Synthesis, characterization and spectroscopic studies of cyclometalated platinum(II) complexes containing meta-bis(2-pyridoxy)benzene

Brenda Ka Wen Chiu, Michael Hon Wah Lam*, Derek Yiu Kin Lee, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

A series of mononuclear and binuclear cyclometalated platinum(II) complexes containing new terdentate meta -bis(2-pyridoxy)benzene ligands: 3,5-bis(2-pyridoxy)toluene (L1H) and 3,5-bis(2-pyridoxy)-2-dodecylbenzene (L2H): [Pt(L1)Cl] (1), [Pt(L2)Cl] (2), [Pt(L1) (CH3CN)](ClO4) (3), {[Pt(L1)] 2(μ-dppm)}(ClO4)2 (4), {[Pt(L2)]2(μ-dppm)} (ClO4)2 (5), {[Pt(L1)]2 (μ-pyrazole)}(ClO4) (6), {[Pt(L2)]2 (μ-pyrazole)}(ClO4) (7), {[Pt(L1)]2 (μ-imidazole)}(ClO4) (8) and {[Pt(L2)]2(μ-imidazole)} (ClO4) (9), have been synthesized and characterized. These ligands are coordinated to platinum(II) in a "pincer"-like manner and the presence of pyridyl donors enhances the availability of the ligand π* orbitals for electronic transition. Spectroscopic properties of these cyclometalated complexes were studied. While the non-coplanar nature of the ligands hinders ligand-ligand and metal-metal interactions in these cyclometalated complexes, the presence of long hydrocarbon side chain on ligand L2H seems to alleviate such hindrance. Intermolecular, and possibly Pt-Pt interactions were observed in complex 2 at high concentration.

Original languageEnglish
Pages (from-to)2888-2899
Number of pages12
JournalJournal of Organometallic Chemistry
Volume689
Issue number18
DOIs
Publication statusPublished - 15 Sep 2004

Scopus Subject Areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

User-Defined Keywords

  • Cyclometalated complexes
  • meta-Bis(2-pyridoxy)benzene
  • Pincer ligands
  • Platinum(II) complexes
  • Pt Pt interactions

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