Fluorene as the π-spacer for new two-photon absorption chromophores

TETRAHEDRON

卷:67

Article

Cheng, Jian-Zhang¹  Lin, Chao-Chen¹  Chou, Pi-Tai¹  Chaskar, Atul¹  Wong, Ken-Tsung¹ 

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

关键词: Two-photon absorption;    Fluorene;    Quadrupolar;   

DOI  :  10.1016/j.tet.2010.11.071

来源: Elsevier

【 摘 要 】

We report herein the design and synthesis of two new quadrupolar D-pi-A-pi-D chromophores containing diphenyl amine and dicyanobenzene or 2,1,3-benzothiadiazole as electron donor (D) and acceptor (A), respectively, which are bridged by fluorene linkage (pi). The introduction of coplanar fluorenes is highly beneficial for the enhancement of two-photon absorption (TPA), where 1b displays a TPA cross section (sigma(2)) of up to 1975 +/- 207 GM. (C) 2010 Elsevier Ltd. All rights reserved.

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