Spectroscopic evidence of fluorescence by 1,8‐diazafluoren‐9‐one aggregates—A prospective new ultrasensitive method for fingerprint trace detection

Lewkowicz, Aneta; Kantor, Małgorzata; Zalewski, Wojciech; Bojarski, Piotr; Mońka, Michał

doi:10.1111/1556-4029.15039

Cited by 5 publications

(9 citation statements)

References 27 publications

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“…In addition, using the quantum chemical calculations, we confirmed the energetic tendency of the DFO molecule to aggregate with a preference for the dimer structure formation. This result is strongly compatible with our recent publication results [ 21 , 22 , 23 ], where we confirmed the aggregation ability of DFO in ethanol and the emission of DFO aggregates in ethanol with an emission maximum at a similar wavelength as the DFO complex with glycine (an alpha-amino acid). These results significantly affect the application of DFO in Friction Ridge Analysis and are predictive of the application of DFO on different types of substrates with different surface energy characteristics.…”

Section: Discussionsupporting

confidence: 93%

“…Changes in the structure of the DFO molecule are responsible for the observed concentration changes for the two matrices. In earlier work, we indicated the ability of DFO to aggregate [ 22 , 23 ]. In this work, we confirm this once again.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, it is worth noting that aggregation processes are often overlooked in the interpretation of spectroscopic properties, as evidenced by current procedures for the visualization of dactyloscopic traces with DFO. DFO working solutions contain high concentrations of DFO, and in the process of visualization of dactyloscopic traces, not only DFO complexes with amino acids but also DFO aggregates are involved, as indicated by our previous work [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 87%

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Nonconventional 1,8-Diazafluoren-9-One Aggregates for Green Light Enhancement in Hybrid Biocompatible Media

et al. 2022

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Organic aggregates currently play a prominent role, mainly for their unique optoelectronic properties in the aggregated state. Such properties can be related to the aggregates’ structure and the molecular packing mode. In the literature, we have well-established models of H and J aggregates defined based on the molecular exciton model. However, unconventional aggregates, the most unrecognized forms, have been generating interest among researchers recently. Within unconventional aggregation, aggregation-induced emission systems (AIE) are considered. In the present work, we discuss the effect of the forming of unconventional aggregation together with the change in dye concentration on the surface energy characteristics of the materials. All materials were prepared as hybrid biocompatible thin films where the matrix is TiO2 or TiO2/carbon nanowalls (CNWs) with the incorporated dye in the form of 1,8-diazafluoren-9-one (DFO). Using the time-resolved emission spectra and the determination of surface parameters from contact angle measurements, we indicated the correlation between the changes in such parameters and the concentration of DFO dye in two types of TiO2 and TiO2/CNW structures. To examine the propensity of DFO for aggregation, the internal energy of the dye was assessed in several aggregate structures using Quantum chemistry calculations. The results emphasize that DFO is an attractive structure in the design of new fluorophores due to its low molecular weight, the presence of a nitrogen atom that provides good coordination properties, and the ability to form hydrogen bonds. Our studies show that when using suitable matrices, i.e., rigid media, it forms the preferred forms of aggregates in the excited state, characterized by high emission efficiency in the band maximum of around 550 nm.

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Section: Discussionsupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

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Nonconventional 1,8-Diazafluoren-9-One Aggregates for Green Light Enhancement in Hybrid Biocompatible Media

et al. 2022

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“…Relative to ninhydrin, o -phthalaldehyde and 1,8-diazafluoren-9-one are the two sensitive reagents [ 43 , 44 , 45 ]. Jones et al [ 43 ] has established a spectrofluorometric method, based on o -phthalaldehyde, for rapidly and sensitively quantitating total free amino acids in soil.…”

Section: Resultsmentioning

confidence: 99%

Sensitivity Intensified Ninhydrin-Based Chromogenic System by Ethanol-Ethyl Acetate: Application to Relative Quantitation of GABA

Wang

Nie

et al. 2023

Metabolites

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Gamma-aminobutyric acid (GABA) is a functional metabolite in various organisms. Herein, a sensitivity intensified ninhydrin-based chromogenic system (SINICS), achieved by ethanol and ethyl acetate, is described for the reliable relative quantitation of GABA. A 2.9 mL SINICS kit comprises 1% ninhydrin, 40% ethanol, 25% ethyl acetate, and 35 μL 0.2 M sodium acetate buffer (pH 5.0). In practice, following the addition of a 0.1 mL sample to the kit, the chromogenic reaction is completed by heating at 70 °C for 30 min. The kit increased the color development sensitivity of L-glutamic acid and GABA, with the detection limits being reduced from 20 mM and 200 mM to 5 mM and 20 mM, respectively. The chromophore was stable for at least 2 h at room temperature, which was sufficient for a routine colorimetric analysis. The absorbance at 570 nm with the deduction of background directly represents the content of amino acid. For a proof-of-concept, the SINICS was adopted to optimize the GABA fermentation process of Levilactobacillus brevis CD0817. The results demonstrated that SINICS is an attractive alternative to the available ninhydrin-based colorimetric methods.

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“…[2][3][4][5] To this end, a mass of nanoparticles was reported as fingerprint developers, [6][7][8][9][10] such as iron, titanium, europium, cobalt and silicon oxides or their alloys. In addition, during the last decade, a variety of nanophosphors, including semiconducting metal/polymer dots, [11][12] organic aggregate luminogens, [13][14][15] rare earth-based powders, [16][17][18][19][20][21] metal-organic frameworks, [22][23][24] fluorescent carbon dots, [25][26][27][28][29][30][31][32][33] noble metal nanoclusters [34][35][36][37] and perovskite nanocrystals [38][39][40] have gradually become the mainstream for fingerprint development applications. In theory, the high or color-tunable fluorescence of nanophosphors can enhance the contrast of developed fingerprints on various backgrounds.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic‐Binding‐Driven and Fluoresence‐Free Development of Aged Fingerprints Based on Zinc Oxide Nanoparticles

Peng

2022

ChemistrySelect

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The requirement of nonfluorescent developers for aged latent fingerprint development is still of great urgency in forensic science. To enhance the specific interaction between fingerprint residue and nano-developers, a γ-methacryloxy propyl trimethoxyl silane (MPTS) modified zinc oxide nanoparticle (ZnO NP) was synthesized. The crystal structure, morphology, surface functional group, thermostability, UV/Vis spectra, photoluminescence and stability of sedimentation were characterized to prove the hydrophobicity, UV blocking nature and nonfluorescence of as-prepared MPTS-modified ZnO NPs. Additionally, after the specific surface area (SSA) of samples with different MPTS amount was analyzed by BET, a competitive adsorption mechanism between silane-ZnO bonding and silane oligomer-ZnO deposition was suggested. In the demonstration of latent fingerprint development, the powder dusting method was utilized on various surfaces both in positive and reversed imaging modes, exhibiting the high contrast, high sensitivity, high selectivity and wide applicability, even for aged fingerprints. Therefore, it provides a new strategy for fast, efficient and inexpensive development of older latent fingerprints in forensic analysis.

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Spectroscopic evidence of fluorescence by 1,8‐diazafluoren‐9‐one aggregates—A prospective new ultrasensitive method for fingerprint trace detection

Abstract: Friction ridge analysis would not have been one of the most recognized branches of forensics without molecular spectroscopy. The phenomenon of fluorescence is used on daily basis to develop latent fingerprints and to enhance those that are visible.

Cited by 5 publications

References 27 publications

Nonconventional 1,8-Diazafluoren-9-One Aggregates for Green Light Enhancement in Hybrid Biocompatible Media

Nonconventional 1,8-Diazafluoren-9-One Aggregates for Green Light Enhancement in Hybrid Biocompatible Media

Sensitivity Intensified Ninhydrin-Based Chromogenic System by Ethanol-Ethyl Acetate: Application to Relative Quantitation of GABA

Hydrophobic‐Binding‐Driven and Fluoresence‐Free Development of Aged Fingerprints Based on Zinc Oxide Nanoparticles

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