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Miyagai, Natsuki*; Tsuchimoto, Masanobu*; Watanabe, Masayuki; Nakajima, Kiyohiko*
no journal, ,
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 (X
NH or X
N) 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.
Murayama, Tatsuya*; Watanabe, Masayuki; Fujisawa, Kiyoshi*
no journal, ,
In this presentation, N,N,N',N'-Tetrakis(2-pyridylmethyl)ethylenediamine(TPEN) and the derivative, N,N,N',N'-Tetrakis(2-pyridylmethyl)-1,2-propanediamine(MeTPEN) which methylene chain was substituted by methyl group were used as ligand to synthesize europium complexes and which molecular structures and properties were compared by using spectroscopic methods.
Murayama, Tatsuya*; Watanabe, Masayuki; Aoyagi, Noboru; Fujisawa, Kiyoshi*
no journal, ,
In this study, we synthesized Eu(III) complex using N,N,N',N'-tetrakis(2-pyridylmethyl)-ethylenediamine (TPEN) and TPEN derivatives, N,N,N',N'-tetrakis(2-pyridylmethyl)-propylenediamine(MeTPEN) which has methyl group into the ethylenediamine framework, the structure and physical properties of these complexes investigated. The crystal structure of Eu(TPEN) and Eu(MeTPEN), the geometry of these structures indicate pseudo-bicapped square antiprism (10 coordination) with two bidentate NO
; ions. As the result of investigation of fluorescence spectrum and lifetime in organic solution, the fluorescence of Eu (MeTPEN) was enhanced more intensity than that of Eu(TPEN) by addition of OAc; ion.