UV-vis and fluorescence investigation of an acetonaphthone type photoinitiator

Doğruyol S. , Çakmak B. H. , Erdoğmuş A.

EurasianSciEnTech2018, Ankara, Turkey, 22 - 23 November 2018, pp.119

  • Publication Type: Conference Paper / Summary Text
  • City: Ankara
  • Country: Turkey
  • Page Numbers: pp.119


Polymerization reactions are extensively performed in various commercial areas such as coatings, 3D curing, imaging materials, photoresists, halographic recordings and nanoscale micromechanics. The development of the photocuring industry depends on improvement of photoinitiating systems that have the standarts required for industrial fabrication. Photoinitiators produce reactive species like free radicals or ions that are efficient in UVcuring systems. Because of their vital role in photopolymerization, they are the subject of particularly extensive research. Recently, an acetonaphthone based photoinitiator, 2-pyrrolidino acetonaphthone (MPY) was synthesized and characterized by spectral analysis. Solvent effects on the electronic absorption and fluorescence emission spectra of MPY were determined in this study. Molar absorptivity values of MPY in various solvents with different polarities are calculated from absorption spectra. Moreover, singlet energies were obtained by nearly mirrorimage-like relations between the excitation and emission spectra in different solvents. Keywords: Photoinitiator, acetonaphthone, solvent effect, absorption spectra, singlet energy.