Double benzylidene ketones as photoinitiators for visible light photopolymerization

N‐(9‐Oxo‐9H‐thioxanthen‐2‐yl) acrylamide as a Versatile Photoinitiator for Photopolymerization

“…These changes can be ascribed to the phenomenon of photobleaching. Above results demonstrate that TXAM has excellent photobleaching ability, which is favorable for deep curing of the materials [44,45] …”

“…Above results demonstrate that TXAM has excellent photobleaching ability, which is favorable for deep curing of the materials. [44,45] Photopolymerization Free Radical Polymerization in HDDA and TMPTA TXAM was investigated as one-component photoinitiator for FRP of HDDA and TMPTA upon LEDs @385, 405 and 435 nm in laminate. The photopolymerization profiles were presented in Figure 6.…”

Recent advances on benzylidene ketones as photoinitiators of polymerization

“…[105,265] This year, four double benzylidene ketones were proposed by Wang and coworkers as visible light photoinitiators of polymerization, namely TPA-H, CZ-H, TPA-C and CZ-C (See Figure 32). [204] Compared to TPAK and CZK that respectively absorb at 440 and 410 nm, synthesis of double benzylidene ketones did not significantly modify their absorptions compared to their mono-benzylidene ketone counterparts since absorption maxima peaking at 448 and 400 nm could be respectively determined for TPA-C and CZ-C (See Table 9). Conversely, due to the presence of stronger electron-donating groups in TPA-C and CZ-C, absorptions of TPA-C and CZ-C are redshifted of 38 and 20 nm compared to that of TPA-H and CZ-H. Jointly, an enhancement of the molar extinction coefficients was observed for TPA-C and CZ-C, consistent with an elongation of the π-conjugated system compared to TPA-H and CZ-H. Based on their absorptions, all dyes are suitable for irradiation done at 460 and 532 nm.…”

“…Figure 33. UV-visible absorption spectra of the four double benzylidene ketones in dichloromethane.Reproduced with permission of Ref [204]. …”

Recent advances on benzylidene cyclopentanones as visible light photoinitiators of polymerization

“…Among these families of dyes, dithienophospholes, [46,47] zinc complexes, [48] diketopyrrolopyrroles, [49][50][51] iridium complexes, [52][53][54][55][56][57][58][59] metal organic framework (MOFs), [60][61][62] helicenes, [63,64] benzylidene ketones, [65,66] phenothiazines, [67][68][69][70][71][72][73][74][75][76][77] camphorquinones, [78,79] curcumin, [80][81][82][83] push-pull dyes, [6,7,[84][85][86][87][88][89][90][91][92]...…”