EPR of mesoscale polyanilines

被引:15
作者
Brenneman, KR [1 ]
Feng, J
Zhou, Y
MacDiarmid, AG
Kahol, PK
Epstein, AJ
机构
[1] Ohio State Univ, Chem Phys Program, Columbus, OH 43210 USA
[2] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA
[3] Wichita State Univ, Dept Phys, Wichita, KS 67260 USA
[4] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[5] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA
基金
美国国家科学基金会;
关键词
polyaniline and derivatives; electron spin resonance; solution processing;
D O I
10.1016/S0379-6779(98)00781-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Electron paramagnetic resonance studies of the undoped and d,l-camphorsulfonic acid-doped tetra-, octa-, and hexadecamer of aniline are reported. Undoped oligomers have similar to 1 spin per 1000 2-ring repeats, increasing with oligomer length, that are suggested to originate from self-doping mechanisms. Doped oligomers have a temperature-independent Pauli susceptibility of similar to 40 x 10(-6) emu/mole 2-ring repeats, showing the importance of three-dimensional delocalization. There is also a localized spin density of similar to 1 spin per twenty-five 2-ring repeats, and nearly Lorentzian lineshapes. Doped samples have 6 to 300 K FWHM linewidths decreasing from 10 to 4, 6 to 3.5, and 5 to 1.5 Gauss in the tetra-, octa-, and hexadecamer, respectively, implying increasing delocalization.
引用
收藏
页码:785 / 786
页数:2
相关论文
共 9 条
[1]   LiCl induced morphological changes in polyaniline base and their effect on the electronic properties of the doped form [J].
Angelopoulos, M ;
Liao, YH ;
Furman, B ;
Graham, T .
MACROMOLECULES, 1996, 29 (08) :3046-3049
[2]  
FENG J, 1997, SPE ANTEC TECH PAPER, V43, P1373
[3]   INSULATOR-TO-METAL TRANSITION IN POLYANILINE [J].
GINDER, JM ;
RICHTER, AF ;
MACDIARMID, AG ;
EPSTEIN, AJ .
SOLID STATE COMMUNICATIONS, 1987, 63 (02) :97-101
[4]   EXCHANGE-COUPLED PAIR MODEL FOR THE NON-CURIE-LIKE SUSCEPTIBILITY IN CONDUCTING POLYMERS [J].
KAHOL, PK ;
MEHRING, M .
SYNTHETIC METALS, 1986, 16 (02) :257-264
[5]   Limits for metallic conductivity in conducting polymers [J].
Kohlman, RS ;
Zibold, A ;
Tanner, DB ;
Ihas, GG ;
Ishiguro, T ;
Min, YG ;
MacDiarmid, AG ;
Epstein, AJ .
PHYSICAL REVIEW LETTERS, 1997, 78 (20) :3915-3918
[6]   Aggregation and interchain ''self'' doping in emeraldine base [J].
Long, SM ;
Brenneman, KR ;
Saprigin, A ;
Kohlman, RS ;
Epstein, AJ ;
Angelopoulos, M ;
Buchwalter, SL ;
Rossi, A ;
Zheng, W ;
MacDiarmid, AG .
SYNTHETIC METALS, 1997, 84 (1-3) :809-810
[7]   PARAMAGNETIC-SUSCEPTIBILITY OF HIGHLY CONDUCTING POLYANILINE - DISORDERED METAL WITH WEAK ELECTRON-ELECTRON INTERACTIONS (FERMI GLASS) [J].
SARICIFTCI, NS ;
HEEGER, AJ ;
CAO, Y .
PHYSICAL REVIEW B, 1994, 49 (09) :5988-5992
[8]   MAGNETIC-SUSCEPTIBILITY STUDIES OF TETRATHIOFULVALENE-TETRACYANOQUINDIMETHAN (TTF) (TCNQ) AND RELATED ORGANIC METALS [J].
SCOTT, JC ;
GARITO, AF ;
HEEGER, AJ .
PHYSICAL REVIEW B, 1974, 10 (08) :3131-3139
[9]   3 DIMENSIONALITY OF METALLIC STATES IN CONDUCTING POLYMERS - POLYANILINE [J].
WANG, ZH ;
LI, C ;
SCHERR, EM ;
MACDIARMID, AG ;
EPSTEIN, AJ .
PHYSICAL REVIEW LETTERS, 1991, 66 (13) :1745-1748