Phenanthrolinchinone und Diazafluorene
TL;DR: In this article, die Darstellung der 5,6-Chinone der drei isomeren Phenanthrolinen beschrieben werden durch Ringverengung uber die Diazafluorenone die entsprechenden neuen Grundkorper, das 1,5-, 1,8, and das 4,5-Diazafluoren gewonnen.
Abstract: Es wird die Darstellung der 5,6-Chinone der drei isomeren Phenanthrolinen beschrieben. Aus den Chinonen werden durch Ringverengung uber die Diazafluorenone die entsprechenden neuen Grundkorper, das 1,5-, 1,8- und das 4,5-Diazafluoren gewonnen.
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TL;DR: A brief overview is provided, including an historical background, forensic significance, and a general approach to the development of latent fingermarks on porous surfaces, followed by a discussion of specific amino acid sensitive treatments.
121 citations
TL;DR: This tutorial review provides a short introduction to ninhydrin and highlights the different synthetic approaches used in the development of analogues for the detection of latent fingerprints.
Abstract: Following its discovery by Siegfried Ruhemann in 1910, ninhydrin rapidly became a practical analytical tool. In 1954 it was found to be an important reagent to develop fingerprints on porous surfaces. Since its use in forensic chemistry, many efforts have focused on improving the reagent. Many of the shortcomings of ninhydrin have been met by the synthesis of a variety of ninhydrin analogues. This tutorial review provides a short introduction to ninhydrin and highlights the different synthetic approaches used in the development of analogues for the detection of latent fingerprints.
118 citations
TL;DR: Fluorescent fingerprints visualized by DFO revealed more fingerprint detail than ninhydrin, the standard method for such surfaces.
Abstract: The use of a new amino acid reagent 1,8-diazafluoren-9-one (DFO), which produces a highly fluorescent species with latent fingerprints on paper, is described. Spectral characteristics of the fluorescent fingerprint show excitation (λex approximately 470 nm) and emission (λex approximately 570 nm) maxima in the visible part of the spectrum. Some printing inks fluoresce under these conditions and would therefore hinder fingerprint detection, but optical brighteners present in paper do not interfere. Fluorescent fingerprints visualized by DFO revealed more fingerprint detail than ninhydrin, the standard method for such surfaces.
93 citations
TL;DR: 1,8-Diazafluorenone (DFO) reacts with (α-amino acids and their esters via imine formation) to give decarboxylated azomethine ylides and ester substituted azomet hines respectively, providing a sensitive method for detecting latent fingerprints on paper.
78 citations
TL;DR: In this paper, the cyclopentadithiophenes (II-VI) in connection with studies of the charge transfer properties of dithienyls and related rigid analogs have been synthesized.
72 citations
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93 citations