Preparation and Photoluminescence of Europium(III) Complexes with TPPO as Neutral Ligand

3,6-Bis-<i>β</i>-Dicarbonylsubstituted Carbazoles Bearing N-Spacers and Their Eu(III) Complexes as Immunofluorescent Labelling Agents

“…2.9 ± 0.1 and 3d. TOPO is a known synergist of luminescence for europium complexes, as it displaces water from the complexes and thus reduces its fluorescence quenching effect [13]. In a micellar buffer solution, the lifetime of the luminescent state is increased for all the complexes of N-spacer bearing tetraketones 3a-d, but at the same time the luminescent intensity is decreased, which can be due to the presence of the hydrophilic carboxyl-containing spacers that shift the distribution of Eu complexes between the aqueous and the micellar phase in favor of the former.…”

“…1 H,19 F and13 С NMR spectra were recorded on JEOL JNM-ECX400 (400, 2H, carb., J = 8.0 Hz), 8.16 (dd, 2H, carb., J = 8.0 Hz, J = 2.0 Hz), 8.76 (d, 2H, carb., J = 2.0 Hz). Found, %: C 72.53; H 6.42; N 3.71.…”