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Dynamic anti-counterfeiting security features using multicolor dianthryl sulfoxides.

Jennifer Yuan¹, Peter R Christensen¹, Michael O Wolf¹

¹Department of Chemistry , University of British Columbia , 2036 Main Mall , Vancouver , British Columbia V6T 1Z1 , Canada .

Chemical Science

|February 15, 2020

Summary

This summary is machine-generated.

New security inks use photoactive dyes that change fluorescence color when irradiated. This creates difficult-to-replicate anti-counterfeiting features authenticated by smartphone apps analyzing Commission international de l'éclairage coordinates.

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Area of Science:

Photochemistry
Materials Science
Analytical Chemistry

Background:

Advanced anti-counterfeiting measures are crucial for product security.
Replication of security features remains a significant challenge.
Novel materials with unique, dynamic properties are needed.

Purpose of the Study:

To introduce a novel concept for difficult-to-replicate security inks.
To develop photoactive dyes for advanced anti-counterfeiting applications.
To create dynamic security features with unique authentication methods.

Main Methods:

Fabrication of inks from a mixture of photoactive dyes: substituted 9,9'-dianthryl sulfoxides.
Photochemical extrusion of a sulfoxide moiety (SO) to produce emissive emitters (red, blue, green).
Analysis of Commission international de l'éclairage (CIE) coordinates and temporal fluorescence evolution using a smartphone application.

Main Results:

Photoactive dyes exhibit unique fluorescence color changes upon irradiation.
Emissive features possess specific CIE coordinates for authentication.
Differential photoconversion rates dependent on irradiation wavelength enable selective activation.
Smartphone application successfully extracts CIE coordinates for validation.

Conclusions:

The developed security inks offer a novel, difficult-to-replicate anti-counterfeiting solution.
The dynamic nature of fluorescence and selective wavelength activation enhance security.
Integration with smartphone technology provides an accessible authentication method.