Solvatohromna svojstva novih boja na bazi stilbazolijum-soli

Abstract

Pet novih jedinjenja na bazi stilbazolijum-soli, D-π-A strukture, sintetizovano je i detaljno okarakterisano. Solvatohromizam sintetizovanih jedinjenja ispitan je korišćenjem četiri rastvarača različite prirode pomoću UV-Vis spektroskopije. Takođe, ispitan je uticaj različitih elektron-donorskih grupa na solvatohromna svojstva molekula. Zahvaljujući prirodi kvaternarnog atoma azota, piridinijumov prsten u ovim jedinjenjima ispoljava jak elektron-akceptorski karakter, promovišući intramolekulski transfer naelektrisanja. Zahvaljujući ovom svojstvu, jedinjenja na bazi stilbazolijum-soli su primenu našla u brojnim granama industrije i nauke.

Five novel dyes derived from stilbazolium salts, bearing D-π-A structure, were synthesized and completely characterized. The solvatochromism of the synthesized dyes was investigated using four different solvents by means of UV-Vis spectroscopy. Also, the influence of different electron-donor groups on the solvatochromic properties of dyes was examined. Due to the nature of the quaternary nitrogen atom, the pyridinium ring in these compounds exhibits a strong electron-accepting character, promoting intramolecular charge transfer. This property has enabled compounds derived from stilbazolium salts to find applications in numerous branches of industry and science.