FLUORESCENCE DYNAMICS OF CHARGE-TRANSFER-COMPLEX FILMS OF POLY(N-VINYLCARBAZOLE) AND 1,2,4,5-TETRACYANOBENZENE AND MOLECULAR ASPECTS OF THE DISORDERED STRUCTURE

被引：25

作者：

ITAYA, A

EGAWA, A

UMEHARA, Y

SAKAI, H

MASUHARA, H

机构：

[1] Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Kyoto

来源：

POLYMER | 1994年 / 35卷 / 15期

关键词：

POLY(N-VINYLCARBAZOLE); CHARGE-TRANSFER COMPLEX; FLUORESCENCE DYNAMICS;

D O I：

10.1016/0032-3861(94)90115-5

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Charge-transfer (CT) fluorescence of poly(N-vinylcarbazole) (PVCz) films doped with 1,2,4,5-tetracyanobenzene was investigated in comparison with exciplex (and/or exterplex) fluorescence of PVCz films doped with 1,4-dicyanobenzene by using the nanosecond time-correlated single-photon-counting method. For excitation of PVCz absorption band and CT absorption band, the fluorescence peak in the time-resolved spectra shifted continuously to short wavelength with time. The direction of the shift was opposite to that of the exterplex fluorescence. The dependence of the steady-state CT fluorescence intensity on concentration of the acceptor was also different from the exciplex system. These different behaviours of fluorescence dynamics between the CT and the exciplex systems were discussed from the viewpoint of the overlap of CT and exterplex fluorescence for the CT system and of a morphological change of PVCz films caused by formation of ground-state CT complexes.

引用

页码：3149 / 3155

页数：7

共 35 条

[11] FLUORESCENT STATES OF EXCIPLEX AND CHARGE-TRANSFER COMPLEXES - EXPERIMENTAL EVIDENCE FOR AN IDENTICAL FLUORESCENT STATE [J].