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Multi-photon AIE zinc (II) complexes for high-resolution visualization of latent fingerprints
Mengxin Cao1, Qiong Zhang1, Haifeng Tang1
1School of Chemistry and Chemical Engineering, Center of Free Electron Laser & High Magnetic Field, Key Laboratory of Structure and Functional Regulation of Hybrid Materials Ministry of Education, Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, and Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials of Anhui Province, Anhui University, PR China.
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It is very important to achieve high contrast latent fingerprints (LFPs) imaging in the face of challenges such as imaging blur, weak anti-background interference, and third-level detail loss. We construct a series of carbazole tripyridine zinc (II) complex probes (Zn-Kt1, Zn-Kt2 and Zn-Kt3) which can specifically identify oleic acid (OA) in LFPs, thus achieving high-quality LFPs imaging performance. These complexes exhibit high brightness and long-term imaging owing to three-photon AIE properties. Thanks to the excellent multi-photon excitation fluorescence characteristics of Zn-Kt1, the three-level details of LFP can be captured for high-resolution visualization. This work aims to provide a simple optical probe for rapid identification of personal information in criminal investigation activities.
