A morphology and size-dependent ON-OFF switchable NIR-emitting naphthothiazolium cyanine dye: AIE-active CIEE effect

A morphology and size-dependent ON-OFF switchable NIR-emitting naphthothiazolium cyanine dye: AIE-active CIEE effect
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形态和尺寸依赖性开关可切换近红外发射萘并噻唑花青染料:AIE 活性 CIEE 效应

DOI:
10.1016/j.optmat.2017.03.018
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发表时间:
2017-04
期刊:
影响因子:
3.9
通讯作者:
Yang Changying
Yang Changying
中科院分区:
材料科学3区
文献类型:
--
作者:
Yang Wei;Liu Chunlin;Gao Qingyun;Du Jinya;Shen Ping;Liu Yi;Yang Changying

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合成了一种新型近红外菁染料2-[4-N,N-二苯氨基苯乙烯基] -β-萘并噻唑丙磺酸盐(N3)。N3在含水率(fw)> 70%的DMSO/H_2O混合体系中表现出明显的尺寸依赖聚集诱导发光(AIE)特性。纳米颗粒的形成有利于荧光发射,而较大尺寸的团聚导致减少。在固体中,N3表现出晶体诱导发射增强(CIEE),其近红外发射行为是形态依赖性的。当研磨时,明亮的发光晶体粉末(λem= 687 nm)(ON状态)转变为不发光的非晶态(OFF状态)。智能荧光开-关特性可以通过研磨和加热或溶剂发烟可逆地调节。提出了构建压力或温度物理传感器、挥发性有机化合物(VOCs)化学传感器以及数据存储技术的可能策略。
A novel near-infrared (NIR) emitting cyanine dye, 2-[4-N,N-diphenylaminostyryl] -β-naphthothiazolium propylsulfonate (N3), has been newly developed. N3 exhibits striking size-dependent aggregation-induced emission (AIE) characteristic in DMSO/H2O mixtures with water fractions (fw) > 70%. The formation of nanoparticles is advantageous for fluorescence emission, while larger size agglomeration leads to a reduction. In solid,N3shows crystal-induced emission enhancement (CIEE) and its NIR emissive behavior is morphology-dependent. The brightly emissive crystalline powder (λem= 687 nm) (ON state) is transformed into non-emissive amorphous state (OFF state) when grinding. The smart fluorescent ON-OFF properties can be reversibly tuned by grinding and heating or solvent fuming. Possible strategies to construct the physical sensor for pressure or temperature, chemosensor for volatile organic compounds (VOCs), as well as the technology for data storage are disclosed.
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