Infrared Study on Crystal Formation-Growth Process and Crystal Structure of Maleimide from Gaseous Solution System Including Air or Air/MeOH Mixture as Solvent Gas
Yuki Tsurumura
Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, Korimoto 1–21–40, Kagoshima 890–0065, Japan
Toshifumi Yoshidome *
Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, Korimoto 1–21–40, Kagoshima 890–0065, Japan
Janice B. Rabor
Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, Korimoto 1–21–40, Kagoshima 890–0065, Japan
Hidetoshi Miyazaki
Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, Korimoto 1–21–40, Kagoshima 890–0065, Japan
Morihide Higo
Department of Chemistry, Biotechnology and Chemical Engineering, Kagoshima University, Korimoto 1–21–40, Kagoshima 890–0065, Japan
*Author to whom correspondence should be addressed.
Abstract
We investigated crystal formation process and crystal structure on a surface or in a bulk medium in gaseous solution system, using maleimide as solute gas and air or air/MeOH as solvent gas. In the air solvent, some of the gaseous maleimide molecules aggregated to form small crystal in the bulk medium and fell down on a surface without any orientation formation. Maleimide molecules which did not fell down was adsorbed on a surface with the orientation in such a way that the pyrrole ring was parallel to the surface. In the air/MeOH mixture solvent, strong correlation was observed between maleimide and MeOH. The maleimide crystal changed its orientation together with that of MeOH with the passage of time. The C-O axis of MeOH was perpendicular to the surface at the final stage. On vaporization of these MeOH molecules, maleimide crystallization proceeded further to form complete crystal so that the molecular plane
may be parallel to the surface.
Keywords: Infrared, attenuated total reflection, maleimide, crystal growth, orientation