scholarly journals Synthesis of Symmetrical Acetophenone Azine Derivatives as Colorimetric and Fluorescent Cyanide Chemosensors

2021 ◽  
Vol 21 (6) ◽  
pp. 1337
Author(s):  
Nur Masyittah Irmi ◽  
Bambang Purwono ◽  
Chairil Anwar
Keyword(s):  
Limit Of Detection ◽  
Test Paper ◽  
Cyanide Anion ◽  
Colorimetric Measurement ◽  
Naked Eye ◽  
Fluorescent Method ◽  
Acetophenone Derivatives ◽  
Toxic Anion ◽  
Condensation Of Acetophenone ◽  
Naked Eye Detection

Cyanide is a highly toxic anion and poison to the environment. Therefore, fast, effective, and efficient analysis methods to detect cyanide are needed. Herein, symmetrical chemosensor of 2’-hydroxy acetophenone azine (1) and 2’,4’-dihydroxy acetophenone azine (2) has been synthesized tested as colorimetric and fluorescent cyanide chemosensor. The azines were produced from the condensation of acetophenone derivatives with hydrazine hydrate in ethanol under reflux or ultrasonic irradiation methods. Colorimetric and fluorescent chemosensor tests showed selectivity to acetate and cyanide anions in DMSO. The limit of detection (LOD) for colorimetric measurement of cyanide anion was 9.68×10–4 M for compound (1) and 9.63×10–5 M for compound (2), while the fluorescent method showed 15.90×10–4 M for compound (1) and 8.95×10–5 M for compound (2), respectively. In addition, test paper-strips containing sensor 2 indicated noticeable results for 'naked eye' detection of cyanide in an aqueous medium.

Naked-Eye Detection of Mercury Ions from Morphological Transition of Silver Nanocubes: Tuning Sensitivity Using Co-Staining Agent

2021 ◽  
Vol 21 (4) ◽  
pp. 2123-2131
Author(s):  
Alagan Jeevika ◽  
Dhesingh Ravi Shankaran
Keyword(s):  
Color Change ◽  
Limit Of Detection ◽  
Low Cost ◽  
Toxic Metal ◽  
Face Centered Cubic ◽  
Mercury Ions ◽  
Eye Detection ◽  
Naked Eye ◽  
Silver Nanocubes ◽  
Naked Eye Detection

A simple, low-cost and highly selective nanosensor was developed for naked-eye detection of mercury ions (Hg2+) based on Eosin/silver nanocubes (Eosin/AgNCbs). Silver nanocubes (AgNCbs) were synthesized by polyol assisted chemical method. HR-TEM result shows the formed AgNCbs have a mean diameter of 84±0.005 nM (diagonally measured) and edge length of 55±0.01 nM. XRD result confirms that the AgNCbs are single crystalline in nature with a phase structure of face centered cubic (FCC) of silver. On interaction of Hg2+, AgNCbs exhibits a color change from gray to black up to 16.67 μM of Hg2+ owed to the formation of solid like bimetallic complex of Ag/Hg amalgam. The selectivity of AgNCbs was evaluated with several other toxic metal ions including, Mg2+, Ba2+, Ca4+, Pb2+, Cd4+, Zn2+, Co2+, Cu2+, K+ and Ni2+ and found good selectivity towards Hg2+. The sensitivity of the AgNCbs sensor system was tuned by using Eosin as a co-staining agent. The Eosin/AgNCbs showed a limit of detection of 60±0.050 nM with the color change from orange to purple. The results suggests that the Eosin/AgNCbs nanosensor exhibits good selectivity, sensitivity, repeatability and rapid response, which could be explored for real-time detection of Hg2+ in environmental and biological samples.

Naked-eye detection of fluoride ion in water: a remarkably selective easy-to-prepare test paper

2006 ◽  
pp. 624 ◽  
Author(s):  
Zhi-hua Lin ◽  
Sheng-ju Ou ◽  
Chun-ying Duan ◽  
Bing-guang Zhang ◽  
Zhi-ping Bai
Keyword(s):  
Fluoride Ion ◽  
Test Paper ◽  
Eye Detection ◽  
Naked Eye ◽  
Naked Eye Detection

“Naked-eye” detection of CN− from aqueous phase and other extracellular matrices: an experimental and theoretical approach mimicking the logic gate concept

2019 ◽  
Vol 43 (46) ◽  
pp. 18098-18109 ◽  
Author(s):  
Sourav Bej ◽  
Riyanka Das ◽  
Harish Hirani ◽  
Somnath Ghosh ◽  
Priyabrata Banerjee
Keyword(s):  
Aqueous Phase ◽  
Theoretical Approach ◽  
Logic Gate ◽  
Cost Effective ◽  
Extracellular Matrices ◽  
Real Field ◽  
Eye Detection ◽  
Naked Eye ◽  
Toxic Anion ◽  
Naked Eye Detection

Selective and real-field detection of a toxic anion (CN−) from aqueous and extracellular matrices by a cost-effective chemosensor.

A Simple Method for Colorimetric and Naked-Eye Detection of Mercury in Fish Products

2019 ◽  
Vol 970 ◽  
pp. 219-226
Author(s):  
Nadezhda V. Saranchina ◽  
Anna A. Dudkina ◽  
Maria M. Gavrilenko ◽  
Nataliya A. Gavrilenko
Keyword(s):  
Limit Of Detection ◽  
The Body ◽  
Mercury Ions ◽  
Simple Method ◽  
Fish Products ◽  
Naked Eye ◽  
Mercury In Fish ◽  
Copper Diethyldithiocarbamate ◽  
Naked Eye Detection

A new colorimetric optode has been developed for preconcentration and visual determination of mercury ions in fish products. This optode is based on the color reaction of copper diethyldithiocarbamate with Hg2+ in the body of polymethylmethacrylate matrix. The optode exhibited sensitivity through the change of color from brown to colorless, which could be easily detected by naked-eye or spectrophotometric method. The influence of acidity, contact time and interference of foreign metal ions has been studied. The optode revealed good linearity in the range of 20-360 μg·L-1, with a limit of detection of 8 μg·L-1 Hg2+ at pH 5.2 and response time of 10 min.

A highly selective and dual responsive test paper sensor of Hg2+/Cr3+ for naked eye detection in neutral water

RSC Advances ◽  
2012 ◽  
Vol 2 (9) ◽  
pp. 3714 ◽  
Author(s):  
Priyadip Das ◽  
Amrita Ghosh ◽  
Hitesh Bhatt ◽  
Amitava Das
Keyword(s):  
Test Paper ◽  
Eye Detection ◽  
Naked Eye ◽  
Dual Responsive ◽  
Neutral Water ◽  
Paper Sensor ◽  
Naked Eye Detection

Naked-Eye Detection of Hg(II) Ions by Visible Light-Induced Polymerization Initiated by a Hg(II)-Selective Photoredox Catalyst

2021 ◽  
Author(s):  
Hyungwook Kim ◽  
Young Jae Jung ◽  
Jungkyu K. Lee
Keyword(s):  
Visible Light ◽  
Signal Amplification ◽  
Eye Detection ◽  
Naked Eye ◽  
Turn On ◽  
Novel Strategy ◽  
Amplification Strategy ◽  
Naked Eye Detection

We developed a novel strategy for signal amplification strategy using a visible light-induced photopolymerization, initiated by a selective turn-on photoredox catalyst. As photoredox catalysts, fluorescein derivatives are able to initiate...

Naked eye detection and measurement of fluoride concentration in groundwater using novel synthesized receptor

2021 ◽  
Vol 328 ◽  
pp. 112776
Author(s):  
Yogendra Singh Solanki ◽  
Priya Yadav ◽  
Madhu Agarwal ◽  
Ragini Gupta ◽  
Sanjeev Gupta ◽  
...  
Keyword(s):  
Fluoride Concentration ◽  
Eye Detection ◽  
Naked Eye ◽  
Naked Eye Detection
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