scholarly journals A Zn(II)-Organic Framework as a Fluorescent Probe for the Aqueous Phase Detection of Nitroaromatic Explosive and Cr(III) ion

2021 ◽  
Author(s):  
Samrah Kamal ◽  
Mohd Khalid ◽  
M. Shahnawaz Khan ◽  
M. Shahid ◽  
Musheer Ahmad
Keyword(s):  
Fluorescent Probe ◽  
Aqueous Phase ◽  
Aqueous Media ◽  
Theoretical Data ◽  
High Sensitivity ◽  
Fine Tuning ◽  
Hazardous Substances ◽  
Phase Detection ◽  
Fluorescence Sensing ◽  
Running Water

Abstract From the perspective of environment, civilian safety and human health it is utmost important to selectively and sensitively detect hazardous substances in the running water. In the last few decades, metal organic frameworks (MOFs) have been utilized for the detection of lethal substances in the aqueous phase using fluorescence method. Herein, a highly fluorescent MOF, Zn-MOF-1, namely, {[Zn2(pydc)2(DMF)]·2DMF}n, based on the ligand pyridine-2,5-dicarboxylic acid (H2pydc), was synthesized by employing solvothermal conditions. The Zn-MOF-1 was thoroughly characterized by crystallographic, PXRD, elemental, FTIR, and TG analysis. Single crystal data elucidated the exact structure of Zn-MOF-1. Due to its better emission spectra, the fluorescence sensing behavior of Zn-MOF-1 was checked in the aqueous medium. It was found that Zn-MOF-1 could detect Cr3+ with high sensitivity and selectivity and serve as an excellent fluorescent probe for TNP among other interfering nitroaromatic compounds in aqueous media. Furthermore, a plausible sensing mechanism has been demonstrated employing UV-Visible, fluorescence, and theoretical data. The observed Ksv values for TNP and Cr3+ are 2.1×108 M-1 and 1.46×107 M-1, respectively. Selective fluorescence quenching with high Ksv values and low detection limits validates the superior sensing performance shown by Zn-MOF-1 toward TNP and Cr3+. Thus, the fine-tuning of MOF for the detection of hazardous substances in wastewater is a challenging task and needs to address in future endeavors.

Pyrene appended thymine derivative for selective turn-on fluorescence sensing of uric acid in live cells

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 66774-66778 ◽  
Author(s):  
Prithidipa Sahoo ◽  
Himadri Sekhar Sarkar ◽  
Sujoy Das ◽  
Kalipada Maiti ◽  
Md Raihan Uddin ◽  
...  
Keyword(s):  
Uric Acid ◽  
Fluorescent Probe ◽  
High Sensitivity ◽  
Living Cells ◽  
Live Cells ◽  
Fluorescence Sensing ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
First Time

A new ‘turn-ON’ fluorescent probe, pyrene appended thymine acetamide (PTA), with high sensitivity and selectivity for the detection of uric acid (UA) was developed and first time imaging of uric acid in living cells in water was achieved.

scholarly journals A turn-off fluorescent probe for the detection of Cu2+ based on a tetraphenylethylene-functionalized salicylaldehyde Schiff-base

2020 ◽  
Vol 4 (5) ◽  
pp. 1500-1506 ◽  
Author(s):  
Hai-Fang Xie ◽  
Chang-Jin Yu ◽  
Ya-Li Huang ◽  
Hong Xu ◽  
Qi-Long Zhang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Limit Of Detection ◽  
Aqueous Media ◽  
High Sensitivity

A tetraphenylethylene-functionalized salicylaldehyde Schiff-base fluorescent probe (TPE-An-Py) with aggregation-induced enhanced emission (AIEE) characteristics exhibited high sensitivity towards copper(ii) ions in aqueous media with a “turn-off” fluorescence mechanism; limit of detection is 2.36 × 10−7 mol L−1.

11H-Pyrido[2,1-b]quinazolin-11-one - A reversible Turn-on/off Fluorescent Probe for Solution and Gas-phase Detection of Acids or Basic Amines

2021 ◽  
pp. 109536
Author(s):  
João Victor L. Silva Néto ◽  
Rodolfo I. Teixeira ◽  
Ramon B. da Silva ◽  
Nanci C. de Lucas ◽  
Simon J. Garden
Keyword(s):  
Gas Phase ◽  
Fluorescent Probe ◽  
Phase Detection ◽  
Turn On

scholarly journals A Biocompatible Colorimetric Triphenylamine- Dicyanovinyl Conjugated Fluorescent Probe for Selective and Sensitive Detection of Cyanide Ion in Aqueous Media and Living Cells

Sensors ◽  
2017 ◽  
Vol 17 (2) ◽  
pp. 405 ◽  
Author(s):  
Zi-Hua Zheng ◽  
Zhi-Ke Li ◽  
Lin-Jiang Song ◽  
Qi-Wei Wang ◽  
Qing-Fei Huang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Aqueous Media ◽  
Living Cells ◽  
Sensitive Detection ◽  
Cyanide Ion

Highly sensitive, stable, and precise detection of dopamine with carbon dots/tyrosinase hybrid as fluorescent probe

RSC Advances ◽  
2014 ◽  
Vol 4 (87) ◽  
pp. 46437-46443 ◽  
Author(s):  
Hao Li ◽  
Juan Liu ◽  
Manman Yang ◽  
Weiqian Kong ◽  
Hui Huang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Low Cost ◽  
High Sensitivity ◽  
Highly Sensitive

The carbon dots/tyrosinase hybrid as a low-cost fluorescent probe for the detection of dopamine exhibits high sensitivity, stability, and precision.

Simultaneous Quantification of Hg2+and MeHg+in Aqueous Media with a Single Fluorescent Probe by Multiplexing in the Time Domain

2014 ◽  
Vol 86 (23) ◽  
pp. 11919-11924 ◽  
Author(s):  
Ziqian Zhang ◽  
Baoyan Zhang ◽  
Xuhong Qian ◽  
Zhong Li ◽  
Zhiping Xu ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Time Domain ◽  
Aqueous Media ◽  
Simultaneous Quantification ◽  
The Time Domain

scholarly journals Water disinfection under the helium influence

2021 ◽  
Vol 4 (3(60)) ◽  
pp. 6-8
Author(s):  
Iryna Koval
Keyword(s):  
Natural Waters ◽  
Unit Volume ◽  
Aqueous Media ◽  
Reaction Medium ◽  
Research Process ◽  
Water Disinfection ◽  
Bacterial Cells ◽  
Treatment Technology ◽  
Running Water ◽  
Number Of Microorganisms

The object of research is the process of water disinfection at the influence of gas from bacteria of a particular genus with different amounts per unit volume of water. Due to the annual increase in the amount of pollutants in natural waters, new opportunities to improve microbiological indicators of water quality are being explored. There are many different ways to disinfect it, both physical and chemical. However, no single method has been found to purify aqueous media from microorganisms that would ensure their effective destruction. It is proposed to study the activity of specific microorganisms during the bubbling of inert gas through the aqueous medium. The microorganisms studied were rod-shaped sporogenic cells of Bacillus cereus bacteria type. The test gas was inert helium. The study used continuous gas bubbling throughout the process, which allowed to mix microbial water efficiently and prevent the formation of stagnant zones in the reaction medium. In particular, active gas mixing facilitates its access to each cell. The gas supply rate corresponded to 0.2 cm3/s, and its flow rate was 0.7 dm3 for one hour of bubbling through microbial water. The duration of the entire research process was 7200 s. The constant temperature of the microbial water (T=288±1 K) was maintained during the experiment by cooling the glass reactor with running water. An in-depth method of culturing bacterial cells was used. A decrease in the number of microorganisms was observed throughout the helium supply process, despite the different initial amounts in the water. The highest destruction degree of bacillus (77.06 %) was obtained at the lowest studied concentration in water (NM01=3.4·104 CFU/cm3). This is due to the fact that less microbial load provides better conditions for access of helium to the cell and their effective destruction. The proposed method of water purification allowed to achieve a sufficiently high degree of water disinfection from sporogenic rod-shaped bacteria after the action of helium alone. In particular, it has been experimentally proven that the efficiency of the water disinfection process depends on the concentration of microorganisms per unit volume of water. Due to the treatment of contaminated water with gas, it is possible to obtain high rates of its purification and the application of this method for practical purposes in water treatment technology.

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