TY - JOUR
T1 - Synthesis, Spectroscopic Studies, Crystal Structure and Electrochemical Properties of New Cobalt(III) Complex Derived from 2-Aminophenol and 4-(Dimethylamino)Cinnamaldehyde
T2 - Nano-Sized Complex Thin Film Formation via Surface Layer-by-Layer Chemical Deposition Method
AU - Habibi, Mohammad Hossein
AU - Shojaee, Elahe
AU - Yamane, Yuki
AU - Suzuki, Takayoshi
N1 - Funding Information:
Acknowledgment The authors wish to thank the University of Isfahan for financially supporting this work.
PY - 2012/1
Y1 - 2012/1
N2 - 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.
AB - 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.
KW - Cobalt(III)
KW - Crystal structure
KW - Electrochemical study
KW - Mononuclear complexes
KW - NO donor
KW - Nano-sized complex
KW - Surface modification
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U2 - 10.1007/s10904-011-9535-1
DO - 10.1007/s10904-011-9535-1
M3 - Article
AN - SCOPUS:84856213067
SN - 1574-1443
VL - 22
SP - 190
EP - 195
JO - Journal of Inorganic and Organometallic Polymers and Materials
JF - Journal of Inorganic and Organometallic Polymers and Materials
IS - 1
ER -