Electrochemical Study on Energy Potential Levels with Pyrene Molecule

Abstract

Pyrene based molecule has been synthesized through the reaction of pyrene-1-carboxaldehyde and 4-phenylthiosemicarbazide in this research. The pyrene based molecule showed specific optical properties such as absorption and emission changes after mixing with fluoride in DMSO. The phenomenon is induced by the interaction of the molecule and fluoride. This interaction may affect to electron distributions and potential energy levels. In this regard, synthesized pyrene based molecule has been investigated for its electron distributions and HOMO/LUMO energy levels depending on interaction with fluoride. The absorption measurement, cyclicvoltammograms and computational method were investigated to calculate and compare energy potential levels.

Particle Size, Morphology and Color Characteristics of C.I. Pigment Red 57:1 : 2. Effect of Salt Milling Process

“…In addition, the developed crystallite size and the possible reduction of inter-planar spacing inside the particle due to salt-milling would provide more ext -ended conjugation and faster charge transfer 37) . This could cause the particle to enhance the light absorption at longer wavelengths with the reduced band gap energy 38,39) , thus resulting in a blue color shift for this smaller-sized (submicron) particle. Therefore, the dependence of the color on particle size of the pigment with salt milling could be a direct consequence of the crystallite size.…”