| abstract |
The present invention provides a phenanthroimidazole derivative and a preparation method and application thereof. The phenanthroimidazole derivative of the present invention has the structural formula shown in formula (I), and R is an electron donor group; In the present invention, a phenanthreneimidazole group containing trifluoromethyl phenyl is used as an electron acceptor, and a series of D-π-A structures of phenanthrene containing a light-absorbing photosensitive group are synthesized by means of the properties of a specific electron-donor group R. The imidazole derivatives can be used as photoinitiators in the field of UV curing system or 3D printing technology. The phenanthroimidazole derivative of the present invention has a certain length of conjugated chain, which can increase its photon absorption cross section, and as a photoinitiator of an ultraviolet light curing system, it can initiate a polymerization reaction at a wavelength of 365 nm, and has a high polymerization efficiency within 50s. The double bond conversion rate of phenanthroimidazole derivatives is as high as 88.34%. |