Luminescence properties of Schiff base-europium(III) mononuclear complexes with a tertiary or quaternary ammonium counter cation in solid state

Miyagai, Natsuki*; Tsuchimoto, Masanobu*; Watanabe, Masayuki   ; Nakajima, Kiyohiko*

Mono-nuclear Eu(III) complexes coordinated by two tetradentate salen type Schiff bases allowed to constitute a meridional eight-coordination structure and demonstrate red luminescence based on a f-f transition by means of ultra-violet irradiation. In this study, ternary and quaternary ammonium cations (XNH or XN) were used for synthesis of mono-nuclear complexes and their luminescence properties were investigated. Especially, the changes of the luminescence intensity with regard to the grind samples were also studied in detail.