PHOTOEXCITATION SPECTROSCOPY OF PERNIGRANILINE

被引：23

作者：

LENG, JM ^{[1
]}

GINDER, JM ^{[1
]}

MCCALL, RP ^{[1
]}

YE, HJ ^{[1
]}

EPSTEIN, AJ ^{[1
]}

SUN, Y ^{[1
]}

MANOHAR, SK ^{[1
]}

MACDIARMID, AG ^{[1
]}

机构：

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

来源：

SYNTHETIC METALS | 1991年 / 41卷 / 03期

关键词：

D O I：

10.1016/0379-6779(91)91613-F

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Absorption and photoinduced absorption spectroscopies are reported for pernigraniline base (PNB). Direct absorption of PNB shows the band gap energy at 2.3 eV and pi - pi* transition energies at 3.8 and 4.3 eV. The photoinduced absorption (PA) spectrum at room temperature shows three induced absorption peaks at 1.0 (LE), 1.5 (ME) and 3.0 eV (HE). At a temperature of 10 K, the LE peak becomes two peaks at 1.0 eV (LE1) and 1.3 eV (LE2). The ME peak is very long-lived; in addition, there are very long-lived relatively weak infrared vibrations. Light-induced ESR studies show the long-lived 1.5 eV peak has spin-1/2. We suggest that the LE peak originates from A-B type soliton pairs, while the ME peak originates from massive (approximately 300 m(e)) ring rotational polarons in amorphous regions.

引用

页码：1311 / 1314

页数：4

共 14 条

[1] THEORETICAL-STUDIES ON POLYANILINE [J].