Two-photon absorption properties of two (dicyanomethylene)-pyran derivatives

被引：14

作者：

Shao, Pin

Huang, Zhenli

Li, Jun

Chen, Sheng

Luo, Jianlin

Qin, Jingui ^{[1
]}

Liu, Bifeng

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

[2] Huazhong Univ Sci & Technol, Minist Educ, Key Lab Biomed Photon, Wuhan 430074, Peoples R China

来源：

OPTICAL MATERIALS | 2006年 / 29卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

two-photon absorption; (Dicyanomethylene)-pyran derivatives; Y type; fluorophores; femtosecond;

D O I：

10.1016/j.optmat.2005.08.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The two-photon absorption (TPA) properties of two fluorophores 4-(dicyanomethylene)-6-methyl-2-[2-[4-(diphenylamino)phenyl]ethenyl]-4H-pyran (DCM-TPA) and [2,6-bis[2-[4-(diphenylamino)phenyl]-ethenyl]-4H-pyran-4-ylidene]propanedinitrile (DADP) have been investigated. Both of them exhibit intense up-converted luminescence and large two-photon absorption cross-sections sigma(2) in the femtoseconds regime (sigma(2) of DADP is as high as 1298 x 10(-50) cm(4) s photon(-1) molecule(-1) with 80 fs laser pulses). The increase Of sigma(2) values from DCM-TPA to DADP is about five times. This could be ascribed to the extended pi-delocalization system and its two-dimensional charge transfer character. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：337 / 341

页数：5

共 20 条

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