Light induced step-growth polymerization of Donor-Acceptor-Donor (DAD) type monomers based on thiophene – [1,2,5] Chalcogenazolo[3,4-f]-benzo [1,2,3] triazole – Thiophene

3D Printing based on Photopolymerization and Photocatalysts: Review and Prospect

“…[ 116 ] utilized DLP printing to generate conductive silver nanoparticles in situ by UV irradiation, in which the PI (free radicals or carbenium ions) could induce photoreduction of silver salt through electron transfer and monomer polymerization according to the monomer type and photopolymerization system. [ 117 ] Nazar et al. [ 118 ] later confirmed that the simultaneous formation of inorganic and organic phases enables the metal nanoparticles to be well distributed in the polymer grid and limits the size of the nanoparticles.…”

Cationic and radical polymerization using a boron–thienothiophene–triphenylamine based D–π–A type photosensitizer under white LED irradiation

“…One of the most important examples are the molecules having donor–π–acceptor (D–π–A) units with pull–push interactions to provide charge generation, mobility and stability for visible light photoinduced polymerization. 14–18…”

“…Various examples available in the literature indicated that conjugated dye molecules can act as photoinitiators and photosensitizers, such as squaraines, diketopyrrolopyrrole, thioxanthone and flavones, 15–20 the chemical structures of which had a drastic impact on the photo-initiating ability of the photopolymerization system. Through dye-sensitized polymerization, the wavelength at which polymerization takes place is adjustable.…”

“…One of the most important examples are the molecules having donor-π-acceptor (D-π-A) units with pull-push interactions to provide charge generation, mobility and stability for visible light photoinduced polymerization. [14][15][16][17][18] Various examples available in the literature indicated that conjugated dye molecules can act as photoinitiators and photosensitizers, such as squaraines, diketopyrrolopyrrole, thioxanthone and flavones, [15][16][17][18][19][20] the chemical structures of which had a drastic impact on the photo-initiating ability of the photopolymerization system. Through dye-sensitized polymerization, the wavelength at which polymerization takes place is adjustable.…”

Recent advances on visible light Thiophene-based photoinitiators of polymerization

“…[209][210][211][212][213] If thiophene can be electrochemically polymerized, photochemical polymerization reactions have also been developed using potassium dichromate as the oxidant, [214] carbon tetrachloride as the electron acceptor, [215] and even in the presence of iodonium salts. [216][217][218][219] Parallel to this, thiophene was not only used as a monomer for electron or photochemical polymerization but also as a building block for the design of photoinitiators of polymerization. Thanks to its facile chemical modification, Type II but also Type I photoinitiators have been prepared with this structure.…”