NEUTRAL SOLITON FORMATION AND DISORDER IN PERNIGRANILINE BASE

被引：20

作者：

COPLIN, KA

JASTY, S

LONG, SM

MANOHAR, SK

SUN, Y

MACDIARMID, AG

EPSTEIN, AJ

机构：

[1] OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210

[2] UNIV PENN,DEPT CHEM,PHILADELPHIA,PA 19104

[3] OHIO STATE UNIV,DEPT CHEM,COLUMBUS,OH 43210

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.72.3206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new long-lived photoinduced absorption near 1.8 eV is reported for pernigraniline base, the Peierls degenerate ground state form of polyaniline. The absence of associated infrared active vibrational modes and the results of light-induced ESR experiments identify the photoexcited defects as disorder confined neutral soliton pairs with a temperature dependent antiferromagnetic exchange interaction. The optical transitions across the Peierls gap are suggested to be broadened by static and quantum fluctuations. The results are in very good agreement with recent predictions of Su and Epstein and McKenzie and Wilkins.

引用

收藏

页码：3206 / 3209

页数：4

相关论文

共 30 条

[1] LARGE-AMPLITUDE QUANTUM FLUCTUATIONS AND SUBGAP OPTICAL-ABSORPTION IN TRANSPOLYACETYLENE [J].

AUERBACH, A ;

KIVELSON, S .

PHYSICAL REVIEW B, 1986, 33 (12) :8171-8179

[2] INFLUENCE OF LIBRONIC DEGREES OF FREEDOM ON ELECTRONIC-PROPERTIES OF POLYANILINE [J].

BARANOWSKI, D ;

BUTTNER, H ;

VOIT, J .

PHYSICAL REVIEW B, 1992, 45 (19) :10990-11003

[3] INFLUENCE OF RING-TORSION DIMERIZATION ON THE BAND-GAP OF AROMATIC CONJUGATED POLYMERS [J].

BREDAS, JL ;

QUATTROCCHI, C ;

LIBERT, J ;

MACDIARMID, AG ;

GINDER, JM ;

EPSTEIN, AJ .

PHYSICAL REVIEW B, 1991, 44 (12) :6002-6010

[4] MICROWAVE MAGNETIC-ENVELOPE DARK SOLITONS IN YTTRIUM-IRON-GARNET THIN-FILMS [J].

CHEN, M ;

TSANKOV, MA ;

NASH, JM ;

PATTON, CE .

PHYSICAL REVIEW LETTERS, 1993, 70 (11) :1707-1710

[5]

Dodd R., 1982, SOLITON NONLINEAR WA

[6] RING-ROTATIONAL DIMERIZATION IN PERNIGRANILINE - REPLY [J].

DOSSANTOS, MC ;

BREDAS, JL .

PHYSICAL REVIEW LETTERS, 1990, 64 (10) :1185-1185

[7] NONLINEAR EXCITATIONS IN PERNIGRANILINE, THE OXIDIZED FORM OF POLYANILINE [J].

DOSSANTOS, MC ;

BREDAS, JL .

PHYSICAL REVIEW LETTERS, 1989, 62 (21) :2499-2502

[8] DYNAMICAL TEST OF DAVYDOV-TYPE SOLITONS IN ACETANILIDE USING A PICOSECOND FREE-ELECTRON LASER [J].

FANN, W ;

ROTHBERG, L ;

ROBERSON, M ;

BENSON, S ;

MADEY, J ;

ETEMAD, S ;

AUSTIN, R .

PHYSICAL REVIEW LETTERS, 1990, 64 (05) :607-610

[9] RING-ROTATIONAL DIMERIZATION IN PERNIGRANILINE [J].

GINDER, JM ;

EPSTEIN, AJ .

PHYSICAL REVIEW LETTERS, 1990, 64 (10) :1184-1184

[10] ROLE OF RING TORSION ANGLE IN POLYANILINE - ELECTRONIC-STRUCTURE AND DEFECT STATES [J].

GINDER, JM ;

EPSTEIN, AJ .

PHYSICAL REVIEW B, 1990, 41 (15) :10674-10685