Abstract
Phototransformations of acrylamide derivatives of the piperazino-substituted polyfluorochalcones (APPFC) were studied by UV, IR, Raman, and NMR spectroscopy. It has been shown that two types of photochemical reactions occur in the films of APPFC: free-radical polymerization of acrylic fragments and cyclodimerization of the carbon-carbon double bond in a chalcone. It was shown that in polyfluorochalcones PFCh-1, PFCh-2, trans-cis isomerization of chalcone occurs with the subsequent formation of dimers. Along with this, a competitive reaction of intramolecular photocyclization occurs in PFCh-2 via the dehydrofluorination. Based on MALDI-TOF mass spectra, the structural formulas of the possible dimeric and oligomeric fragments of polyfluorochalcones formed in the films were proposed. The obtained spectral data indicate that, according to the efficiency of the formation of photocrosslinked films, studied polyfluorochalcones can be arranged in the following order: TAFCh >> PFCh-1 > > PFCh-2.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
