EurasianSciEnTech2018, Ankara, Türkiye, 22 - 23 Kasım 2018, ss.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
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.