Recent advances on benzylidene cyclopentanones as visible light photoinitiators of polymerization

Recent advances on photobleachable visible light photoinitiators of polymerization

“…Benzylidene ketone is a versatile scaffold for the design of photobleachable photoinitiators. [189,[232][233][234][235][236][237] Indeed, if excellent photoinitiating abilities were obtained by introducing peripheral triphenylamine or carbazole groups in C61 and C62, introduction of phenothiazine was examined by Qu and coworkers. [238] Indeed, phenothiazine is a wellknown electron donor that was used for the design of numerous photoinitiators due to the easiness of chemical modifications.…”

New long-wavelength D–π-A–π-D chalcone photoinitiator for visible light polymerization with photobleaching and biocompatibility properties

“…[7][8][9][10] Therefore, in recent years, more and more attention has been paid to lower energy and soft visible irradiation sources such as LEDs, which can not only avoid safety problems, but also prevent deformation of materials at lower operating temperatures. [11][12][13][14] At present, the maximum absorption wavelength of free radical initiators on the market, such as photoinitiator 1173 and benzophenone, is below 365 nm, but the wavelength of LED light sources widely used in the industrial field is above 365 nm. Thus, this mismatch between the LED wavelength and the initiator absorption wavelength means that there is low initiation efficiency or that the LEDs cannot be used.…”

“…7–10 Therefore, in recent years, more and more attention has been paid to lower energy and soft visible irradiation sources such as LEDs, which can not only avoid safety problems, but also prevent deformation of materials at lower operating temperatures. 11–14…”

Theoretical Study of Structure and Photophysics of Homologous Series of Bis(arylydene)cycloalkanones

“…Ref. [19] discusses the recent advances on benzylidene cyclopentanones as photosensitizers for two-photon polymerization. The study focuses on the symmetrically substituted benzylidene cyclopentanones and their ability to initiate polymerization.…”