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2 article(s) from Fouassier, Jean-Pierre

Metal and metal-free photocatalysts: mechanistic approach and application as photoinitiators of photopolymerization

Jacques Lalevée,
Sofia Telitel,
Pu Xiao,
Marc Lepeltier,
Frédéric Dumur,
Fabrice Morlet-Savary,
Didier Gigmes and
Jean-Pierre Fouassier

Beilstein J. Org. Chem. 2014, 10, 863–876, doi:10.3762/bjoc.10.83

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Graphical Abstract

Scheme 1: Examples of photoinitiating systems.

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Figure 1: Previously reported PIC (based on metal complexes) [45-52].

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Figure 2: Previously reported PIC (metal free organic molecules) [54,55].

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Scheme 2: Reaction mechanisms for the three-component system PIC/eA/E-Z.

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Scheme 3: Reaction mechanisms for the two-component system PIC/eA.

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Scheme 4: Reaction mechanisms for the system PIC/eA/add.

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Scheme 5: Reaction mechanisms for the system PIC/eD/B-Y.

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Figure 3: Typical oxidation and reduction agents used through the photoredox catalysis approach in polymeriza...

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Figure 4: Typical monomers that can be polymerized through a photoredox catalysis approach.

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Scheme 6: Reaction mechanisms for the system Ru(bpy)₃²⁺/Ph₂I⁺/R₃SiH.

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Scheme 7: Reaction mechanisms for the Ru(ligand)₃²⁺/Ph₃S⁺/R₃SiH system.

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Scheme 8: Reaction mechanisms for the Ru(ligand)₃²⁺/Ph₂I⁺/NVK system upon visible lights.

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Scheme 9: Reaction mechanisms for the violanthrone/Ph₂I⁺/TTMSS (R₃SiH) system upon red lights.

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Scheme 10: Reaction mechanisms for the Tr-AD/R-Br/MDEA system upon visible lights.

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Scheme 11: The photoredox catalysis for controlled polymerization reactions.

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Scheme 12: Reaction mechanisms for the Ru(ligand)₃²⁺/MDEA/R-Br system upon visible lights.

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Scheme 13: Reaction mechanisms for the Violanthrone/Ru(ligand)₃²⁺/Ph₂I⁺/R₃SiH system upon visible lights.

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Scheme 14: Reaction mechanisms for the MK/amine/triazine system upon visible lights.

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Figure 5: The new proposed PIC (Ir(piq)₂(tmd)).

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Figure 6: UV–visible light absorption spectra for Ir(piq)₂(tmd) (2) and Ir(ppy)₃ (1); solvent: acetonitrile.

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Figure 7: (A) cyclic voltamogramm for Ir(piq)₂(tmd) in acetonitrile; (B) absorption (a) and luminescence (b) ...

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Figure 8: Photolysis of a Ir(piq)₂(tmd)/Ph₂I⁺ solution ([Ph₂I⁺] = 0.023 M, in acetonitrile) upon a halogen la...

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Figure 9: ESR spin-trapping spectra for the irradiation of a Ir(piq)₂(tmd)/Ph₂I⁺ solution in the presence of ...

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Figure 10: (A) Photopolymerization profile of EPOX; photoinitiating system: Ir(piq)₂(tmd)/Ph₂I⁺/NVK (1%/2%/3%)...

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Figure 11: (A) Photopolymerization profile of TMPTA; initiating systems: (1) Ir(piq)₂(tmd)/MDEA (1%/2%) and (2...

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Full Research Paper

Published 15 Apr 2014

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New core-pyrene π structure organophotocatalysts usable as highly efficient photoinitiators

Sofia Telitel,
Frédéric Dumur,
Thomas Faury,
Bernadette Graff,
Mohamad-Ali Tehfe,
Didier Gigmes,
Jean-Pierre Fouassier and
Jacques Lalevée

Beilstein J. Org. Chem. 2013, 9, 877–890, doi:10.3762/bjoc.9.101

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Graphical Abstract

Scheme 1: Typical reactions for photoinitiated cationic polymerization.

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Scheme 2: Examples of previously investigated architectures.

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Scheme 3: Investigated Co_Pys.

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Scheme 4: Other chemical compounds.

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Figure 1: UV–vis absorption spectra of the investigated compounds: (A) In acetonitrile for Py_1 and acetonitr...

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Figure 2: HOMO–LUMO orbitals for Py_2, Py_3, Py_5, Py_6, Py_8, Py_11 and Py_12 involved in the π–π* transitio...

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Figure 3: Fluorescence quenching of ¹Py_3 by the phenacylbromide (PBr) in acetonitrile/toluene (50/50). Inser...

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Scheme 5: Photochemical processes for the different Co_Pys.

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Figure 4: ESR spectra obtained upon irradiation of (A) Py_3/Iod, (B) Py_3/PBr and (C) Py_3/EDB in tert-butylb...

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Figure 5: ESR-spin trapping spectra of Py_9/Iod in tert-butylbenzene (storage at rt for 24 h); (a) experiment...

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Figure 6: Photopolymerization profiles of EPOX upon Xe–Hg lamp irradiation (λ > 340 nm) under air for differe...

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Figure 7: Photopolymerization profiles of EPOX upon a Xe–Hg lamp irradiation (λ > 340 nm) under air for diffe...

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Figure 8: (A) Photopolymerization profiles of EPOX-Si upon a Xe–Hg lamp irradiation (λ > 340 nm) under air fo...

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Figure 9: Photopolymerization profiles of TMPTA upon Xe–Hg lamp irradiation (λ > 340 nm) in laminate for diff...

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Figure 10: Photolysis of (A) the Py_3/PBr couple, (B) the Py_3/Iod couple, and (C) the Py_3/MDEA couple; Xe–Hg...

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Figure 11: Photolysis of (A) the Py_11/Iod and (B) the Py_11/Iod/NVK couple. Halogen lamp irradiation. In acet...

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Scheme 6: The oxidative cycle.

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Scheme 7: Oxidation versus reduction cycles.

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Full Research Paper

Published 07 May 2013

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