfer complexes: Photochemistry without dyes

2020 ◽  
Vol 107 ◽  
pp. 101277 ◽  
Author(s):  
Patxi Garra ◽  
Jean Pierre Fouassier ◽  
Sami Lakhdar ◽  
Yusuf Yagci ◽  
Jacques Lalevée
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Charge Transfer Complexes
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