Qiu Jin , Renping Zeng , Xinghang Chen , Zi You , Weibin Bai , Huanping Yang
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引用次数: 0
Abstract
Fluorescent hydrogels have been widely used in many fields due to their unique luminescent properties and good physical and chemical properties. Due to the different substitution points of naphthyl groups, two asymmetric naphthyl-substituted diaryldibenzofulvenes of NPF were prepared through the Suzuki reaction, exhibiting good aggregation induced emission (AIE) performance. Among them, the product of NPF-1 showed cyan fluorescence. The emission of NPF-2 ranged from cyan to yellow green with increasing water content in THF/water solutions. The two AIE compounds were added into the polyacrylamide hydrogels though physical blending method. By adjusting the oil/water ratio and NPF contents, the different fluorescence emission could be achieved from the prepared fluorescent hydrogels. The NPF-1 based hydrogels emitted cyan light, while 2-NPF based hydrogels displayed a shifted emission from cyan to yellow green fluorescence. The NPF hydrogels showed fluorescence emission change response to the specific ions (Fe3+, Co2+), due to the weak cross-linking between ions and hydrogel matrix. Meanwhile, the weak interaction could be unlocked by H+ in HCl solution, which restored the fluorescence properties of the NPF hydrogels, thereby demonstrating excellent switch response cycle stability. The design combination patterns of NPF FL hydrogels and the fluorescent switching behaviors triggered by ion/H+ could be applied in anti-counterfeiting and decryption. Thereby, the multicolor-emitting fluorescent NPF hydrogels with unique ion switch response display the potential in applications in information storage, information recognition, information encryption, and other areas.
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.
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