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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (24): 2473-2478. 上一篇    下一篇

研究论文

1,3,4-噁二唑衍生物的双光子吸收和双光子泵浦荧光

钱鹰*,1, 路志锋1, 吕昌贵2, 宋坤忠1, 崔一平2, 孙岳明1, 林保平1   

  1. (1东南大学化学化工学院 南京 210096)
    (2东南大学电子科学与工程学院 南京 210096)
  • 投稿日期:2006-04-15 修回日期:2006-07-30 发布日期:2006-12-28
  • 通讯作者: 钱鹰

Two-Photon Absorption and Two-Photon Excited Fluorescence of 1,3,4-Oxadiazole Derivatives

QIAN Ying*,1; LU Zhi-Feng1; LÜ Chang-Gui2; SONG Kun-Zhong1; CUI Yi-Ping2; SUN Yue-Ming1; LIN Bao-Ping1   

  1. (1 School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096)
    (2 School of Electronic Science and Engineering, Southeast University, Nanjing 210096)
  • Received:2006-04-15 Revised:2006-07-30 Published:2006-12-28
  • Contact: QIAN Ying

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824

被引次数

13 | 2

依据“推电子基-共轭中心-拉电子基-共轭中心-推电子基”的模型将电荷传输型1,3,4-噁二唑环嵌入芳香共轭体中, 通过Wittig-Horner反应合成了2种对称型强双光子吸收和双光子诱导荧光分子2,5-二[4-(2-芳基乙烯基)苯基]-1,3,4-噁二唑. 它们的氯仿溶液在锁模Nd: YAG激光器800 nm激光照射下, 发射出很强的双光子上转换荧光, 其最强荧光分别在波长507和475 nm. 采用非线性透过率法测得其双光子吸收截面分别为1.07×10－46和6.6×10－47 cm4•s•photon－1. 这2个对称型D-π-A-π-D生色分子从激发端基到π共轭桥的有效能量传输, 对双光子吸收和双光子荧光发射能力贡献较大.

关键词: 噁二唑衍生物, 双光子荧光, 双光子吸收截面

Two symmetrical 2,5-bis[4-(2-arylvinyl)phenyl]-1,3,4-oxadiazoles that exhibit strong two-photon absorption and enhanced two-photon excited fluorescence were designed and synthesized based on “push-core-pull-core-push” molecules built from embedding electron-transporting 1,3,4-oxadiazole in aromatic conjugated system through Wittig-Horner reaction. Pumped by nanosecond laser at 800 nm, strong up-conversion emissions with the central wavelength at 507 and 475 nm in the solution of CHCl3 have been observed. Their two-photon absorption cross-sections obtained by nonlinear transmission method are 1.07× 10－46 and 6.6×10－47 cm4•s•photon－1. A very effective energy transfer from the excited terminal units to the π-conjugated bridging units of the two symmetrical D-π-A-π-D chromophores make the dominant contribution to the two-photon absorption and two-photon excited fluorescence.

Key words: 1,3,4-oxadiazole derivative, two-photon excited fluorescence, two-photon absorption cross- section