Fluorescent Sensing of a Nerve Agent Simulant with Dual Emission over Wide pH Range in Aqueous Solution

2017 ◽  
Vol 23 (32) ◽  
pp. 7785-7790 ◽  
Author(s):  
Youngsam Kim ◽  
Yoon Jeong Jang ◽  
Sandip V. Mulay ◽  
Thuy-Tien T. Nguyen ◽  
David G. Churchill
Keyword(s):  
Aqueous Solution ◽  
Nerve Agent ◽  
Dual Emission ◽  
Fluorescent Sensing ◽  
Wide Ph Range ◽  
Ph Range

Influence of pH on the Absorption and Fluorescence Spectra of 6,7-Dihydroxycoumarin in Aqueous Solution

1982 ◽  
Vol 37 (3) ◽  
pp. 262-265 ◽  
Author(s):  
Jerzy Grzywacz ◽  
Stanisława Taszner
Keyword(s):  
Aqueous Solution ◽  
Fluorescence Spectra ◽  
Singlet State ◽  
Ph Value ◽  
Emission Spectra ◽  
Excited Singlet ◽  
Acid Base ◽  
Wide Ph Range ◽  
Ph Range ◽  
Influence Of Ph

Abstract Absorption and emission spectra of 6,7-dihydroxycoumarin [6,7-DHC] in aqueous solution over a wide pH range are reported. The absorption spectra proved to be strongly sensitive to the pH-value of the solution, whereas the emission spectra change in this range only insignificantly. An interpretation is attempted on the basis of the differences of the acid-base properties of the 6,7-DHC molecule in its ground and excited singlet state. For this purpose the pKa's and pKax's values have been calculated. It has been stated that in the excited state the phototautomer form is very unlikely.

Green synthesized silver nanoparticles for selective colorimetric sensing of Hg2+ in aqueous solution at wide pH range

The Analyst ◽  
2013 ◽  
Vol 138 (15) ◽  
pp. 4370 ◽  
Author(s):  
Selvan Sukanya Ravi ◽  
Lawrence Rene Christena ◽  
Nagarajan SaiSubramanian ◽  
Savarimuthu Philip Anthony
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Colorimetric Sensing ◽  
Wide Ph Range ◽  
Ph Range ◽  
Green Synthesized Silver Nanoparticles

Amidoxime-functionalized hydrothermal carbon materials for uranium removal from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102462-102471 ◽  
Author(s):  
Zhibin Zhang ◽  
Zhimin Dong ◽  
Ying Dai ◽  
Saijin Xiao ◽  
Xiaohong Cao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
High Selectivity ◽  
Carbon Materials ◽  
Uranium Removal ◽  
Wide Ph Range ◽  
Ph Range

Amidoxime-functionalized hydrothermal carbon (AO-HTC) has been synthesized and applied to adsorb U(vi) from aqueous solutions, exhibiting a high selectivity above 60% for a wide pH range from 1.0 to 5.0.

scholarly journals The mechanism of retention of vanadium oxo-species at the “titanium oxide / aqueous solution" interface

2013 ◽  
Vol 12 (3) ◽  
pp. 231-238
Keyword(s):  
Aqueous Solution ◽  
Titanium Oxide ◽  
Solution Concentration ◽  
Surface Groups ◽  
Compact Layer ◽  
Titration Curves ◽  
Solution Interface ◽  
Titania Surface ◽  
Wide Ph Range ◽  
Ph Range

The mechanism of retention of vanadium oxo-species at the “titanium oxide/aqueous solution” interface was investigated over a wide pH range (4-9) and V(V) solution concentration (10-5-2×10-2 M) by combining equilibrium deposition experiments, potentiometric titrations, microelectrophoresis and “proton–ion” titration curves. It was inferred that the adsorbed V(V) oxo-species are retained inside the compact layer of the interface through hydrogen/coordinative bonds forming very probably innersphere complexes with the titania surface groups.

scholarly journals The interaction of morin and morin-5’-sulfonic acid with lead(II): Study of the 1:1 complex formation process in aqueous solution

2019 ◽  
Vol 42 (1) ◽  
pp. 67-72
Author(s):  
Maxim A. Lutoshkin ◽  
Boris N. Kuznetsov ◽  
Vladimir A. Levdanskiy
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Sulfonic Acid ◽  
Computational Models ◽  
Experimental Parameters ◽  
Wide Ph Range ◽  
Ph Range ◽  
Aqueous Complexation ◽  
Complex Formation Process

Abstract This article focuses on the aqueous complexation between two flavonoids (morin and morinsulfonate) and Pb2+ at constant ionic strength I=0.5 M (NaClO4). The determination of stability constants of ML complexes were performed at wide pH range. Two obtained constants are 14.8 ± 0.1 and 15.2 ± 0.1 logarithmic units for morin and morin-5’-sulfonic acid, respectively. For estimating the thermodynamic stability of the complexes studied, the Def2-SV(P)/DFT/PBE0/SMD method has been used. Different computational models were tested to describe the data obtained. The theoretical values of logK reproduce the experimental parameters within reasonable errors.

Development of an AIE based fluorescent probe for the detection of nitrate anions in aqueous solution over a wide pH range

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 6997-7001 ◽  
Author(s):  
Shiyan Chen ◽  
Xin-Long Ni
Keyword(s):  
Aqueous Solution ◽  
Fluorescent Probe ◽  
Living Cells ◽  
Selective Detection ◽  
Ionic Interaction ◽  
Turn On ◽  
Wide Ph Range ◽  
New Type ◽  
Ph Range ◽  
Nitrate Anions

A new type of AIE-based turn-on fluorescent probe 1 was reported to highly selective detection of NO3− anion in aqueous solution and living cells by virtue of ionic interaction.

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