Solvent dependent spectroscopic properties of fingerprint reagent - 1,8-Diazafluoren-9-one

Lewkowicz, Aneta; Baranowska, Karolina; Bojarski, Piotr; Józefowicz, Marek

doi:10.1016/j.molliq.2019.04.110

Cited by 10 publications

(15 citation statements)

References 33 publications

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“…However, the matrix remains chemically unmodified for all the samples and the effect of a potential significant polarity change of the whole matrix by only a concentration increase of DFO molecules seems rather unlikely. The location of the fluorescence peak of DFO by comparison to the fluorescence of DFO and other fluorenone-like molecules in liquid solutions [ 1 , 31 , 32 ] suggests that the TiO 2 matrix belongs to relatively nonpolar media. This is also in agreement with other results and discussions performed previously [ 25 , 26 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

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The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application

et al. 2020

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The investigation of innovative label-free α-amino acids detection methods represents a crucial step for the early diagnosis of several diseases. While 1,8-diazafluoren-9-one (DFO) is known in forensic application because of the fluorescent products by reacting with the amino acids present in the papillary exudate, its application for diagnostic purposes has not been fully investigated. The stabilization of DFO over a transparent substrate allows its complexation with biomolecules for the detection of α-amino acids. In this study, DFO was immobilized into a titanium dioxide (TiO2) matrix for the fluorescence detection of glycine, as a target α-amino acid (a potential marker of the urogenital tract cancers). The DFO/TiO2 composite was characterized by atomic force microscopy, spectroscopic ellipsometry, fluorescence spectroscopy and fluorescence microscopy. The performed fluorescent studies indicate spectacular formation of aggregates at higher concentration. The measurements performed using various fluorescence and microscopic techniques together with the suitable analysis show that the aggregates are able to emit short-lived fluorescence.

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Section: Resultsmentioning

confidence: 99%

“…In our previous study, we investigated the solvation effects and the influence on the lowest singlet excited state of DFO. It was shown that, in protic environments, DFO forms a solute-solvent hydrogen bond complex in its ground and excited state [1].…”

Section: Introductionmentioning

confidence: 99%

The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application

et al. 2020

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“…Microcosmic electron aspect coordination of the ligand with the silver ion drew 1–11 nm distinction in UV‐Vis absorption between balk and nanoparticles of compound 1 , and dafo ligand, that is, the peaks shift towards blue region as the particle size is reduced [21] . Vibronic interplay between close‐lying n→π* and π→π* states in aromatic carbonyl and many nitrogen containing heterocyclic compounds result in a red shift of π→π* state and a blue shift of n→π* state [24] . As can be seen in Figure 2C and Table 2, the luminescence intensity of both bulk and nanosized analog of compound 1 obtained in anhydrous ethanol showed a blue shift by 2–10 nm.…”

Section: Resultsmentioning

confidence: 83%

“…[21] Vibronic interplay between closelying n!π* and π!π* states in aromatic carbonyl and many nitrogen containing heterocyclic compounds result in a red shift of π!π* state and a blue shift of n!π* state. [24] As can be seen in Figure 2C and Table 2, the luminescence intensity of both bulk and nanosized analog of compound 1 obtained in anhydrous ethanol showed a blue shift by 2-10 nm. The optical bandgap energy using the absorption edge of the UV-Vis spectra (λ max ) of bulk analog and nanoparticles of compound 1 was gained according to the value of αhν = A (hν -Eg) n equation (Tauc Plot relation) in which α = 2.303 (coefficient) log (T/d) (d = thickness of the sample and T = transmission), hν = photon energy ( Figure 2D and Table 2).…”

Section: Introductionmentioning

confidence: 77%

Sonochemical Synthesis of Differently‐Sized Nanoparticles of a Silver(I) Compound: An Optical, Anticancer, and Thermal Activity Evaluation Study

et al. 2020

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Nano silver-based inorganic structure with the chemical formulation of [Ag(dafo) 2 (NO 3)] (1), dafo = 4,5-diazafluoren-9one, was synthesized using sonochemical method. Three different ultrasonic generator output powers of 30 W, 60 W, 90 W, each in two different reaction temperature ranges of 0-10°C and 25-35°C, were our sonochemical reaction conditions. After preparing compound 1 with differently-sized nanoparticles under the sonochemical reaction conditions, we conducted an evaluation study into the optical, anti-cancer, and thermal activities of the compound. High ultrasonic generator output power and low reaction temperature were the two prevailing conditions that affected the size and purity of the nanoparticles of compound 1. Based on our identifying methods, nanoparticles of 90 W at 0-10°C showed the lowest particles size among other nanoparticles. The best optical, anticancer, and thermal activities appertained to the nanoparticles. The nanoparticles were heated to 500°C in an electric furnace to synthesize phase-pure silver nanoparticles.

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“…As it was mentioned, the positions of maxima and shape of the absorption and emission spectra reflect the nature of the solute-solvent interactions [60][61][62]. For this purpose, the multiple linear regression analysis proposed by Catalán was applied for each of the compounds dissolved in all 14 solvents.…”

Section: Multiparametric Linear Regression Analysis (Mlr)mentioning

confidence: 99%

The Role of Hydrogen Bonding in Paracetamol–Solvent and Paracetamol–Hydrogel Matrix Interactions

et al. 2021

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The photophysical and photochemical properties of antipyretic drug – paracetamol (PAR) and its two analogs with different substituents (acetanilide (ACT) and N-ethylaniline (NEA)) in 14 solvents of different polarity were investigated by the use of steady–state spectroscopic technique and quantum–chemical calculations. As expected, the results show that the spectroscopic behavior of PAR, ACT, and NEA is highly dependent on the nature of the solute–solvent interactions (non-specific (dipole-dipole) and specific (hydrogen bonding)). To characterize these interactions, the multiparameter regression analysis proposed by Catalán was used. In order to obtain a deeper insight into the electronic and optical properties of the studied molecules, the difference of the dipole moments of a molecule in the ground and excited state were determined using the theory proposed by Lippert, Mataga, McRae, Bakhshiev, Bilot, and Kawski. Additionally, the influence of the solute polarizability on the determined dipole moments was discussed. The results of the solvatochromic studies were related to the observations of the release kinetics of PAR, ACT, and NEA from polyurethane hydrogels. The release kinetics was analyzed using the Korsmayer-Peppas and Hopfenberg models. Finally, the influence of the functional groups of the investigated compounds on the release time from the hydrogel matrix was analyzed.

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Solvent dependent spectroscopic properties of fingerprint reagent - 1,8-Diazafluoren-9-one

Cited by 10 publications

References 33 publications

The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application

The Luminescence of 1,8-Diazafluoren-9-One/Titanium Dioxide Composite Thin Films for Optical Application

Sonochemical Synthesis of Differently‐Sized Nanoparticles of a Silver(I) Compound: An Optical, Anticancer, and Thermal Activity Evaluation Study

The Role of Hydrogen Bonding in Paracetamol–Solvent and Paracetamol–Hydrogel Matrix Interactions

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