ИСТИНА

The development of scientific knowledge has opened a new class of nanostructured organosilicon luminophore, which typically demonstrate efficient Förster resonance energy transfer (FRET)1. These materials have found application as the functional basis for plastic scintillators, organic light-emitting diode (OLED) and fluorescent labels in medicine and molecular biology. This work compares similar nanostructured luminophores with silicon and carbon branching centers2. They consist of 4 identical donor and 1 acceptor moieties. As the donors alkyl derivatives of p-terphenyl (EH-3P) and 2,5-diphenyloxazole (PPO) were used. All synthesized compounds have the same acceptor – POPOP. The work discusses a method for the preparation of previously unstudied carbon branching center, which is a key precursor in the chosen synthesis route. It is shown that of the two possible ways only one led to desirable result. The subsequent steps are based on the direct cross-coupling reaction and the preparation of precursors for coupling using the Van Leusen reaction. The structure of the compounds was confirmed using by 1Н NMR spectroscopic data, the purity of the new luminophores was determined using gel permeation chromatography. Optical properties in dilute THF solution for all compounds are also discussed. This work was supported by a grant of the President for a leading scientific school NSh-3843.2022.1.3.