Nitro-Benzofurazanyl Ethers—A New Series of Fluorigenic Fingerprint Reagents

Almog, Joseph; Zeichner, Amos; Shifrina, Svetlana; Scharf, G.

doi:10.1520/jfs12363j

Cited by 13 publications

(8 citation statements)

References 15 publications

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“…Modern research into fluorescence techniques for latent fingerprint visualization started perhaps in 1976 with H. Ohki's report on the potential of fluorescamine as a fluorogenic reagent (2). Several other fluorogenic fingerprint reagents have been explored since (3–5). Menzel and Herod in 1982 found that treatment of weak ninhydrin‐developed fingerprints with zinc chloride changed the color of the prints from purple to orange, and the prints also exhibited visible fluorescence upon excitation with an argon‐ion laser (6).…”

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confidence: 99%

Fingerprint Reagents with Dual Action: Color and Fluorescence

Almog¹,

Levinton-Shamuilov²,

Cohen³

et al. 2007

Journal of Forensic Sciences

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We define "dual fingerprint reagents" as chemical formulations that produce with latent fingerprints in one stage impressions that are both colored and fluorescent. Solutions containing ninhydrin and group IIb metal salts appear to be true dual reagents. Application of these formulations to latent fingerprints on paper is as efficient as the two-step process beginning with ninhydrin and followed by treatment with metal salt. In the color mode, fingerprint detectability with the two ninhydrin-metal salt reagents (one with zinc chloride and the other with cadmium chloride) is comparable with that of ninhydrin itself, in spite of the difference in color. The sensitivity is significantly higher in the fluorescence mode. To view the latent impressions the exhibits are treated with ninhydrin-metal salt reagents and observed under white light illumination and under fluorescence conditions. Cooling to liquid nitrogen temperature enhances the fluorescence considerably. In the shorter wavelength domain, ninhydrin-metal salt reagents exhibit higher sensitivity than the recently reported dual reagent, genipin. The latter is advantageous, however, in the longer wavelength domain, on paper items with strong self-fluorescence, such as brown wrapping paper or paper printed with fluorescent ink. Upon reduction of the ninhydrin concentration 10-fold, ninhydrin-metal salt formulations become purely fluorogenic reagents; no color is noticed but the fluorescence is as intense as with concentrated solutions. Working at lower concentrations is an advantage from ecological and economical viewpoints.

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confidence: 99%

Fingerprint Reagents with Dual Action: Color and Fluorescence

Almog¹,

Levinton-Shamuilov²,

Cohen³

et al. 2007

Journal of Forensic Sciences

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“…They treated 3-chloro-4hydroxyquinolin-2(1H)-one (1a) with concentrated HNO 3 and glacial acetic acid mixture, which yielded compound 3. The same compound was also obtained by the treatment of 3-nitro-4-hydroxyquinolin-2(1H)-one (2) with HCl/H 2 O 2 . Upon heating 3 at 130-140°C, quinisatin (4a) was isolated (Scheme 1).…”

Section: Synthesismentioning

confidence: 94%

“…vic-Tricarbonyl compounds are important both as biologically active species and as interesting synthetic intermediates [1]. A number of vic-tricarbonyl compounds have been reported in the literature having marked significance in forensic sciences for the development of latent fingerprints [2]. As a result, the investigation of synthetic methodology of vicinal triketones has remained a particular interest for chemists [1].…”

Section: Introductionmentioning

confidence: 99%

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vic‐Tricarbonyl Compounds of Quinolines: Analogues of Ninhydrin: A Short Review

Ijaz

Shafqat

Ahamd

et al. 2019

Journal of Heterocyclic Chem

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in Wiley Online Library (wileyonlinelibrary.com).Derivatives of ninhydrin are extensively used in the field of forensic sciences as important latent fingerprint reagents. Many works have been performed upon their synthesis and reactivity, but there are many spaces to work on the compounds of quinoline-2,3,4(1H)-triones-analogues of ninhydrin, in both dimensions: synthesis and reactivity, and according to the best of our knowledge, not a single detailed or short compiled article has been published for these compounds. This review briefly summarizes the chemistry of quinoline-2,3,4(1H)-triones.Scheme 4. Photochemical approach to synthesize quinoline-2,3,4(1H)triones (4) with singlet oxygen. MB, methylene blue; RB, rose bengal.Scheme 5. Thermal approach to synthesize quinoline-2,3,4(1H)-triones (4) form 4-hydroxyquinolin-2(1H)-ones (5) using phenyliodine(III) diacetate as oxidizing agent. Scheme 6. Reactions of quinoline-2,3,4(1H)-triones (4) with diazoalkanes. THF, tetrahydrofuran.

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“…Improvements in sensitivity have also been reported for the combination of Ruhemann's Purple (the reaction product of ninhydrin and amino acids) with selected metals to form fluorescent coordination products (14)(15)(16). Fluorogenic Reagents Some fluorogenic reagents have also been used to detect latent fingerprints because they can react with secreted amino acids to form fluorescent ridge patterns (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31). In fact, many fluorogenic reagents are potentially useful due to their application in the determination of amino acid concentration in solution.…”

Section: Colorimetric Reagentsmentioning

confidence: 99%