115948-29-3Relevant articles and documents
Photo-crosslinking of a self-assembled coumarin-dipeptide hydrogel
Kim, Se Hye,Sun, Yuan,Kaplan, Jonah A.,Grinstaff, Mark W.,Parquette, Jon R.
, p. 3225 - 3228 (2015)
The self-assembly and photo-crosslinking of a lysine dipeptide functionalized with 7-(diethylamino)-3-coumarin carboxylic acid (7-DAC) is described. Self-assembly of the dipeptide in water and PBS produces a hydrogel comprised of uniform, micrometer length nanofibers. Irradiation of the nanofibers at 365 nm induces dimerization of the coumarin groups, which crosslinks and stabilizes the noncovalent nanofibers and enhances the mechanical properties.
3-carboxylic acid and formyl-derived coumarins as photoinitiators in photo-oxidation or photo-reduction processes for photopolymerization upon visible light: Photocomposite synthesis and 3d printing applications
Dumur, Frédéric,Gigmes, Didier,Graff, Bernadette,Hamieh, Tayssir,Lalevée, Jacques,Noirbent, Guillaume,Rahal, Mahmoud,Toufaily, Joumana
, (2021)
In this paper, nine organic compounds based on the coumarin scaffold and different substituents were synthesized and used as high-performance photoinitiators for free radical pho-topolymerization (FRP) of meth(acrylate) functions under visible light irradiation using LED at 405 nm. In fact, these compounds showed a very high initiation capacity and very good polymerization profiles (both high rate of polymerization (Rp) and final conversion (FC)) using two and three-component photoinitiating systems based on coum/iodonium salt (0.1%/1% w/w) and coum/iodonium salt/amine (0.1%/1%/1% w/w/w), respectively. To demonstrate the efficiency of the initiation of photopolymerization, several techniques were used to study the photophysical and photochemical properties of coumarins, such as: UV-visible absorption spectroscopy, steady-state photolysis, real-time FTIR, and cyclic voltammetry. On the other hand, these compounds were also tested in direct laser write experiments (3D printing). The synthesis of photocomposites based on glass fiber or carbon fiber using an LED conveyor at 385 nm (0.7 W/cm2 ) was also examined.
FeCl3-catalyzed cascade reaction: An efficient approach to functionalized coumarin derivatives
He, Xinwei,Yan, Zhenglei,Hu, Xiaoqian,Zuo, Yin,Jiang, Chang,Jin, Lei,Shang, Yongjia
, p. 1507 - 1514 (2014)
An efficient and environmentally benign synthesis of 3-substituted or 3,4-disubstituted coumarins was accomplished via iron(III) chloride-catalyzed cascade reactions of salicylaldehydes and activated methylene compounds. The reaction preceded cleanly under mild reaction conditions to provide the desired coumarin derivatives in good to excellent yields.
FRET-based rhodamine-coumarin conjugate as a Fe3+ selective ratiometric fluorescent sensor in aqueous media
Qin, Jing-Can,Yang, Zheng-Yin,Wang, Guan-Qun,Li, Chao-Rui
, p. 5024 - 5029 (2015/08/04)
Abstract In this study, a novel ratiometric fluorescent sensor (HL) for Fe3+ based on the conjugation of rhodamine and coumarin has been designed and synthesized. The free sensor displays fluorescence emission at 475 nm, on the addition of Fe3+ to an aqueous solution of HL, the sensor shows significant fluorescence enhancement at 550 nm which should be attributed to an intramolecular fluorescence resonance energy transfer (FRET) mechanism from coumarin to Rhodamine 6G.
