scholarly journals Progress Towards Colorimetric and Fluorescent Detection of Carbonyl Sulfide

2020 ◽  
Author(s):  
Matthew M. Cerda ◽  
Julia M. Fehr ◽  
Tobias J. Sherbow ◽  
Michael Pluth
Keyword(s):  
Colorimetric Detection ◽  
Carbonyl Sulfide ◽  
Fluorescent Detection ◽  
Naked Eye ◽  
Colored Product

<p>We report here that a fluorescent benzobisimidazolium salt (TBBI) can be used for the fluorescent and colorimetric detection of carbonyl sulfide (COS) over related heterocumulenes including CO<sub>2</sub> and CS<sub>2</sub> in wet MeCN. The reaction between TBBI and COS in the presence of fluoride yields a highly fluorescent (l<sub>em</sub> = 354 nm) and colored product (l<sub>ex</sub> = 321 nm), that is readily observed by the naked eye. We view these results as a first step toward developing activity-based probes for COS detection.</p>

scholarly journals Progress Towards Colorimetric and Fluorescent Detection of Carbonyl Sulfide

2020 ◽  
Author(s):  
Matthew M. Cerda ◽  
Julia M. Fehr ◽  
Tobias J. Sherbow ◽  
Michael Pluth
Keyword(s):  
Colorimetric Detection ◽  
Carbonyl Sulfide ◽  
Fluorescent Detection ◽  
Naked Eye ◽  
Colored Product

<p>We report here that a fluorescent benzobisimidazolium salt (TBBI) can be used for the fluorescent and colorimetric detection of carbonyl sulfide (COS) over related heterocumulenes including CO<sub>2</sub> and CS<sub>2</sub> in wet MeCN. The reaction between TBBI and COS in the presence of fluoride yields a highly fluorescent (l<sub>em</sub> = 354 nm) and colored product (l<sub>ex</sub> = 321 nm), that is readily observed by the naked eye. We view these results as a first step toward developing activity-based probes for COS detection.</p>

scholarly journals Progress toward colorimetric and fluorescent detection of carbonyl sulfide

2020 ◽  
Vol 56 (67) ◽  
pp. 9644-9647
Author(s):  
Matthew M. Cerda ◽  
Julia M. Fehr ◽  
Tobias J. Sherbow ◽  
Michael D. Pluth
Keyword(s):  
Colorimetric Detection ◽  
Carbonyl Sulfide ◽  
Fluorescent Detection

We report here that a fluorescent benzobisimidazolium salt (TBBI) can be used for the fluorescent and colorimetric detection of carbonyl sulfide (COS) over related heterocumulenes including CO2 and CS2 in wet MeCN.

Naked-eye colorimetric detection of HCV RNA mediated by a 5′ UTR-targeted antisense oligonucleotide and plasmonic gold nanoparticles

The Analyst ◽  
2021 ◽  
Author(s):  
Almas Shamaila Mohammed ◽  
Aniket Balapure ◽  
Mahammad Nanne Khaja ◽  
Ramakrishnan Ganesan ◽  
Jayati Ray Dutta
Keyword(s):  
Gold Nanoparticles ◽  
Antisense Oligonucleotide ◽  
Early Stage ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Clinical Samples ◽  
Hcv Rna ◽  
Naked Eye

An Au NP based facile strategy for the rapid, early-stage, and sensitive detection of HCV RNA in clinical samples which avoids thiol tagging to the antisense oligonucleotide and expensive infrastructure is presented.

A guanidine based bis Schiff base chemosensor for colorimetric detection of Hg(II) and fluorescent detection of Zn(II) ions

2019 ◽  
Vol 486 ◽  
pp. 733-741 ◽  
Author(s):  
Kalyani Rout ◽  
Amit Kumar Manna ◽  
Meman Sahu ◽  
Goutam Kumar Patra
Keyword(s):  
Schiff Base ◽  
Colorimetric Detection ◽  
Fluorescent Detection

Colorimetric detection of class A soybean saponins by coupling DNAzyme with the gap ligase chain reaction

2020 ◽  
Vol 12 (26) ◽  
pp. 3361-3367
Author(s):  
Wenshuai Li ◽  
Guorui Wu ◽  
Min Wang ◽  
Aiqin Yue ◽  
Weijun Du ◽  
...  
Keyword(s):  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Chain Reaction ◽  
Ligase Chain Reaction ◽  
Naked Eye ◽  
Class A

We propose a colorimetric assay based on the coupling of gap ligase chain reaction (Gap-LCR) with DNAzyme to detect the target GmSg-1 genes of class A soybean saponins with the naked eye, without the involvement of expensive instruments.

scholarly journals A new detection tube to detect hydrogen cyanide in the air

2014 ◽  
Vol 20 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Vladimír Pitschmann ◽  
Zbyněk Kobliha ◽  
Ivana Tusarová ◽  
Lucie Bártová ◽  
David Vetchý ◽  
...  
Keyword(s):  
Composite Material ◽  
Detection Limit ◽  
Microcrystalline Cellulose ◽  
Hydrogen Cyanide ◽  
Sensitive Detection ◽  
Visual Evaluation ◽  
Naked Eye ◽  
Colored Product

A new simple and sensitive detection tube to detect hydrogen cyanide in the air has been developed. The detection tube is based on the reaction of hydrogen cyanide with 4-nitrobenzil to form a violet colored product. The reaction takes place on the carrier made of a composite material which was prepared by pelletization of a mixture of microcrystalline cellulose and MgO. The detection tube can detect hydrogen cyanide in the air in the range of concentrations 0.1-100 mg.m-3 based on visual evaluation (by naked eye) of the change of indication layer coloring and comparison with etalon. The detection limit is 0.05 mg.m-3. The detection tube is highly selective and sufficiently stable during storage.

scholarly journals A Subtle Change in Substituent Enabled Multi-Ways Fluoride Signals Including Paper-Strip Colorimetric Detection Using Urea Receptor Functionalized 1,1,4,4-Tetracyanobuta-1,3-Diene-Based Push-Pull Chromophore

2020 ◽  
Author(s):  
Vijayendran Gowri ◽  
Sachin Jalwal ◽  
Arif Hassan Dar ◽  
Arya Gopal ◽  
Azhagumuthu Muthukrishnan ◽  
...  
Keyword(s):  
Color Change ◽  
Intramolecular Charge Transfer ◽  
Colorimetric Detection ◽  
Paper Strip ◽  
Efficient System ◽  
Subtle Change ◽  
Biologically Relevant ◽  
Tissue Paper ◽  
Naked Eye ◽  
Homo Lumo

A simple color change detection by the naked-eye using untreated paper for a biologically relevant fluoride (F<sup>–</sup>) anion in water is a challenge. New non-planar push-pull chromophore involving intramolecular charge-transfer (ICT) from urea donor in 2,3-disubstituted-1,1,4,4-tetracyanobuta-1,3-diene (TCBD) turns out to be an efficient system for detecting F<sup>– </sup>ion giving various output signals. But, replacing phenyl (Ph) at <i>C</i><sub>3</sub>-position with 4-(dimethylamino)phenyl (DMA) led to the absence of colorimetric and fluorometric detections due to the masking and quenching, nature of strong ICT by the DMA. NMR and electrochemical studies revealed that the sensing mechanism is governed by H-bonding as well as the deprotonation of N–H attached with TCBD moiety which reduces the HOMO–LUMO gap and causes the dramatic color change. Coupled with excellent sensitivity (3 ppm) and specificity towards F<sup>–</sup>, a successful demonstration of cheap tissue paper-based visual strip-detection in aqueous is presented.

Sensitive, colorimetric enzyme amplification cascade for determination of alkaline phosphatase and application of the method to an immunoassay of thyrotropin

1991 ◽  
Vol 37 (9) ◽  
pp. 1513-1518 ◽  
Author(s):  
D M Obzansky ◽  
B R Rabin ◽  
D M Simons ◽  
S Y Tseng ◽  
D M Severino ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Acid Oxidase ◽  
Amino Acid Oxidase ◽  
Highly Sensitive ◽  
Wide Range ◽  
Colored Product ◽  
Enzyme Amplification ◽  
Amplification Cascade

Abstract A highly sensitive flavin adenine dinucleotide-3'-phosphate (FADP)-based enzyme amplification cascade has been developed for determining alkaline phosphatase (ALP; EC 3.1.3.1). The cascade detects ALP via the dephosphorylation of the novel substrate FADP to produce the cofactor FAD, which binds stoichiometrically to inactive apo D-amino acid oxidase (D-AAO). The resulting active holo D-AAO oxidizes D-proline to produce hydrogen peroxide, which is quantified by the horseradish peroxidase-mediated conversion of 3,5-dichloro-2-hydroxybenzenesulfonic acid and 4-aminoantipyrine to a colored product. The FADP-based enzyme amplification cascade has been used in a novel releasable linker immunoassay (RELIA) to quantify thyrotropin (TSH). In the assay, TSH is first captured onto antibody-coated chromium dioxide particles. After formation of an antibody-TSH sandwich with a dethiobiotinylated second antibody, the complex is reacted with a streptavidin-ALP conjugate. Biotin is then used to release the conjugate into solution, and ALP is quantified in an automated version of the FADP-based amplification cascade on the aca discrete clinical analyzer (Du Pont). The sensitivity of the colorimetric RELIA assay for TSH (less than 0.1 milli-int. unit/L) is comparable with that of fluorometric assays. This technology provides a way to adapt to the aca high-sensitivity immunoassays for a wide range of analytes via colorimetric detection.

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