Simultaneous observation of low temperature 4f-4f and 3d-3d emission spectra in a series of Cr(III)(ox)Ln(III) assembly

Md Abdus Subhan, Hiroyasu Nakata, Takayoshi Suzuki, Jong Ha Choi, Sumio Kaizaki

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We report here the low temperature emission spectra in the heterometal dinuclear 3d-4f assembled molecular system [(acac)2CrIII(μ-ox)LnIII(HBpz3) 2] (Cr(ox)Ln:acac- = acetylacetonate, ox2- = oxalate, HBpz3- = hydrotris(pyrazol-1-yl)borate; Ln = La, Nd, Ho, Er, Tm and Yb) in comparison with those of Na[Cr(acac)2(ox)] and [(HBpz3)2Ln(μ-ox)Ln(HBpz3)2](Ln = Nd and Er). From 10 to 150 K the Cr(ox)Ln complexes show a broad emission band around 800 nm from the 2E state of Cr(III) moiety. At room temperature no 2E-4A2 emission was observed in the Cr(ox)Ln except for the La and Lu complexes. On warming from 10 to 300 K rapid quenching of the 2E-4A2 emission of Cr(III) is suggested to result from the energy transfer from Cr to Ln in the Cr(ox)Ln. The excitation spectra and the life-time were also measured with monitoring the 4f-4f emission peaks of the Cr(ox)Yb complex.

Original languageEnglish
Pages (from-to)307-315
Number of pages9
JournalJournal of Luminescence
Volume101
Issue number4
DOIs
Publication statusPublished - Apr 1 2003
Externally publishedYes

Keywords

  • 3d-3d emission
  • 4f-4f emission
  • Chromium(III)
  • Heterometallic complex
  • Lanthanide(III)

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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