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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (23): 2765-2770. 上一篇    下一篇

研究论文

对位氨基能显著提高D-A-D型化合物的双光子吸收性能

黄池宝*, 任安祥   

  1. (韶关大学英东生物工程学院农业工程系 韶关 512005)
  • 投稿日期:2007-01-20 修回日期:2007-03-23 发布日期:2007-12-14
  • 通讯作者: 黄池宝

Prominent Improvement of the Two-photon Absorption Ability of D-A-D Compounds due to Contraposition Amino Group

HUANG Chi-Bao*; REN An-Xiang   

  1. (Department of Agricultural Engineering, Yingdong Bioengineering College, Shaoguan University, Shaoguan 512005)
  • Received:2007-01-20 Revised:2007-03-23 Published:2007-12-14
  • Contact: HUANG Chi-Bao

PDF

759

被引次数

8

报道了具有典型D-A-D型共轭结构的反式2,5-二氰基-1,4-二(4'-甲氧基苯乙烯基)苯(MOS-CN), 2,5-二氰基-1,4-二(4'-二甲胺基苯乙烯基)苯(MAS-CN)和1,4-二(4'-甲氧基苯乙烯基)苯(MOS)的合成. 用核磁、红外和元素分析进行了表征. 测试了紫外吸收光谱、单光子荧光光谱、双光子荧光光谱、双光子吸收系数及双光子吸收截面. 在800 nm的飞秒脉冲激光激发下, 化合物MOS-CN, MAS-CN和MOS分别发出很强的绿色、黄色和蓝色上转换荧光. 化合物MOS-CN, MAS-CN和MOS的最大吸收波长、单光子发射波长、双光子诱导荧光波长、荧光量子产率、双光子吸收系数、双光子吸收截面及双光子荧光寿命各分别是393, 473, 367 nm; 470, 569, 434 nm; 475, 574, 438 nm; 0.12, 0.72, 0.21; 0.8, 5.3, 0.3 cm/GW; 270, 1790, 101 GM; 140 ps, 1.32 ns, 54 ps. MAS-CN的双光子吸收截面是MOS-CN的6.63倍, MOS-CN的双光子吸收截面是MOS的2.67倍, 表明对位氨基显著地提高了化合物的双光子吸收性能, 氰基也较大地提高了双光子吸收截面.

关键词: 合成, 双光子吸收, 上转换荧光

The syntheses of 2,5-dicyano-1,4-bis-(4'-methoxystyryl)benzene (MOS-CN), 2,5-dicyano-1,4- bis-(4'-dimethylaminostyryl)benzene (MAS-CN) and 1,4-bis-(4'-methoxystyryl)benzene (MOS) with typical D-A-D conjugation structure were reported. Their structures were characterized by 1H NMR, IR and elemental analyses. Linear absorption, single-photon induced fluorescence, two-photon induced fluorescence and two-photon absorption cross section (σ2) are experimentally studied. While pumped with 800 nm laser irradiation, these three compounds showed strong two-photon induced green, yellow and blue fluorescence, respectively. The maximum absorption wavelengths, single-photon emission wavelengths, two-photon induced fluorescence wavelengths, fluorescence quantum yields, two-photon absorption coefficients, two-photon absorption cross sections (σ2) and two-photon fluorescence lifetimes of MOS-CN, MAS-CN and MOS were 393, 473, 367 nm; 470, 569, 434 nm; 475, 574, 438 nm; 0.12, 0.72, 0.21; 0.8, 5.3, 0.3 cm/GW; 270, 1790, 101 GM; 140 ps, 1.32 ns, 54 ps, respectively. The σ2 of MAS-CN was 6.63 times that of MOS-CN, and σ2 of MOS-CN was 2.67 times that of MOS, which manifested that a contraposition amino group could prominently improve the two-photon absorption ability of such D-A-D compounds, and cyano groups could also make a great contribution to σ2 .

Key words: synthesis, two-photon absorption, upconversion fluorescence