An infrared and Raman spectroscopic study of polyanilines co-doped with metal ions and H+

Sun, Tao; Hong, Bo; Ke-rong, Zhu

doi:10.1016/j.saa.2006.08.011

Cited by 92 publications

(42 citation statements)

References 31 publications

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“…The result of TEM in Figure 3 shows that the morphology of PANI-Ni (Figure 3b) is very similar with that of the PANI-Co, both of which are quasi-spherical morphologies. Sun and co-workers thought that Co 2+ ion might bind to more than one nitrogen site in a PANI chain or form inter-chain linkage among several adjacent PANI chains by coordination, and both intra-chain and inter-chain connections might lead to a more coil-like conformational change or a more twisted aggregation of PANI chains [17]. It is deduced that the interaction between Ni 2+ and PANI chains may be favorable to form ferromagnetic domain.…”

Section: Discussionmentioning

confidence: 99%

“…Gosk and his colleagues reported that high-spin Fe 3+ complex could be formed with imine and amine nitrogen in polyaniline [16]. Sun and coworkers presently reported that Co 2+ ion might bind to more than one nitrogen site in a PANI chain or form inter-chain linkage among several adjacent PANI chains by coordination, and both intra-chain and inter-chain connections might lead to a more coil-like conformational change or a more twisted aggregation of PANI chains [17]. This paper will present a new and easy approach that synthesizes both conducting and ferromagnetic polyaniline with trace metal ions at ambient temperature.…”

Section: Introductionmentioning

confidence: 98%

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Synthesis and properties on polyaniline in the presence of nickel chloride

Tan¹,

Zhang²,

Kan³

2009

Express Polym. Lett.

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Abstract. Both Conducting and Ferromagnetic polyaniline containing nickel (abbreviated as PANI-Ni) is synthesized in a solution containing aniline, HCl and NiCl2, using peroxydisulphate as an oxidant and horseradish peroxidase as a catalyst. The conductivity of PANI-Ni is about 10 -1 S cm -1 . The result of electron paramagnetic resonance (EPR) spectra indicated that there were unpaired electrons in PANI-Ni, and the spin density of the PANI-Ni was 1.09·10 19 spins g -1 . The plot of magnetization (M) against the magnetic field (H) indicated that the PANI-Ni was soft ferromagnetic at about 300 K, the saturation magnetization (Ms) and the coercive force (Hc) of which were 4.5 emu g -1 (electromagnetic unit per gram) and about 55 Oe, respectively. UV-Visible (UV-vis) and Fourier Transform Infrared (FTIR) spectra showed that there was strong interaction between Ni 2+ and PANI chains, but the backbone chains of PANI-Ni were hardly changed compared with PANI. Cyclic voltammogram results indicated that the PANI-Ni film was of excellent electrochemical activity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Synthesis and properties on polyaniline in the presence of nickel chloride

Tan¹,

Zhang²,

Kan³

2009

Express Polym. Lett.

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“…These two typical absorption peaks of EB PANI were obtained by other research groups at 1303 cm À1 (assigned to the ÀN-H bending) and 1162 cm À1 (assigned to ÀN¼ vibration), respectively. 30 The peaks at 1303 cm À1 in EB PANI were only slightly shifted to 1301 cm À1 in PANI and 1299 cm À1 in Ru/PANI. On the contrary, band at 1162 cm À1 in EB sharply shifted to 1150 cm À1 in PANI and 1136 cm À1 in Ru/ PANI, which signi¯es that the imine nitrogens of PANI were pseudo-protonated by Ru 3þ .…”

Section: Ft-ir Studiesmentioning

confidence: 97%

Effect of Ruthenium (Iii) Incorporation in Polyaniline Backbone: Materials for Supercapacitive Energy Storage Application

Giri

Ghosh

Das

2013

NANO

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HCl doped polyaniline (PANI) and Ru (III) doped polyaniline (Ru/PANI) have been successfully prepared by in situ oxidative polymerization method and the e®ect of transition metal incorporation in PANI backbone is investigated thoroughly by the execution of Fourier transform infrared spectroscopy (FT-IR) and Raman study. Moreover, to examine the change in surface and bulk morphology of the composites, the¯eld emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) have also been carried out, which revealed the agglomerated state of PANI after being Ru doped. The con¯rmation of the presence of Ru in the composite is achieved by the energy dispersive X-ray spectroscopy (EDS). Also, the electrochemical characterizations namely, cyclic voltammetry (CV), ac impedance spectroscopy (EIS), cyclic chargeÀdischarge (CCD), of the composite was performed by conventional three-electrode system using 1 M H 2 SO 4 electrolyte. On doping with Ru, an increment of speci¯c capacitance of PANI from 160 F/g to 425 F/g has been achieved with a considerable increase in cycle stability.

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“…This leads to better accommodation of volume changes during redox process. [20,21] Electrochemical Impedance Spectroscopy The most widely employed plots for the analysis of EIS data are Nyquist plot and Bode plot. The Nyquist plots of polypyrrole composites at 0 V are shown in Figure 8.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Transition Metal Salt Doping on Polypyrrole/MWCNT Composites for Supercapacitor Applications

Karthikeyan

Das

2012

Macromolecular Symposia

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Summary: Polypyrrole doped by Zn 2þ ions was synthesized as nanocomposites with MWCNT by in-situ oxidative polymerization and investigated as electrode material for supercapacitors. The uniform coating of polypyrrole on MWCNT was characterized by field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). The effect of Zn 2þ ions were characterized by Fourier transform infrared (FTIR) spectroscopy. The electrochemical performances were investigated by cyclic voltammetry (CV), constant current charging/discharging cyclic test (CC) and electrochemical impedance spectroscopy (EIS) using a threeelectrode system. The doped polypyrrole composites show higher specific capacitance and better cyclic stability.

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An infrared and Raman spectroscopic study of polyanilines co-doped with metal ions and H+

Cited by 92 publications

References 31 publications

Synthesis and properties on polyaniline in the presence of nickel chloride

Synthesis and properties on polyaniline in the presence of nickel chloride

Effect of Ruthenium (Iii) Incorporation in Polyaniline Backbone: Materials for Supercapacitive Energy Storage Application

Transition Metal Salt Doping on Polypyrrole/MWCNT Composites for Supercapacitor Applications

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