Nonlinear transmission and excited-state absorption in fluorene derivatives

被引：11

作者：

Belfield, KD

Bondar, MV

Hernandez, FE

Morales, AR

Przhonska, OV

Schafer, KJ

机构：

[1] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA

[2] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA

[3] Univ Cent Florida, Coll Opt & Photon, FPCE, Orlando, FL 32816 USA

[4] Inst Phys, UA-03028 Kiev, Ukraine

来源：

APPLIED OPTICS | 2004年 / 43卷 / 34期

关键词：

D O I：

10.1364/AO.43.006339

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The nonlinear transmission and the excited-state absorption spectra of three fluorene derivatives exhibiting large two-photon absorptivity were measured by the third harmonic of a picosecond Nd:YAG laser. We analyzed their capability for exhibiting stimulated emission in polar solvents and found that asymmetrical fluorene compounds with a diphenylamino substituent exhibited large Stokes shifts (similar to8000 cm(-1)), high quantum yields (similar to0.9-1.0), and no optical gain over their entire fluorescence spectral region. In contrast, a symmetrical fluorene derivative with vinylphenylbenzothiazole substituents in positions 2 and 7 underwent lasing tinder one-photon excitation by use of picosecond pulsed irradiation. (C) 2004 Optical Society of America.

引用

页码：6339 / 6343

页数：5

共 23 条

[1] Molecular environment effects on two-photon-absorbing heterocyclic chromophores [J].