Zhengwen Ning , Guangming Wang , Xun Li , Yuming Su , Qianqian Yan , Haodong Li , Shixue Ren , Kaka Zhang
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引用次数: 0
Abstract
Dyes in industrial wastewater are often toxic, polluting the environment, and harmful to animals and humans. The conventional methods of removing the dyes from wastewater are physical adsorption, precipitation, biodegradation, and photodegradation. Here we report the use of ionic liquids (ILs) to extract dyes from wastewater for the fabrication of fluorescence/afterglow materials. This method not only reduces the dye concentration by two to three orders of magnitude, but also obtains luminescent materials for anti-counterfeiting application. Diverse dyes such as rhodamine, acridones, difluoroboron compounds, and polycyclic aromatic hydrocarbons (PAHs) have been tested as model dyes in wastewater. In the case of rhodamine and some PAHs, fluorescence materials that exhibit diverse colors can be obtained after extraction by ILs. For difluoroboron compounds, room-temperature phosphorescence (RTP) materials have been achieved after extraction. Interestingly, in the case of acridones, the emergence of RTP/TADF dual afterglow emission has been evidenced in ILs, where TADF represents thermally activated delayed fluorescence. By the combination of these luminescent materials, lifetime-coded and multicolor-coded anti-counterfeiting functions have been demonstrated.
期刊介绍:
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.