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Volume 4, Issue 4 (Suppl) J Laser Opt Photonics, an open access journal
ISSN: 2469-410X Optics 2017
November 15-17, 2017
November 15-17, 2017 | Las Vegas, USA
8th International Conference and Exhibition on
Lasers, Optics & Photonics
Synthesis and characterization of organic mechanoluminescent materials
Kenji Murakami
Shizuoka University, Japan
Mechanoluminescence (ML) is a phenomenon where light emission is induced by a mechanical action on a solid. The ML is
classified into fracto-, plastico- and elastico-MLs according to an excitation mode of the electrons. When the material structure
is fractured then the electrons are excited to the higher energy levels followed by the relaxation process of electrons to lower energy
levels. The energy difference is released as a light. This kind of luminescence is observed as a result of the plate force during and
just earlier to earthquake. The ML was also detected by a peeling of the tape in a vacuum. We have synthesized the europium
doped dibenzoylmethide triethylammonium as an organic mechanoluminescent material. The synthesis was completed at a very low
temperature of 70°C by a controlled slow cooling method. The synthesized material showed a very strong mechanoluminescence
at 612 nm in the visible region. In this study, the ML material has been synthesized with an addition of 1-ethenylpyrrolidin-2-one
[(polyvinylpyrrolidone) (PVP)]. We have investigated effects of the ligands, EuI2, EuBr2 and EuCl2 on the ML substance structure,
molecular orbital electron distributions of the ligands and the ML and the photoluminescence. The ML material structure was
characterized by using the nuclear magnetic resonance spectroscopy (NMR), X-ray photoelectron spectroscopy (XPS), X-ray
diffraction (XRD) and Gaussian DFT/B3LYP/6-31G (d,p) software. The ML properties were observed by using the multichannel
spectroscope.
Biography
Kenji Murakami has completed his PhD in the year 1983 from Osaka University, Japan. He is working as a Professor in the Department of Engineering, Graduaate School
of Integrated Science and Technology, Shizuoka University. He has published seven book chapters, more than 100 papers in reputed journals and has been serving as a
Referee of reputed journals.
Kenji Murakami, J Laser Opt Photonics 2017, 4:4 (Suppl)
DOI: 10.4172/2469-410X-C1-017