Malaysian Journal of Analytical Sciences Vol 19 No 1 (2015): 236 – 243

 

 

 

SYNTHESIS AND CHARACTERIZATION OF COPPER(II) CARBOXYLATE WITH PALM-BASED OLEIC ACID BY ELECTROCHEMICAL TECHNIQUE

 

(Sintesis dan Pencirian Kuprum (II) Karboksilat dengan Asid Oleik Berasaskan Sawit Menggunakan Teknik Elektrokimia)

 

Norazzizi Nordin, Wan Zurina Samad, Muhammad Rahimi Yusop, Mohamed Rozali Othman*

 

School of Chemical Sciences and Food Technology,

Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

 

*Corresponding author: rozali@ukm.edu.my

 

 

Abstract

Cu(II) oleate (Cu(II)Ol) complexes were synthesized using an electrochemical technique in the presence of palm-based oleic acid as the ligand and Cu ions from the released of anode material through the electrochemical oxidation of Cu foil. The system consisted of Cu foil and a graphite rod as the anode and cathode, respectively, while ammonium acetate (CH₃COONH₄) was used as a supporting electrolyte. The optimal parameters to synthesis of Cu(II) oleate complexes from 0.1 M oleic acid are using 10 V of applied voltage in the presence of 0.5 M CH₃COONH₄ for 2 hours of electrolysis time at room temperature (~27 °C). The results from spectroscopic studies using FTIR, XPS and UV-Vis confirms the existence of bonding between the coordinated carboxylate group of oleic acid with Cu(II) ions. This proved that the desired Cu(II) oleate complexes were successfully synthesized using electrochemical techniques. The surface morphology of the complex was analyzed using FESEM, and the micrograph obtained showed that the synthesized complexes formed thread-like structures.

 

Keywords: copper complexes; oleic acid, electrochemical synthesis

 

Abstrak

Kompleks Cu(II) oleat telah disintesis menggunakan teknik elektrokimia dalam kehadiran asid oleik berasaskan sawit sebagai ligan dan ion Cu daripada pelepasan bahan anod melalui pengoksidaan elektrokimia kepingan Cu. Sistem sintesis elektrokimia terdiri daripada kepingan Cu dan rod grafit masing-masing bertindak sebagai anod dan katod manakala larutan ammonium asetat (CH₃COONH₄) digunakan sebagai elektrolit penyokong. Parameter optimum untuk sintesis kompleks Cu(II) oleat daripada 0.1 M asid oleik adalah dengan menggunakan keupayaan 10 V dalam kehadiran 0.5 M CH₃COONH₄ selama 2 jam masa sintesis pada suhu bilik (~27 °C). Keputusan yang diperolehi daripada kajian spektroskopi menggunakan FTIR, UV-Nampak dan XPS mengesahkan kewujudan ikatan antara kumpulan karboksilat pada asid oleik dengan ion Cu(II). Ini membuktikan bahawa kompleks Cu(II) oleat yang diingini telah berjaya disintesis menggunakan teknik elektrokimia. Morfologi permukaan kompleks tersebut telah dianalisis menggunakan FESEM dimana mikrograf yang diperolehi menunjukkan kompleks yang disintesis membentuk struktur seakan bebenang.

 

Kata kunci: kompleks kuprum; asid oleik; sintesis elektrokimia

 

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