Using infrared luminescence to study crystal violet lactone in carbonless papers

Stašková, Silvia; Reháková, Milena; Oravec, Michal; Jabconová, Andrea

doi:10.1007/s11696-021-01641-8

Cited by 3 publications

(5 citation statements)

References 17 publications

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“…Starting from the eighth 585-720 nm band-pass filter, the IRL of the samples PR5, PR7, PR9, CE1, and VN1 begin to decrease while the remaining other samples still possess a strong IRL, suggesting differences in the dye constituents. This shows the capability of using longer-wavelength excitation filters to discriminate ink samples [26].…”

Section: Video Spectral Comparator (Vsc) Studiesmentioning

confidence: 83%

“…These results agree with the optical characteristics of the ink stroke samples containing these dyes (subgroup II and subgroup III). This strongly suggests that crystal violet and triarylmethane dyes (D2 and D3) are responsible for the IRL characteristics observed in both Group II and Group III samples [26,38]. For samples of the subgroup IV which expressed no luminescence, IRL could be observed in the separated dyes, including crystal violet and D2.…”

Section: Photoluminescence (Pl)mentioning

confidence: 91%

“…The VSC is capable of measuring the PL intensities using different preset excitation optical filters [26,37]. We further studied the PL of writing ink strokes, reference crystal violet, and dyes on TLC plates (crystal violet, D1, D2, and D3) using the ten preset optical filters of the VSC for excitation.…”

Section: Photoluminescence (Pl)mentioning

confidence: 99%

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Alleviating Luminescence and Quenching toward Discrimination of Ballpoint Pen Inks Using Spectroscopy and Chromatography Techniques

et al. 2023

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The phenomenon of luminescence and quenching is widely applied in the forensic examination of various ink materials. Here, we introduce a hybrid spectroscopic and chromatography approach to gain insights into the underlying cause of infrared luminescence (IRL) in blue ballpoint (BP) pen inks. A total of thirty BP pen ink samples from the Egyptian market were employed in this study. Insights into the origin of luminescence and quenching in the studied samples were gained based on video spectral comparator (VSC), thin layer chromatography (TLC), ultraviolet–visible (UV–Vis) spectrophotometry, and photoluminescence (PL) spectroscopy. Results showed that some of the studied inks possessed IRL due to the presence of crystal violet and some other triaryl methane dyes. Nevertheless, some ink samples did not possess IRL, despite the presence of the dyes responsible for IRL in their matrix. Interestingly, the inclusion of phthalocyanine dye in those non-luminescent ink matrices resulted in luminescence quenching, mainly due to the overlap between the absorption of phthalocyanine dye and the luminescence of the triarylmethane dyes. The IRL behavior of the ink sample under the first illumination wave band (400–485 nm) exerted control over the IRL activity across subsequent illumination wavebands, and the most effective differentiation was achieved by utilizing the first and second preset filters in VSC. The results revealed the luminescent components present in studied inks and unraveled their distinct luminescence behavior present within the ink matrix. The combination of optical spectroscopy and chromatography techniques could provide a distinctive tool to reveal the luminescence and quenching behaviors of ink dyes for the successful forensic discrimination of several BP writing pens.

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Section: Video Spectral Comparator (Vsc) Studiesmentioning

confidence: 83%

Section: Photoluminescence (Pl)mentioning

confidence: 91%

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Alleviating Luminescence and Quenching toward Discrimination of Ballpoint Pen Inks Using Spectroscopy and Chromatography Techniques

et al. 2023

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“…Substrates, the medium upon which a document is created, cover a vast range, including but not limited to traditional paper, man-made substrates such as polymers and stone-papers, as well as mirrors, blackboards, and walls. Two textbooks [ 521 , 522 ], 13 articles [ [523] , [524] , [525] , [526] , [527] , [528] , [529] , [530] , [531] , [532] , [533] , [534] , [535] ], 12 conference presentations [ [536] , [537] , [538] , [539] , [540] , [541] , [542] , [543] , [544] , [545] , [546] , [547] ] had substrates as their subject in this period of review.…”

Section: Forensic Document Examinationmentioning

confidence: 99%

“…Staskova et al studied carbonless papers [ 535 ]. For this, the authors chose to study crystal violet lactone (CVL), the most commonly used color developer in carbonless papers.…”

Section: Forensic Document Examinationmentioning

confidence: 99%