Novel D-π-A and A-π-D-π-A three-component photoinitiating systems based on carbazole/triphenylamino based chalcones and application in 3D and 4D printing
A series of carbazole or triphenylamine based mono-chalcones, displaying either D-π-A or A-π-D-π-A architecture, have been designed and synthesized for intense absorption bands at around 405 nm with high molar extinction coefficients around 105 M−1 cm−1 corresponding to π-π* electronic transitions. Photosensitivity of the new photoinitiating systems composed of a chalcone and an iodonium salt (Iod) was investigated by UV-visible absorption and fluorescence spectroscopies, and their...[Show more]
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