Jump to main content
Jump to site search


Intramolecular electronic coupling for persistent room-temperature luminescence for smartphone based time-gated fingerprint detection

Author affiliations

Abstract

It is desirable to develop pure organic molecules with persistent room temperature luminescence for time-resolved imaging on low-cost instruments. However, the persistent luminescence of many organic molecules is usually observed only in the crystalline state, limiting their broad range of applications in composites with low doping concentrations. Herein, we demonstrate a facile strategy to generate an emitter with long-lived luminescence in both crystalline and amorphous states. By utilizing intramolecular electronic coupling, CzDPS [9-9′-(sulfonylbis(2,1-phenylene))bis(9H-carbazole)] was designed and synthesized, which could emit persistent luminescence in crosslinked polymers with a doping concentration of only 1 wt%. Moreover, the ultra-long persistent luminescence of its powder crystals enables its use in time-resolved luminescence imaging of fingerprints by only using a smartphone under a UV LED. Notably, the interference from fluorescent substrates could be eliminated by photographing after turning off the light. This finding provides a new and facile strategy for forensic investigation of fingerprints which suffers from interference from the scattering and fluorescence signals of substrates.

Graphical abstract: Intramolecular electronic coupling for persistent room-temperature luminescence for smartphone based time-gated fingerprint detection

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Jan 2019, accepted on 05 Mar 2019 and first published on 09 Mar 2019


Article type: Communication
DOI: 10.1039/C9MH00130A
Citation: Mater. Horiz., 2019, Advance Article

  •   Request permissions

    Intramolecular electronic coupling for persistent room-temperature luminescence for smartphone based time-gated fingerprint detection

    D. Tian, Z. Zhu, L. Xu, H. Cong and J. Zhu, Mater. Horiz., 2019, Advance Article , DOI: 10.1039/C9MH00130A

Search articles by author

Spotlight

Advertisements