The study of electrical and magnetic properties of LiPF6 doped polyaniline

J. Joo; H. G. Song; C. K. Jeong; J. S. Baeck; J. K. Lee; K. S. Ryu

doi:10.1016/S0379-6779(98)00193-3

The study of electrical and magnetic properties of LiPF₆ doped polyaniline

J. Joo, H. G. Song, C. K. Jeong, J. S. Baeck, J. K. Lee, K. S. Ryu

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The results of temperature dependent dc conductivity, EPR magnetic susceptibility, and X-ray photoelectron spectroscopy experiments (XPS) are reported for polyaniline (PAN) doped with lithium hexafluorophosphate (LiPF₆), PAN-LiPF₆. DC conductivity (σ_dc) and its temperature dependence of PAN-LiPF₆ samples vary with the average molecular weight (Mw) of polyaniline used and the composition of doping solution. The EPR linewidth and Pauli susceptibility (X^P) depend on the Mw of PAN used. The σ_dc and the X^P of the intermediate Mw PAN-LiPF₆ samples are higher than those of the low Mw PAN samples, indicating more highly conducting state of the intermediate Mw PAN samples. Based on the results of XPS and EPR experiments, some portions of quinoid rings in emeraldine base form of PAN are transformed into benzenoid rings through LiPF₆ doping process, indicating the formation of polarons. However, the existence of some portions of quinoid rings in PAN-LiPF₆ samples after doping suggests an inhomogeneous doping or a pseudo doping.

Original language	English
Pages (from-to)	215-220
Number of pages	6
Journal	Synthetic Metals
Volume	98
Issue number	3
DOIs	https://doi.org/10.1016/S0379-6779(98)00193-3
Publication status	Published - 1999 Jan 1

Keywords

Electrical and magnetic properties
LiPF
Polyaniline

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(98)00193-3

Cite this

@article{0a69952132f0499a8250148a47a1e5f3,

title = "The study of electrical and magnetic properties of LiPF6 doped polyaniline",

abstract = "The results of temperature dependent dc conductivity, EPR magnetic susceptibility, and X-ray photoelectron spectroscopy experiments (XPS) are reported for polyaniline (PAN) doped with lithium hexafluorophosphate (LiPF6), PAN-LiPF6. DC conductivity (σdc) and its temperature dependence of PAN-LiPF6 samples vary with the average molecular weight (Mw) of polyaniline used and the composition of doping solution. The EPR linewidth and Pauli susceptibility (XP) depend on the Mw of PAN used. The σdc and the XP of the intermediate Mw PAN-LiPF6 samples are higher than those of the low Mw PAN samples, indicating more highly conducting state of the intermediate Mw PAN samples. Based on the results of XPS and EPR experiments, some portions of quinoid rings in emeraldine base form of PAN are transformed into benzenoid rings through LiPF6 doping process, indicating the formation of polarons. However, the existence of some portions of quinoid rings in PAN-LiPF6 samples after doping suggests an inhomogeneous doping or a pseudo doping.",

keywords = "Electrical and magnetic properties, LiPF, Polyaniline",

author = "J. Joo and Song, {H. G.} and Jeong, {C. K.} and Baeck, {J. S.} and Lee, {J. K.} and Ryu, {K. S.}",

note = "Funding Information: This work was supported in part by Basic Science Research Grant (BSRI-97-2444) of the Ministry of Education, Korea, Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134), and the CRM-KOSEF (1998).",

year = "1999",

month = jan,

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doi = "10.1016/S0379-6779(98)00193-3",

language = "English",

volume = "98",

pages = "215--220",

journal = "Synthetic Metals",

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TY - JOUR

T1 - The study of electrical and magnetic properties of LiPF6 doped polyaniline

AU - Joo, J.

AU - Song, H. G.

AU - Jeong, C. K.

AU - Baeck, J. S.

AU - Lee, J. K.

AU - Ryu, K. S.

N1 - Funding Information: This work was supported in part by Basic Science Research Grant (BSRI-97-2444) of the Ministry of Education, Korea, Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134), and the CRM-KOSEF (1998).

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The results of temperature dependent dc conductivity, EPR magnetic susceptibility, and X-ray photoelectron spectroscopy experiments (XPS) are reported for polyaniline (PAN) doped with lithium hexafluorophosphate (LiPF6), PAN-LiPF6. DC conductivity (σdc) and its temperature dependence of PAN-LiPF6 samples vary with the average molecular weight (Mw) of polyaniline used and the composition of doping solution. The EPR linewidth and Pauli susceptibility (XP) depend on the Mw of PAN used. The σdc and the XP of the intermediate Mw PAN-LiPF6 samples are higher than those of the low Mw PAN samples, indicating more highly conducting state of the intermediate Mw PAN samples. Based on the results of XPS and EPR experiments, some portions of quinoid rings in emeraldine base form of PAN are transformed into benzenoid rings through LiPF6 doping process, indicating the formation of polarons. However, the existence of some portions of quinoid rings in PAN-LiPF6 samples after doping suggests an inhomogeneous doping or a pseudo doping.

AB - The results of temperature dependent dc conductivity, EPR magnetic susceptibility, and X-ray photoelectron spectroscopy experiments (XPS) are reported for polyaniline (PAN) doped with lithium hexafluorophosphate (LiPF6), PAN-LiPF6. DC conductivity (σdc) and its temperature dependence of PAN-LiPF6 samples vary with the average molecular weight (Mw) of polyaniline used and the composition of doping solution. The EPR linewidth and Pauli susceptibility (XP) depend on the Mw of PAN used. The σdc and the XP of the intermediate Mw PAN-LiPF6 samples are higher than those of the low Mw PAN samples, indicating more highly conducting state of the intermediate Mw PAN samples. Based on the results of XPS and EPR experiments, some portions of quinoid rings in emeraldine base form of PAN are transformed into benzenoid rings through LiPF6 doping process, indicating the formation of polarons. However, the existence of some portions of quinoid rings in PAN-LiPF6 samples after doping suggests an inhomogeneous doping or a pseudo doping.

KW - Electrical and magnetic properties

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