Structural Effects in the Indanedione Skeleton for the Design of Low Intensity 300–500 nm Light Sensitive Initiators.

Abstract

-Fluoroallenoate Synthesis via N-Heterocyclic Carbene-Catalyzed Fluorination Reaction of Alkynals. -The first catalytic synthesis of fluoroallenoates, versatile synthetic intermediates toward useful fluorine-containing building blocks, is described.-(WANG, X.; WU, Z.; WANG*, J.; Org. Lett. 18 (2016) 3, 576-579,

Visible light sensitive photoinitiating systems: Recent progress in cationic and radical photopolymerization reactions under soft conditions

“…Similar results were obtained with ID2 that contains a 9-octyl-9H-fluorene moiety, resulting in a high extinction coefficient (ε 448nm = 42,200 M −1 cm −1 ) and high monomer (EPOX and TMPTA) conversions (see Table 9) [186]. These systems are much more efficient than the well-known CQ based PISs.…”

“…Radical and cationic photopolymerization [193] Please cite this article in press as: Xiao of the charge delocalization in the axis of the chromophore) [185,186]. Compound D 1 consisting in an indanedione moiety linked to an aniline moiety through a C C double bond exhibits high molar extinction coefficient (ε 478nm ∼ 38,000 M −1 cm −1 ), whereas the absorption of indanedione and aniline alone only arises in the UV light range [185].…”

“…The CCRP of EPOX/TMPTA blends or TEP of Trithiol/DVE-3 blends may be initiated using ID2 based PISs at 457 nm or even under the lower intensity of a household blue LED bulb (see in Ref. [186]). 4.3.1.6.…”

Photochemical Production of Interpenetrating Polymer Networks; Simultaneous Initiation of Radical and Cationic Polymerization Reactions

“…The final coatings are tack-free. Such useful PIs in these novel dual photoinitiating systems are derived from dye structures and include e.g., diketopyrrolopyrrole-thiophene derivatives [107], mono and polyfunctional thiophene derivatives [108], indanedione skeleton [109], naphthalene scaffold [110], naphthalimide and naphthalic anhydride derivatives [111], anthraquinone derivatives [112], chalcone derivatives [113], push-pull malonate and malonitrile based compounds [114], naphthalimide based methacrylated derivatives [115], α-silicon polyoxomolybdate [116], acridinediones [117], difunctional acridinediones [118], Keggin-type polyoxometalate ion [119], push-pull structured indandiones [120], dimethyldihydropyrene [121], chromone based compounds [122], perylene bis-dicarboximides [123], pyrene derivatives [124], zinc complexes [125], pyridinium salts [126], pyrromethenes [127], trifunctional triazines [128], cyclometallated Pt(II) complexes [129], polyaromatic structures [130], and phenanthroline ligand containing Ru complex [131].…”

“…For example, various low viscosity blends of e.g., TMPTA/EPOX, TMPTA/DVE, TMSH/DVE can be polymerized under exposure to low intensity lights (intensity < 8 mW/cm ) emitted by household devices such as a halogen lamp [117,118,125,126,129], a fluorescent bulb (peaks at 430, 550 nm) [131], a blue led at 462 nm [109,132] and even sunlight (intensity ~2 mW/cm −2 ). Three representative examples are the following.…”