Emerging waste-free non-destructive system based on molecular sensors originating from novel europium complexes for in-situ determination of polymer coating thickness

Herein, novel europium(III) complex derivatives dedicated to polymer chemistry applications as molecular sensors have been reported. The following are among them tris(4,4,4-trifluoro-1-phenylbutane-1,3-dione)europium(III) (BTA) and tris(4,4,4-trifluoro-1-(2-naphthyl)butane-1,3-dione)europium(III)] (NTA). To obtain the relevant europium complexes, they were coordinated with corresponding ligands, e.g., 4-phenyl-2,6-bis(2-pyridyl)pyridine (PPP), 2,2?-bipyridine (Bpy), 2-(2-pyridyl)-1,3-benzothiazole (PBT) 2-(2-pyridyl)imidazo[1,2-a]pyridine (PIP). application of these compounds luminescent monitor kinetics cationic photopolymerisation monomers has investigated along determination optical properties. Ultimately, possibility employing complexes thickness for coatings resulting from free radical trimethylolpropane triacrylate was measured using Fluorescence Probe Technology developing a zero-waste, non-destructive method in-situ coating thickness.