Dinaphthalimide‐Glycol‐Based Fluorescent Powder for Imaging of Latent fingerprints: Case Studies in Fingerprinting

Abstract The DNPG , which consists of naphthalimides at terminal positions of pentaethylene glycol chain, was non covalently doped on nanoporous silica (SiO 2 ) and has been used as fluorescent powder for imaging of latent fingerprints (LFPs) on porous and non‐porous surfaces. We have successfully demonstrated the application of DNPG@SiO 2 fluorescent powder for visualization of level 1 (indexing), level 2 (minutiae points) and level 3 (sweat pores). We also attempted to establish the identity of the subject (person) in case studies on 12 subjects. The CIE‐1931 coordinates (x,y) of 0.2, 0.3 of DNPG showed green colour with 49.4 % purity and it possessed low cytotoxicity (IC 50 =139.5 uM).