Synthesis, Spectroscopic Studies, Crystal Structure and Electrochemical Properties of New Cobalt(III) Complex Derived from 2-Aminophenol and 4-(Dimethylamino)Cinnamaldehyde: Nano-Sized Complex Thin Film Formation via Surface Layer-by-Layer Chemical Deposition Method

Mohammad Hossein Habibi, Elahe Shojaee, Yuki Yamane, Takayoshi Suzuki

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

New Schiff base (HL) ligand is prepared via condensation of 2-aminophenol and 4-(dimethylamino) cinnamaldehyde. The cobalt complex with the formula of [Co(L) 2(MePy) 2]PF 6 is prepared in good yield from the reaction of the ligand with cobalt(II) acetate. The compounds were characterized by the analytical and spectroscopic methods. The ligand (HL) behaves as a bidentate ligand and coordinates to the cobalt ions via the nitrogen and oxygen atoms with mononuclear structure. The ligand (HL) has been structurally characterized by X-ray crystallography. There is O-H···N-H bond linking the molecules together. FT-IR spectra show that HL is coordinated to the cobalt ion in a mono-negative bidentate manner with ON donor sites of the azomethene N and deprotonated phenolic-OH. There are two methylpyridine molecules apically coordinated to Co(III) ion in octahedral environment. Electrochemical properties were investigated as metal centres in the dimethylformamide solvents. The Co(III) complex exhibit both irreversible reductive (CoIII/CoII; Epc, -1. 24 V) and oxidative (CoII/CoIII; Epa, +0. 79 V, respectively) responses in cyclic voltammetry. Thin film of nano-sized [M(L) 2(MePy) 2]PF 6 complex was formed by surface layer-by-layer chemical deposition method. The formation of uniform thin films of nano-crystalline metal complex is dependent on metal and ligand concentrations.

Original languageEnglish
Pages (from-to)190-195
Number of pages6
JournalJournal of Inorganic and Organometallic Polymers and Materials
Volume22
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

Keywords

  • Cobalt(III)
  • Crystal structure
  • Electrochemical study
  • Mononuclear complexes
  • NO donor
  • Nano-sized complex
  • Surface modification

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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