2020
DOI: 10.1002/pol.20190044
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Flavones as natural photoinitiators for light mediated free‐radical polymerization via light emitting diodes

Abstract: In this work, we propose the use of flavones that can be derived from natural products as versatile high performance visible light photoinitiators initially with amino acid and later with iodonium salt and phosphino benzoic acid combinations for free-radical polymerization acrylates of thin specimen (25 μm) and methacrylates thick specimen (1.4 mm) upon illumination with near ultraviolet light or visible light utilizing light emitting diodes (LED)@385 nm and LED@405 nm. High polymerization initiating capabilit… Show more

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Cited by 33 publications
(28 citation statements)
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“…[8][9] Recently, photopolymerization has known a revival of interest with the development of the 3D/4D printing technologies, and a great deal of efforts has thus been devoted to elaborate dyes strongly absorbing at 405 nm, which is the wavelength currently under use in 3D printers. [10][11][12][13][14][15][16][17][18] With aim at reducing the environmental impact of photopolymerization, greener processes are now widely explored and the use of biosourced photoinitiators and monomers, [19][20][21][22][23][24][25][26][27][28][29] or the use of sunlight as the irradiation source to initiate polymerization processes are now extensively studied. [30][31][32][33][34][35] The progress in these two fields is considerable.…”
Section: Introductionmentioning
confidence: 99%
“…[8][9] Recently, photopolymerization has known a revival of interest with the development of the 3D/4D printing technologies, and a great deal of efforts has thus been devoted to elaborate dyes strongly absorbing at 405 nm, which is the wavelength currently under use in 3D printers. [10][11][12][13][14][15][16][17][18] With aim at reducing the environmental impact of photopolymerization, greener processes are now widely explored and the use of biosourced photoinitiators and monomers, [19][20][21][22][23][24][25][26][27][28][29] or the use of sunlight as the irradiation source to initiate polymerization processes are now extensively studied. [30][31][32][33][34][35] The progress in these two fields is considerable.…”
Section: Introductionmentioning
confidence: 99%
“…Geometry optimizations were carried out with the Gaussian 03 suite of programs at uB3LYP/6-31G* level. 27 Geometries were frequency checked. The electronic absorption spectra were calculated from the time-dependent density functional theory (TD-DFT) at MPW1PW91/6-31G* level of theory on the relaxed geometries calculated at the uB3LYP/6-31G* level of theory.…”
Section: Computational Proceduresmentioning
confidence: 99%
“…Recently, the development of biosourced or bioinspired photoinitiators has become an active research field. [149][150][151][152][153][154][155][156][157][158] Indeed, natural dyes offer a unique opportunity to design biocompatible polymers. [149,[159][160] These photoinitiators can also be cheap, as these compounds originate from renewable resources.…”
Section: Ferrocene-based Chalconesmentioning
confidence: 99%