Fluorescent photoimaging with polymers having protected quinizarin dye precursors by a dry process based on chemical amplification

Ahn, Kwang‐Duk; Yoo, Kyoung Wook; Soh, Jin-Ho; Kang, Jahyo

doi:10.1016/j.reactfunctpolym.2008.10.012

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…The results in absorption and emission obtained here by enzymatic hydrolysis of quinizarin diesters are similar to the acid hydrolysis used by Ahn et al to form quinizarin from tert -butyloxycarbonyloxy protected dye [ 30 , 31 ].…”

Section: Resultssupporting

confidence: 83%

Monitoring the Activity of Immobilized Lipase with Quinizarin Diester Fluoro-Chromogenic Probe

et al. 2017

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Quinizarin diester is used as a fluoro-chromogenic substrate of the activity of lipase supported in poly(methylmetacrylate) beads (CALB, Novozym® 435) dispersed in organic solvents. The monoester and diester of quinizarin are both non-fluorescent species contrasting with the enzymatic product quinizarin that shows optical absorption in the visible region and strong fluorescence signal. The enzymatic conversion is accomplished by spectroscopic measurements and it follows a sigmoid curve from which the mean reaction time of the enzymatic process can be determined. This parameter indicates the enzyme activity of the immobilized lipase. Its dependency with the amount of lipase allowed the determination of the ratio of the catalytic rate and the Michaelis constant (kc/Km) and the experimental value found was (1.0 ± 0.1) × 10−2 mg−1/min in the case of quinizarin diacetate.

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Section: Resultssupporting

confidence: 83%

Monitoring the Activity of Immobilized Lipase with Quinizarin Diester Fluoro-Chromogenic Probe

et al. 2017

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“…The new compound that results may have a conjugated structure. As a result, it can fluoresce. − At the same time, the newly formed compound may be unable to fluoresce. − However, it fluoresces when reacted with a specific substance. − Chae and colleagues created a compound, and an “oxime-carbamate group” exists in the compound. This compound can decompose under UV light to give the primary amine group.…”

Section: Introductionmentioning

confidence: 99%

Magnetic–Fluorescent Responsive Janus Photonic Crystal Beads for Self-Destructive Anti-counterfeiting

et al. 2022

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In this study, we fabricate magnetic–fluorescent responsive Janus photonic crystal beads (JPCBs) based on poly(styrene-methyl methacrylate-acrylic acid) (p(St-MMA-AA)) colloidal nanoparticles, Fe3O4, and photobase generators used for self-destructive anti-counterfeiting. We synthesize two kinds of photobase generators that can react with fluorescamine to produce various fluorescence colors. A microfluidic method is used to obtain the Janus photonic crystal beads. The upper portions of the JPCBs are photonic crystals assembled with colloidal spheres, whereas the Fe3O4 settles down to the bottom of the JPCBs due to its higher density. Photobase generators are distributed in photonic crystal gaps. Because of the magnetism of the Fe3O4, the JPCBs could be flipped from one side to the other in the presence of a magnet. After being exposed to UVC light and fluorescamine, the JPCBs can fluoresce under UVA light. Then, we create Janus microbeads arrays with various types of beads and apply them to the visitor card, bracelet, and box label to provide irreversible and self-destructive anti-counterfeiting. The JPCBs are capable of being encoded and angle-independently displayed, which are crucial to their applications in anti-counterfeiting, information coding, and array display.

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“…Natural and synthetic anthraquinones have attracted the interest of researches due to their significant biological activities such as antitumour (Chang, 2004;Ge et al, 1997, Hug et al 2004, anti-inflammatory (Yadav et al, 2010), antimalarial (Sitti et al, 1999, Yadav et al, 2010Osman et al, 2010), antimicrobial (Xiang et al, 2008, Yadav et al, 2010, antifungal (Rath et al, 1995) antileukemic Lee, 1984, Ismail et al, 1997), antiviral and anti-HIV properties (Schinazi et al, 1990, Anderson et al, 1991, Barnad et al, 1992, Alves et al, 2004. Anthraquinone and its derivatives are also used as antioxidants (Yen et L., 2000), dyes (Sokolyuk et al, 1993;Bechtold et al, 1999;Guo et al, 2007;Ahn et al, 2009) or in photoimaging (Ahn et al, 2009) along with various other applications (Atun et al, 2019;Penthala et al, 2019;Ramotowska et al, 2019;Shahid et al, 2019;Sharma et al, 2012;Tikhomirov et al, 2019;.…”

Section: Introductionmentioning

confidence: 99%

Facile route for the synthesis and characterization of new naphtho[2,3-f]quinoxaline-dione, trione and anthra-dione derivatives

Int¹

2019

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In the present study, addition of nitroso group at position 1 of 2-aminoanthraquinone (1) to yield 2-amino-1-nitroanthraquinone (2) was carried out by the reaction of compound (1) with sodium nitrite in water. Compound (2) was used as starting material to produce many new naphtho[2,3-f] quinoxaline-dione, trione, naphtho-pyrazole quinoxaline-dione, anthra-triazine-dione, naphtho-thiazole quinoxaline-dione and anthrabenzo-triazepine-dione derivatives by elimination of one molecule of water as an initial reaction step. The reacting moieties were nitroso and amino function groups to yield a series of compounds. The structures of the products were determined by elemental mass, IR and 1H NMR analysis and the adopted method is efficient to prepare a series of compounds and could possibly be used for the synthesis of new compounds.

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Fluorescent photoimaging with polymers having protected quinizarin dye precursors by a dry process based on chemical amplification

Cited by 9 publications

References 35 publications

Monitoring the Activity of Immobilized Lipase with Quinizarin Diester Fluoro-Chromogenic Probe

Monitoring the Activity of Immobilized Lipase with Quinizarin Diester Fluoro-Chromogenic Probe

Magnetic–Fluorescent Responsive Janus Photonic Crystal Beads for Self-Destructive Anti-counterfeiting

Facile route for the synthesis and characterization of new naphtho[2,3-f]quinoxaline-dione, trione and anthra-dione derivatives

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