Two-photon absorption and piezofluorochromism of aggregation-enhanced emission 2,6-bis(p-dibutylaminostyryl)-9,10-bis(4-pyridylvinyl-2)anthracene
Two-photon absorption and piezofluorochromism of aggregation-enhanced emission 2,6-bis(p-dibutylaminostyryl)-9,10-bis(4-pyridylvinyl-2)anthracene
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DOI：
10.1016/j.dyepig.2014.08.025
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发表时间：
2015-02
影响因子：
4.5
通讯作者：
Deteng Zhang;Yangyang Gao;Jing Dong;Q. Sun;W. Liu;S. Xue;Wenjun Yang
中科院分区：
文献类型：
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作者：
Deteng Zhang;Yangyang Gao;Jing Dong;Q. Sun;W. Liu;S. Xue;Wenjun Yang
十字形2，6-双（对二丁基氨基苯乙烯基）-9，10-双（4-吡啶基乙烯基-2）蒽（DAB）是一种具有聚集增强发光效应的含给体-受体的二维交叉共轭发光体，本文报道了它在不同溶剂中的单光子和双光子吸收和荧光性质以及它的固态压致荧光色性。结果表明，DAB具有很强的溶剂化变色效应，其双光子吸收截面与溶剂有关。在二氯甲烷、四氢呋喃和甲苯溶液中测得的最大双光子吸收截面值分别为670、1840和2030 GM。压致荧光实验表明，经压制和退火处理后，DAB固体的荧光颜色和发射光谱在红光（617 nm）和深红光（654 nm）之间发生可逆变化。粉末广角X射线衍射和差示扫描量热分析表明，该材料的压致荧光变色行为是由外界刺激引起的晶态和非晶态之间的相变引起的。
Cruciform 2,6-bis(p-dibutylaminostyryl)-9,10-bis(4-pyridylvinyl-2)anthracene (DAB) is a donor–acceptor-containing two-dimensionally cross-conjugated luminogen exhibiting the aggregation-enhanced emission effect, here we report its one- and two-photon absorption and fluorescence properties in different solvents and its solid-state piezofluorochromism. It is found thatDABexhibits strong solvatochromic effect and its two-photon absorption cross sections are solvent-dependent. The maximal two-photon absorption cross sections values measured in dichloromethane, tetrahydrofuran, and toluene solutions are 670, 1840, and 2030 GM, respectively. Piezofluorochromic experiment shows that the fluorescence color and emission spectrum ofDABsolid could be changed reversibly between red (617 nm) and deep red (654 nm) emissions upon pressing and annealing. Powder wide-angle X-ray diffraction and differential scanning calorimetric analyses reveal that the Piezofluorochromic behavior is caused by the external stimuli-induced phase transformation between crystalline and amorphous states.