Preparation and Application of a Composite Optical Switching Nanoparticle Tuneable to Stable White Light

Abstract

The invention discloses a preparation and application of composite light switch nano particles adjustable to stable white light. Styrene, 1,4-phenyl-bis((4-diphenylamine)phenyl) methanone and methacrylic acid-3,3-dimethyl-6-nitroindolin spiropyranyl ester are adopted as raw materials to prepare two nano particles in a one-step fine emulsion polymerization method. The nano particle adjustable to the stable white light is obtained by compositing the two nano particles. The composite nano particles have excellent light switch performance; and moreover, the composite nano particles can be used forthe data encryption and anti-counterfeiting. Compared with the existing light switch fluorescent nano particles, the obtained composite light switch nano particles can be adjusted to the stable whitelight, have the advantages of low investment cost, simple synthetic route and the like, are suitable for the amplified synthesis and the actual production application, and have great application prospect in the technical fields such as encryption, anti-counterfeiting, displaying, luminescence, super-resolution imaging, life science.

Description

technical field [0001] The invention relates to the preparation and application of an optical switch fluorescent nanometer material, in particular to a composite optical switch nanoparticle that can be adjusted to stable white light, which belongs to the preparation of chemical materials. Background technique [0002] In the past decade, in the design and synthesis of various optical switching fluorescent materials, materials with photochromic and reversible fluorescent switching properties are considered to be a class of materials that can be applied to high-density optical storage, anti-counterfeiting, encryption, complex biological New materials for system imaging. This kind of optical switch fluorescent material is generally obtained by combining a donor fluorescent dye and an acceptor photochromic compound (such as oxazine compounds, spiropyran compounds and azobenzene compounds, etc.) The valence bond connection, physical adsorption and other methods are combined into...

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Problems solved by technology

However, among the white light-based nanomaterials that have been developed so far, there are still very few nanomaterials with white light emission based on optical switches.

In the work of two white light nanomaterials based on diarylethene (Chem.Sci., 2016, 7, 5867-5871; Nat. Commun., 2014, 5, 3799), the former can only obtain white light in the transition state , and cannot obtain stable white light

The latter is a complex three-primary-color mixing system, which is more complicated, and it still controls the disappearance of white light, but cannot control the generation of white light

In this work, diarylethene as a photosensitizer only quenches the white fluorescence, not the decisive group of white fluorescence. What is more noteworthy is that the conjugated polymer is prepared in this work. In the original complex diarylethene synthesis Complicates the synthesis process on the basis of

As we all know, diarylethene is used as a photosensitizer, and its synthesis is carried out at ultra-low temperature (-80°C) (Nat. Commun., 2014, 5, 5079), and the synthesis and preparation route is long and the yield is low. are very limited in practical applications

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