43141-69-1Relevant articles and documents
Investigation of benzophenoxazine derivatives for the detection of latent fingerprints on porous surfaces
Alsolmy, Eman,Abdelwahab, Walid M.,Martinez, Vincent,Henary, Maged,Patonay, Gabor
, (2020/02/11)
In this report, two classes of benzophenoxazine dyes, Nile red and Nile blue derivatives, were evaluated for the detection of latent fingerprints on porous surfaces. The efficiency to develop fingerprints is influenced by the physical properties of the dye molecules including hydrophobicity as characterized by distribution coefficient value (logD), and other factors such as chemical structure of the dye and hydrogen bonds. Both Nile red and the basic form of Nile blue showed excellent to acceptable ability to detect fingerprints due to their great hydrophobicity at 515 and Crime Scene Search (CSS) settings of the forensic light source. Higher hydrophobicity derivatives of Nile red and Nile blue (in the basic form) improved both quality and sensitivity of fingerprint detection in comparison with their corresponding parent dyes. They developed strong luminescent and visible fingerprints, and a better contrast was achieved between impressions and the background surface suggesting the potential use of these compounds in forensic investigation. Therefore, the hydrophobic derivatives are considered dual-fingerprint reagents because the developed prints can be seen by the naked eye and under illumination process. However, lower hydrophobicity derivatives of Nile red and Nile blue and derivatives with different substituents developed weak or non-luminescent fingerprints with poor contrast. A complete analysis of what dye properties are the most important in fingerprint detection is discussed along with dye optimization for improved performance.
Inter-alkane amidogen phenolic synthetic method (by machine translation)
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, (2019/01/23)
Inter-alkane amidogen phenolic synthetic method, its characteristic is: 1st step, between the two alkane amidogen acyl aniline and sulfuric acid aqueous solution mixing and heating to 50 - 110 °C, thermal insulation reaction of aniline [...] sulfuric acid aqueous solution; 2nd step, continue to drip the sodium nitrite aqueous solution, sodium nitrite aqueous solution for dropping temperature of - 10 - 20 °C, drop bi yu 5 - 30 °C insulation, [...] aniline obtained diazonium salt of the sulfuric acid aqueous solution; 3rd step, [...] aniline diazonium salt of the sulfuric acid aqueous solution is directly heated to 45 - 110 °C, thermal insulation, in the hydrolysis reaction of the diazonium salt, cooling after treatment, to obtain the product between two alkane amidogen phenol; three-step required by the reaction of sulfuric acid in the 1st step reaction in the finished disposable adding; a three-step reaction in a finish step by step in the pot. The method of the invention with raw materials are cheap, abundant, synthetic high security of the process, the product yield is high, the three waste less pollution and the like, has high industrial value. (by machine translation)
Preparation method of N,N-dibutyl m-aminophenol
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, (2018/10/19)
The invention relates to a preparation method of N,N-dibutyl m-aminophenol. The preparation method comprises the following steps: firstly, carrying out alkylation reaction on sodium m-aminobenzene sulfonate, a solvent, halohydrocarbon and an acid binding agent to obtain an alkylate solution, wherein the alkylation reaction temperature is 80 to 200 DEG C and the alkylation reaction time is 2 to 5 hours; secondly, mixing the alkylate solution with an alkaline reagent and water for carrying out alkali fusion reaction to obtain alkylated sodium phenolate, wherein the alkali fusion reaction temperature is 200 to 350 DEG C and the reaction time is 1 to 3 hours; then adding water; thirdly, carrying out acid precipitation reaction on the alkylated sodium phenolate and an acidic reagent for 0.5 to3 hours to obtain a crude product of the N,N-dibutyl m-aminophenol; fourthly, refining to obtain the N,N-dibutyl m-aminophenol. The N,N-dibutyl m-aminophenol prepared by the preparation method disclosed by the invention has the advantages of high yield, low cost, capabilities of reducing by-product types and post-treatment burden.