Title :
Optical properties of a 2,6-dihydroxyanthraquinone single crystal
Author :
Namsrai, Nasanbat ; Yamasaki, Michael ; Yoshinari, Tomoki ; Nagasaka, Shogo ; Itoh, Hayato ; Kuriyama, Yasuhiko ; Sakamoto, Makoto
Author_Institution :
Sch. of Mater.´s Sci., Mongolian Univ. of Sci. & Technol., Ulaanbaatar, Mongolia
fDate :
June 28 2013-July 1 2013
Abstract :
A study has been made on the polarization dependence and the temperature dependence of absorption and luminescence spectra of a 2,6-dihydroxyanthraquinone single crystal. The single crystal structure has been investigated by X-ray diffraction and is assigned as monoclinic and the space group P21/c (#14). Electronic energy levels were calculated by molecular orbital calculation program of WinMOPAC. The absorption band at 3.2eV and the luminescence band at 2.2eV are assigned mainly to the transition between HOMO and LUMO states. The anisotropic effect on the absorption and luminescence was analyzed in view of the crystal structure. The polarization dependence is consistently explained by the direction of transition dipole moment of 2,6-dihydroxyanthraquinone molecule.
Keywords :
X-ray diffraction; crystal structure; orbital calculations; organic compounds; photoluminescence; space groups; ultraviolet spectra; visible spectra; 2,6-dihydroxyanthraquinone single crystal; LUMO states; X-ray diffraction; absorption band; absorption spectra; anisotropic effect; crystal structure; electronic energy levels; luminescence band; luminescence spectra; molecular orbital calculation; optical properties; polarization; space group; tate; temperature dependence; transition dipole moment; Absorption; Educational institutions; Extraterrestrial measurements; Optical diffraction; Optical polarization; Optical reflection; Temperature measurement;
Conference_Titel :
Strategic Technology (IFOST), 2013 8th International Forum on
Conference_Location :
Ulaanbaatar
Print_ISBN :
978-1-4799-0931-5
DOI :
10.1109/IFOST.2013.6616968
