Self-assembly of luminescent platinum-salen Schiff-base complexes

Xingqiang Lü, Wai Yeung WONG, Rick W K WONG*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

25 Citations (Scopus)


Treatment of K2PtCl4 with the MeO-salen Schiff base H2L [H2L = N,N′-bis(3-methoxysalicylidene)ethylene- 1,2-diamine] gave the precursor complex PtL, which, upon recrystallization from two different solvent mixtures, afforded different solvate forms of PtL·H2O (1) and PtL·DMF (2) with different solid-state colors. The self-assembly of the PtL precursor with K2Pt(CN) 4 or K2Pd(CN)4 leads to the isolation of isostructural compound [K2(PtL)2Pt(CN)4] ·1.5H2O (3) or [K2(PtL)2Pd(CN) 4]·1.5H2O (4), respectively. The solid-state structures of 1-4 were established by X-ray crystallography. It is interesting that the helix of the PtL units, along with the other two homochiral helical arrangements of K+ and M2+ (M = Pt or Pd) ions, can generate a unique "fake" example of a triple-stranded helix in a 1-D helical polymeric chain. Two such triple-stranded helical chains intertwining one another can give rise to a double-stranded helix formed by intermolecular weak C-H⋯N hydrogen-bonding interactions with a long helical pitch of ca. 56 Å. The optical absorption and photoluminescence properties of 1-4 were also examined.

Original languageEnglish
Pages (from-to)523-528
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number4
Publication statusPublished - Feb 2008

Scopus Subject Areas

  • Inorganic Chemistry

User-Defined Keywords

  • Photoluminescence
  • Platinum
  • Schiff bases
  • Self assembly


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