FEMTOSECOND SPECTRAL RELAXATION OF ALPHA-CONJUGATED HEXAMETHYLSEXITHIOPHENE IN SOLUTION

被引：38

作者：

LANZANI, G

NISOLI, M

MAGNI, V

DESILVESTRI, S

BARBARELLA, G

ZAMBIANCHI, M

TUBINO, R

机构：

[1] CNR, CTR ELETRON QUANTIST & STRUMENTAZ ELETTR, DIPARTIMENTO FIS, MILAN, ITALY

[2] CNR, IST COMPOSTI CARBONIO CONTENENTI ETEROATOMI LORO, BOLOGNA, ITALY

[3] UNIV MILAN, DIPARTIMENTO FIS, MILAN, ITALY

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.51.13770

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of ring rotation on both thermalization and decay kinetics of the excited state in methyl-substituted sexithiophene are investigated in solution by femtosecond pump and probe experiments. Electron-ring torsion coupling is proposed to play a fundamental role in leading to a slow spectral relaxation of the emitting state and driving the internal conversion to the ground state. Within our model, planarization of the excited state takes place in 4 ps in chloroform solution. The recovery of the excited-state population has been measured up to 500 ps in a broad range of probe wavelength from 490 nm up to 1 m. © 1995 The American Physical Society.

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页码：13770 / 13773

页数：4

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