Solid state dehydration condensation of potassium tetrakis(μ-pyrophosphito-P,P′)diplatinate(II) accompanied by the red shift of the luminescence peak

Tadashi Yamaguchi, Yoichi Sasaki, Takeshi Ikeyama, Tohru Azumi, Tasuku Ito

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Yellow crystals of K4[Pt2(pop)4]·2H2O (pop2- = pyrophosphite(2-)) change their color to orange upon dehydration in vacuo or at elevated temperatures with concomitant change in the emission color from green (emission peak at 515 nm) to orange (emission peaks at 520, 570, 670 nm). Thermogravimetric, 31P CP-MAS NMR, electronic and infrared absorption spectral studies indicate that the dehydration is not a simple loss of crystalline waters but involves dehydration condensation between the neighboring complex anions. The original green emission is recovered on dissolving the orange solid in water. Emissions from the dehydrated orange solid are of phosphorescence type (τem ≤ 6 μs). Relative intensity of the three emission peaks depends significantly on dehydration conditions, exciting wavelength and temperature. The orange solid seems to contain various species with different extent and type of condensation. Red shift of the emission peak on dehydration was discussed on the basis of the ligand field theory.

本文言語English
ページ(範囲)233-239
ページ数7
ジャーナルInorganica Chimica Acta
172
2
DOI
出版ステータスPublished - 1990 6 15
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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