ИСТИНА

The advancement of scientific knowledge has unveiled a novel category of nanostructured organosilicon luminophores, which commonly exhibit efficient Förster resonance energy transfer (FRET)1 . These materials have been applied as the functional foundation for plastic scintillators, organic light-emitting diodes (OLEDs), and fluorescent labels in medicine and molecular biology. This study compares similar nanostructured luminophores with silicon and carbon branching centers2 . These luminophores comprise of four identical donor moieties and one acceptor moiety. The donors used were alkyl derivatives of p-terphenyl (EH-3P) and 2,5-diphenyloxazole (PPO). All the synthesized compounds share the same acceptor, POPOP. This study discusses a method for the synthesis of a previously unexplored carbon branching center, which serves as a crucial precursor in the chosen synthesis route. It is demonstrated that out of the two possible approaches, only one yields the desired outcome. Subsequent steps involve direct cross-coupling reactions and the preparation of precursors for coupling using the Van Leusen reaction. The structure of the compounds is confirmed using 1H NMR spectroscopic data, and the purity of the new luminophores is determined via gel permeation chromatography. Optical properties of all compounds in dilute THF solution are also discussed. This work was supported by a grant of the President for a leading scientific school NSh-3843.2022.1.3