Fluorescence sensing of Ag+ ions by desulfurization of an acetylthiourea derivative of 2-(2-hydroxyphenyl)benzothiazole

Hwang, Keum Saem; Park, Ka Young; Kim, Da Bin; Chang, Suk‐Kyu

doi:10.1016/j.dyepig.2017.08.041

Cited by 36 publications

(8 citation statements)

References 43 publications

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“…Table 1 lists the compared LOD between the present method and previously reported methods of numerous fluorescent probes for Ag + detection. The LOD of the present work is comparable or superior to the previous reports [48,49,50,51,52,53,54,55]. In reference, the sensitivity requirement of Ag + recognition in drinking water is 460 nM (defined by U.S. Environmental Protection Agency), indicative of the validity of our SCNPNS probe in the practical application [56].…”

Section: Resultssupporting

confidence: 81%

Dual Functional S-Doped g-C3N4 Pinhole Porous Nanosheets for Selective Fluorescence Sensing of Ag+ and Visible-Light Photocatalysis of Dyes

2019

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This study explores the facile, template-free synthesis of S-doped g-C3N4 pinhole nanosheets (SCNPNS) with porous structure for fluorescence sensing of Ag+ ions and visible-light photocatalysis of dyes. As-synthesized SCNPNS samples were characterized by various analytical tools such as XRD, FT-IR, TEM, BET, XPS, and UV–vis spectroscopy. At optimal conditions, the detection linear range for Ag+ was found to be from 0 to 1000 nM, showing the limit of detection (LOD) of 57 nM. The SCNPNS exhibited highly sensitive and selective detection of Ag+ due to a significant fluorescence quenching via photo-induced electron transfer through Ag+–SCNPNS complex. Moreover, the SCNPNS exhibited 90% degradation for cationic methylene blue (MB) dye within 180 min under visible light. The enhanced photocatalytic activity of the SCNPNS was attributed to its negative zeta potential for electrostatic interaction with cationic dyes, and the pinhole porous structure can provide more active sites which can induce faster transport of the charge carrier over the surface. Our SCNPNS is proposed as an environmental safety tool due to several advantages, such as low cost, facile preparation, selective recognition of Ag+ ions, and efficient photocatalytic degradation of cationic dyes under visible light.

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Section: Resultssupporting

confidence: 81%

Dual Functional S-Doped g-C3N4 Pinhole Porous Nanosheets for Selective Fluorescence Sensing of Ag+ and Visible-Light Photocatalysis of Dyes

2019

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“…We identified in the literature an ESIPT fluorophore 4-amino-2-(benzo[d]thiazol-2-yl)phenol fluorophore (ABAH). [17][18][19][20][21] as an ideal scaffold for the development of an ER targeted ONOO À fluorescence probe ABAH-LW ( Fig. 1).…”

mentioning

confidence: 99%

ESIPT-based ratiometric fluorescence probe for the intracellular imaging of peroxynitrite

et al. 2018

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In this work, we set out to develop an endoplasmic reticulum (ER) directed ESIPT-based ONOO ratiometric fluorescent probe (ABAH-LW). ABAH-LW was synthesized in four steps and found to have a high sensitivity and selectivity towards the detection of ONOO. ABAH-LW was able to detect low concentrations of ONOO (limit of detection = 21.4 nM) within seconds producing a ratiometric change in fluorescence intensity. ABAH-LW further demonstrated the ability to ratiometrically image endogenous and exogenous ONOO in HeLa cells. Moreover, co-localization experiments were carried out using commercially available ER-Tracker Red, Lyso-Tracker Red and Mito-Tracker-Red, which were co-stained with ABAH-LW in HeLa cells. For ER-Tracker Red, Pearson's correlation co-efficient of 0.93 was determined and 3D surface plot analysis illustrated a large overlap between ABAH-LW and ER-Tracker Red using both red and blue channels. In addition some co-localisation with Mito-Tracker Red and ABAH-LW was observed (0.73).

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“…The probe shows fluorescent quenching (turn-off) of about 60-fold when 7 µM Ag + is added in to an ethanol–phosphate-buffered saline (EtOH/PBS) (1:9) mixture. The detection limit (0.03 µM) is low, which matches the allowable level of Ag + in drinking water by WHO [22]. QCy showed high selectivity to Ag + over other metal cations.…”

Section: Introductionmentioning

confidence: 54%

A Sensitive Near-Infrared Fluorescent Probe for Detecting Heavy Metal Ag+ in Water Samples

Zhang

Yao

et al. 2019

Sensors

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Silver is a common catalyst in industrial production, and the frequent use of Ag+ can cause water pollution. Thus, the detection of Ag+ in the environment is necessary to determine the level of pollution from silver. In this work, we designed a new, highly selective near-infrared (NIR) fluorescent probe QCy to detect Ag+. The probe exhibits “turn-off” fluorescence quenching responses at 760 nm towards Ag+ over other relevant cations, with outstanding sensitivity and a low detection limit (0.03 µM), which is considerably lower than the standard of the World Health Organization (WHO) for drinking water (0.9 µM). Meanwhile, QCy showed a very good linearity at a low concentration of Ag+ with a ‘naked eye’ visible color change of solution from blue to red. The probe has been applied successfully for the detection of Ag+ in real water samples.

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Fluorescence sensing of Ag+ ions by desulfurization of an acetylthiourea derivative of 2-(2-hydroxyphenyl)benzothiazole

Cited by 36 publications

References 43 publications

Dual Functional S-Doped g-C3N4 Pinhole Porous Nanosheets for Selective Fluorescence Sensing of Ag+ and Visible-Light Photocatalysis of Dyes

Dual Functional S-Doped g-C3N4 Pinhole Porous Nanosheets for Selective Fluorescence Sensing of Ag+ and Visible-Light Photocatalysis of Dyes

ESIPT-based ratiometric fluorescence probe for the intracellular imaging of peroxynitrite

A Sensitive Near-Infrared Fluorescent Probe for Detecting Heavy Metal Ag+ in Water Samples

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