A rational design of AIE‐active fluorophore for the fingerprint optical detection

Abstract

Fingerprints are one of the distinguishing characteristics of an individual, remaining unaltered throughout one's lifetime. It should be noted that fingerprints are significant and reliable evidence in various cases, such as criminal investigations, medical diagnosis, and public security. Thus, it is necessary to develop efficient techniques for fingerprints detection. Fortunately, the fluorescence emission of aggregation-induced emission (AIE) materials would increase instead of quenching upon excitation when they label fingerprints, which would clearly observe the structure of fingerprints. Herein, we devised a novel AIE-active fluorophore (NI-DB) with electron donor-π bridge-electron acceptor (D-π-A) structure based on the 1,8-naphthalimide. To our delight, after fingerprints fixed by cyanoacrylate glue fuming, NI-DB is capable of detecting and imaging fingerprints via its intrinsic fluorescence emission. And, with the aid of this technique, fingerprints on various object surfaces are successfully developed, suggesting the broad applicability.

A geometric key for enhancing the radiative efficiency of ortho‐carboranyl luminophores: Indolocarbazole‐ and m‐terphenyl‐ortho‐carboranes

“…Consequently, only ICzCB demonstrated a distinct yellow emission (insets in Figure 4) centered at 558 nm in the most aggregated state ( f w = 90%), similar to that observed in the solid (film) state. This behavior was attributed to aggregation‐induced emission (AIE) 36 . The AIE effect may be attributed to the enhanced efficiency of the ICT‐based radiative decay owing to the geometric rigidity of the solid state.…”

“…This behavior was attributed to aggregation-induced emission (AIE). 36 The AIE effect may be attributed to the enhanced efficiency of the ICT-based radiative decay owing to the geometric rigidity of the solid state. The AIE phenomenon of mTPCB could not be observed despite its rigid state.…”

Trifluoroacetyl‐effect on amino‐single benzene‐based fluorophores: Synthesis, optical properties, and cytotoxicity

“…Organic fluorophores have been widely used across basic research, industry, and medical fields. [1][2][3][4][5] The photophysical properties of organic fluorophores correlate with their delocalized electronic structure. 6 Well-known fluorophores such as rhodamine, fluorescein, and coumarin have expanded the pi-conjugation molecular backbone inherent in their aromatic core and have established rational involves a push-pull system of electron donor-bridge-acceptor (D-bridge-A).…”

Simple Donor–π–Acceptor Compounds Exhibiting Aggregation-Induced Emission as Hidden Fingerprints Detecting Agents

“…It involves exposing the material (which we believe has hidden fingerprints) to cyanoacrylate (otherwise known as super glue) at elevated temperature and humidity in a closed chamber. In the presence of glue, a polymer forms on the surface of the fingerprint stripes, making them visible [16,17].…”