Photocurable Hypervalent Fluorinated Sulfur Containing Thin Films with Remarkable Hardness and Modulus DOI Creative Commons

Kelly A. Bonetti,

Deniz Rende, Michael Murphy

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(18), P. 4413 - 4413

Published: Sept. 17, 2024

Novel tetrafluoro-λ6-sulfanyl-containing oligomers prepared by visible light-promoted addition of 1,4-(bis-chlorotetrafluoro-λ6-sulfanyl) benzene or 1,3-(bis-chlorotetrafluoro-λ6-sulfanyl) to either 1,4-diethynyl the 1,3-diethynyl isomers form hard, stress resistant thin films on spin casting. The isomeric were utilized establish a structure-function relationship for mechanical properties from oligomers. Young’s moduli 145-nm-thick cured could reach 60 GPa. measured hardnesses, between 1.57 and 2.77 GPa, more than double those polymethyl methacrylate (PMMA) films. Curing polymer UV irradiation resulted in coatings that exhibited remarkable hardness modulus with good surface adhesion silicon.

Language: Английский

Carbazole-fused coumarin based oxime esters (OXEs): efficient photoinitiators for sunlight driven free radical photopolymerization DOI
Yijun Zhang, Zheng Liu, Timur Borjigin

et al.

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(17), P. 6881 - 6891

Published: Jan. 1, 2023

The use of sunlight to initiate free radical polymerization under air is a key challenge.

Language: Английский

Citations

24

Recent advances on core-extended thioxanthones as efficient photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2024, Volume and Issue: 206, P. 112794 - 112794

Published: Jan. 26, 2024

Language: Английский

Citations

12

Recent advances on diaryliodonium-based monocomponent photoinitiating systems DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 195, P. 112193 - 112193

Published: June 3, 2023

Language: Английский

Citations

18

Recent advances on Anthraquinone-based photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 191, P. 112039 - 112039

Published: March 29, 2023

Language: Английский

Citations

17

Naphthoquinone-Based Oxime Esters for Free Radical Photopolymerization under Sunlight or a Blue Light-Emitting Diode DOI
Yijun Zhang, Bin Song,

Céline Dietlin

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(9), P. 3962 - 3974

Published: Feb. 22, 2024

Free radical polymerization initiated under visible light or sunlight remains one of the major challenges in photopolymer chemistry area. Because low intensity modern sources (light-emitting diodes, LEDs) and mismatch their absorption spectra with that irradiation sources, commercial usual photoinitiators often exhibit poor efficiency blue sunlight. In this work, eight naphtho[2,3-d]thiazole-4,9-dione benzaldehyde-based oxime esters were developed as type I multicomponent photoinitiating systems good properties region, especially at 405 450 nm. Compared to benchmark photoinitiator (diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, TPO), some our initiators furnished similar better photoinitiation performance than reference upon exposure LED@405 TPO, most newly proposed used could furnish on par system nm LED@450 Among interesting results study, final acrylate function conversions be obtained during free trimethylolpropane triacrylate within 1 h by using solar when combined iodonium salt aromatic amine.

Language: Английский

Citations

6

Ultrafast Sunlight‐Induced Polymerization: Unveiling 2‐Phenylnaphtho[2,3‐d]Thiazole‐4,9‐dione as a Unique Scaffold for High‐Speed and Precision 3D Printing DOI Creative Commons
Ji Feng, Yijun Zhang,

Fabrice Morlet‐Savary

et al.

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: March 19, 2024

Abstract A series of 15 dyes based on the 2‐phenylnaphtho[2,3‐ d ]thiazole‐4,9‐dione scaffold and 1 compound 2,3‐diphenyl‐1,2,3,4‐tetrahydrobenzo[ g ]quinoxaline‐5,10‐dione are studied as photoinitiators. These compounds used in two‐ three‐component high‐performance photoinitiating systems for free radical polymerization trimethylolpropane triacrylate (TMPTA) polyethylene glycol diacrylate (PEGDA) under sunlight. Remarkably, conversion TMPTA can reach ≈60% within 20 s, while PEGDA attains a 96% 90 s. To delve into intricate chemical mechanisms governing polymerization, an array analytical techniques is employed. Specifically, UV–vis absorption fluorescence spectroscopy, steady‐state photolysis, stability experiments, quenching cyclic voltammetry, electron spin resonance trapping (ESR‐ST) collectively contribute to comprehensive understanding photochemical mechanisms. Photoinitiation capacities these determined using real‐time Fourier transformed infrared spectroscopy (RT‐FTIR). Of particular interest revelation that, owing superior initiation ability dyes, high‐resolution 3D patterns be manufactured by direct laser write (DLW) technology printing. This underscores efficient processes newly developed both artificial natural light sources, presenting avenue energy‐saving, environmentally friendly conditions.

Language: Английский

Citations

6

High Photoinitiating Efficiency of Benzothioxanthene‐Based Oxime Esters in Photopolymerization via Photocleavage and/or Single Electron Transfer under Visible Light and Sunlight DOI Creative Commons
Yijun Zhang, Bin Song, Zheng Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(35)

Published: June 15, 2024

In this work, six benzothioxanthene-based oxime esters were employed as photoinitiators for photopolymerization under visible light (LED) and sunlight. Their abilities to behave Type I by mean of a photocleavage mechanism but also in multicomponent photoinitiating systems with an iodonium salt (through electron transfer mechanism) both explored the different structures. Due their broad absorption spectra tailing up 600 nm, properties systematically tested excitation low-intensity LED at wavelengths 405 nm 450 nm. Additionally, parallel polymerization tests done artificial light, investigated solar displayed high reactivity France (Western Europe) even winter conditions. For best candidates i.e. most reactive structures, direct laser write experiments carried out, evidencing interest these

Language: Английский

Citations

5

Recent advances on phenothiazine-based oxime esters as visible light photoinitiators of polymerization DOI Creative Commons
Frédéric Dumur

European Polymer Journal, Journal Year: 2023, Volume and Issue: 202, P. 112597 - 112597

Published: Nov. 18, 2023

Language: Английский

Citations

10

High Photoinitiating Efficiency of Benzothioxanthene‐based Oxime Esters in Photopolymerization via Photocleavage and/or Single Electron Transfer under Visible Light and Sunlight DOI Creative Commons
Yijun Zhang, Bin Song, Zheng Liu

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(35)

Published: June 15, 2024

Abstract In this work, six benzothioxanthene‐based oxime esters were employed as photoinitiators for photopolymerization under visible light (LED) and sunlight. Their abilities to behave Type I by mean of a photocleavage mechanism but also in multicomponent photoinitiating systems with an iodonium salt (through electron transfer mechanism) both explored the different structures. Due their broad absorption spectra tailing up 600 nm, properties systematically tested excitation low‐intensity LED at wavelengths 405 nm 450 nm. Additionally, parallel polymerization tests done artificial light, investigated solar displayed high reactivity France (Western Europe) even winter conditions. For best candidates i.e. most reactive structures, direct laser write experiments carried out, evidencing interest these

Language: Английский

Citations

4

Pyrrolidone based one-component photoinitiator for improving the storage stability of photocurable materials to sunlight via two beams of light excitation DOI
Jingfang Li,

Qiusen Ding,

Kewei Cao

et al.

European Polymer Journal, Journal Year: 2023, Volume and Issue: 196, P. 112291 - 112291

Published: July 11, 2023

Language: Английский

Citations

9