A facile fluorescent probe based on anthraldehyde for trace Fe(iii) ion determination in neutral aqueous solution

2015 ◽  
Vol 7 (1) ◽  
pp. 353-358 ◽  
Author(s):  
Dawei Huang ◽  
Zhuping Gao ◽  
Hao Yi ◽  
Yongxin Bing ◽  
Chenggang Niu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Fluorescent Probe ◽  
Neutral Aqueous Solution

A flexible fluorescent probe was synthesized for the determination of Fe(iii) in aqueous solution by conjugating 4-aminoacetophenone into 9-anthraldehyde.

Determination of phosphate anions with a near-infrared heptamethine cyanine dye in a neutral aqueous solution

2019 ◽  
Vol 11 (20) ◽  
pp. 2677-2682 ◽  
Author(s):  
Xia Gao ◽  
Jie Xu ◽  
Baoxian Ye ◽  
Weidong Wu ◽  
Hong Zheng
Keyword(s):  
Aqueous Solution ◽  
Near Infrared ◽  
Cyanine Dye ◽  
Neutral Aqueous Solution ◽  
Phosphate Anions ◽  
Novel Strategy

A novel strategy was developed for the detection of phosphate anions with anionic heptamethine cyanine and Tb3+ in the NIR region.

scholarly journals Binding Affinity and Driving Forces for the Interaction of Calixarene-Based Micellar Aggregates With Model Antibiotics in Neutral Aqueous Solution

2021 ◽  
Vol 8 ◽  
Author(s):  
Rossella Migliore ◽  
Giuseppe Granata ◽  
Andrea Rivoli ◽  
Grazia Maria Letizia Consoli ◽  
Carmelo Sgarlata
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectra ◽  
Drug Delivery Systems ◽  
Driving Forces ◽  
Titration Calorimetry ◽  
Self Assembling ◽  
Micellar Aggregates ◽  
Nanostructured Systems ◽  
Neutral Aqueous Solution

The search for novel surfactants or drug delivery systems able to improve the performance of old-generation antibiotics is a topic of great interest. Self-assembling amphiphilic calix[4]arene derivatives provide well-defined nanostructured systems that exhibit promising features for antibiotics delivery. In this work, we investigated the capability of two micellar polycationic calix[4]arene derivatives to recognize and host ofloxacin, chloramphenicol, or tetracycline in neutral aqueous solution. The formation of the nanoaggregates and the host–guest equilibria were examined by nano-isothermal titration calorimetry, dynamic light scattering, and mono- and bi-dimensional NMR. The thermodynamic characterization revealed that the calix[4]arene-based micellar aggregates are able to effectively entrap the model antibiotics and enabled the determination of both the species and the driving forces for the molecular recognition process. Indeed, the formation of the chloramphenicol–micelle adduct was found to be enthalpy driven, whereas entropy drives the formation of the adducts with both ofloxacin and tetracycline. NMR spectra corroborated ITC data about the positioning of the antibiotics in the calixarene nanoaggregates.

Lysozyme-stabilized bimetallic gold/silver nanoclusters as a turn-on fluorescent probe for determination of ascorbic acid and acid phosphatase

2017 ◽  
Vol 9 (47) ◽  
pp. 6713-6718 ◽  
Author(s):  
Shu Pang ◽  
Siyu Liu
Keyword(s):  
Aqueous Solution ◽  
Ascorbic Acid ◽  
Acid Phosphatase ◽  
Fluorescent Probe ◽  
Reducing Agent ◽  
Silver Nanoclusters ◽  
Turn On ◽  
Gold Silver

Bimetallic gold/silver nanoclusters were synthesized in aqueous solution with lysozyme as a stabilizing and reducing agent.

A low affinity nanoparticle based fluorescent ratiometric probe for the determination of Zn(ii) concentrations in living cells

2018 ◽  
Vol 42 (18) ◽  
pp. 14986-14993
Author(s):  
Graham R. C. Hamilton ◽  
Simanpreet Kaur ◽  
Sukanta Kamila ◽  
Bridgeen Callan ◽  
John F. Callan
Keyword(s):  
Aqueous Solution ◽  
Fluorescence Microscopy ◽  
Fluorescent Probe ◽  
Living Cells ◽  
Confocal Fluorescence Microscopy ◽  
Confocal Fluorescence ◽  
Ratiometric Probe

A ratiometric polymeric fluorescent probe for Zn(ii) was developed capable of measuring Zn(ii) concentrations in aqueous solution between 0 and 5 mM and was also capable of discriminating between resting and high Zn(ii) levels in living cells using confocal fluorescence microscopy.

Application of Silica Nanoparticles in the Determination of Herbicides in Environmental Water Samples Using Liquid Chromatography-Mass Spectroscopy

2020 ◽  
Vol 16 (5) ◽  
pp. 748-756
Author(s):  
Mir Waqas Alam ◽  
Tentu Nageswara Rao ◽  
Yarasani Prashanthi ◽  
Vourse Sridhar ◽  
Adil Alshoaibi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Liquid Chromatography ◽  
Silica Nanoparticles ◽  
Solid Phase ◽  
Silica Nanoparticle ◽  
Environmental Water ◽  
Phase Extraction ◽  
Functionalized Nanoparticles ◽  
Supporting Material

Background: Herbicides are very beneficial in the crop yield with the aid of controlling weeds within the agriculture, but several herbicides are chronic in soil. Objective: In this study, nanoparticles and the packages of synthesized novel silica nanoparticles were studied for the preconcentration of herbicides. Methods: These nanoparticles prepared by the Stöber mechanism were purified and functionalized. Nanoparticles thus prepared successfully were used as supporting material for the preconcentration of residues of herbicides in the water. Results: Preconcentration was achieved by preparing the silica-based solid-phase-extraction cartridges. Nanoparticles used for this purpose were within the range of 50-250 nm. An SPE cartridge was prepared by packing 200 mg of silica nanoparticle in the empty cartridge of diameter 5.5 cm and length 0.6 cm in between PTFE frits. Aqueous solutions of 0.1 μg/ml of herbicides were prepared separately, and 10 ml of the solution was passed through the cartridge at the rate of 0.2 ml/min. After passing 10 ml volume of the aqueous solution, residues adsorbed on the cartridge were eluted using 2 ml of acetonitrile. The eluate was injected to determine the herbicide residue adsorbed on the SPE cartridge. Conclusion: In the study, it was found that greater than 90% of the herbicide residues were trapped on silica nanoparticle-based SPE cartridge. An analytical method was developed for the simultaneous determination of these herbicides. The residues were quantified by LC-MS/MS with ESI mode.

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