Phenothiazin-N-yl-capped 1,4-diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole exhibiting strong two-photon absorption and aggregation-enhanced one- and two-photon excitation red fluorescence
Phenothiazin-N-yl-capped 1,4-diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole exhibiting strong two-photon absorption and aggregation-enhanced one- and two-photon excitation red fluorescence
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吩噻嗪-N-基封端的 1,4-二酮-3,6-二苯基吡咯并[3,4-c]吡咯表现出强双光子吸收和聚集增强的单光子和双光子激发红色荧光
DOI：
10.1039/c7ra04531j
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Yang Wenjun
中科院分区：
文献类型：
--
作者：
Zhang Kai;Liu Zhongwei;Ying Shian;Chen Mingshuai;Xue Shanfeng;Zhang Haichang;Yang Wenjun
具有强荧光和大双光子吸收（2 PA）截面的水溶性或水分散性双光子染料对于纳米和生物光子学是非常理想的，但仍然稀缺。本文合成了一种新的1，4-二酮基-3，6-二苯基吡咯并[3，4-c]吡咯衍生物（PDPP），并研究了其单光子和双光子光学性质。结果表明，PDPP在水分散液和结晶状态下均表现出不依赖于溶剂的单光子溶液吸收和发射特性，荧光量子产率较低，但具有较强的红色荧光。这种聚集增强发射（AEE）效应使PDPP不仅具有大的2 PA截面，而且在水性分散体中具有显著增强的双光子荧光作用截面。因此，2 PA激活的PDPP是双光子科学和技术的一个有希望的候选者。
Water-soluble or water-dispersible two-photon dyes with strong fluorescence and large two-photon absorption (2PA) cross sections are very desirable for nano- and bio-photonics, but are still scarce. Herein, a new 1,4-diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole derivative end-capped with two phenothiazin-N-yl donors (PDPP) is synthesized and its one- and two-photon optical properties are investigated in both solution and aqueous dispersions. The results show that PDPP exhibits solvent-independent one-photon solution absorption and emission properties with low fluorescence quantum yields, but strong red fluorescence in both aqueous dispersion and the crystalline state. This aggregation-enhanced emission (AEE) effect enables PDPP to have not only large 2PA cross sections but also a remarkably enhanced two-photon fluorescence action cross section in aqueous dispersions. Thus, 2PA-active PDPP is a promising candidate for two-photon science and technology.