scholarly journals A New pH-Dependent Macrocyclic Rhodamine B-Based Fluorescent Probe for Copper Detection in White Wine

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4514 ◽  
Author(s):  
Nour Doumani ◽  
Elias Bou-Maroun ◽  
Jacqueline Maalouly ◽  
Maya Tueni ◽  
Adrien Dubois ◽  
...  
Keyword(s):  
Rhodamine B ◽  
White Wine ◽  
Green Solvent ◽  
Acidic Media ◽  
One Pot ◽  
Acidic Conditions ◽  
Ph Conditions ◽  
Ph Dependent ◽  
Copper Detection ◽  
Color Emission

For efficiently measuring copper (II) ions in the acidic media of white wine, a new chemosensor based on rhodamine B coupled to a tetraazamacrocyclic ring (13aneN4CH2NH2) was designed and synthesized by a one-pot reaction using ethanol as a green solvent. The obtained chemosensor was characterized via NMR, UV and fluorescent spectra. It was marked with no color emission under neutral pH conditions, with a pink color emission under acidic conditions, and a magenta color emission under acidic conditions where copper (II) ions were present. The sensitivity towards copper (II) ions was tested and verified over Ca2+, Ag+, Zn2+, Mg2+, Co2+, Ni2+, Fe2+, Pb2+, Cd2+, Fe3+, and Mn2+, with a detection limit of 4.38 × 10−8 M in the fluorescence spectrum.

Carbon nanospheres with dual-color emission and their application in ratiometric pyrophosphate sensing

The Analyst ◽  
2019 ◽  
Vol 144 (2) ◽  
pp. 550-558 ◽  
Author(s):  
Zhong-Xia Wang ◽  
Yuan-Fei Gao ◽  
Xian-He Yu ◽  
Fen-Ying Kong ◽  
Wen-Juan Wang ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Carbon Nanospheres ◽  
One Pot ◽  
Aqueous Synthesis ◽  
Dual Color ◽  
Ph Dependent ◽  
The One ◽  
Solubility Equilibrium ◽  
Color Emission ◽  
Fluorescent Carbon

Herein, we employ pH-dependent solubility equilibrium to develop the one-pot aqueous synthesis of dual-color emission fluorescent carbon nanosphere (DFCSs) with novel physicochemical properties.

Polyoxometalate based ionic crystal: dual applications in selective colorimetric sensor for hydrated ZnCl2 and antimicrobial activity

2021 ◽  
Vol 45 (12) ◽  
pp. 5576-5588
Author(s):  
C. Sabarinathan ◽  
M. Karthikeyan ◽  
R. M. Murugappan ◽  
Savarimuthu Philip Anthony ◽  
Bhaskaran Shankar ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Ionic Crystal ◽  
Colorimetric Sensor ◽  
Icp Oes ◽  
One Pot ◽  
One Pot Synthesis ◽  
Acidic Conditions

One-pot synthesis of POM-salt ([Himi]4[SiMo12O40] (1)) was achieved by mixing silicomolybdic acid and imidazole in acidic conditions and characterized by FTIR, TGA, SEM, EDX, ICP-OES and XPS.

scholarly journals Synthesis and Antiproliferative Activity of Phosphorus Substituted 4-Cyanooxazolines, 2-Aminocyanooxazolines, 2-Iminocyanooxazolidines and 2-Aminocyanothiazolines by Rearrangement of Cyanoaziridines

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4265
Author(s):  
Victor Carramiñana ◽  
Ana M. Ochoa de Ochoa de Retana ◽  
Francisco Palacios ◽  
Jesús M. de los de los Santos
Keyword(s):  
Ring Opening ◽  
Human Lung ◽  
Ring Expansion ◽  
Moderate Activity ◽  
A549 Cell Line ◽  
One Pot ◽  
Acidic Conditions ◽  
Lung Adenocarcinoma A549 ◽  
High Yields

Several phosphorus-substituted N-acylated cyanoaziridines 2 and N-carbamoylated cyanoziridines 5 were prepared in good to high yields. N-Acylated cyanoaziridines 2 were used, after ring expansion, in an efficient synthesis of oxazoline derivative 3a and in a completely regio-controlled reaction in the presence of NaI. Conversely, N-carbamoyl cyanoaziridines 5 reacted with NaI to obtain a regioisomeric mixture of 2-aminocyanooxazolines 7. Mild acidic conditions can be used for the isomerization of N-thiocarbamoyl cyanoaziridine 6a into a 2-aminocyanothiazoline derivative 8a by using BF3·OEt2 as a Lewis acid. Likewise, a one pot reaction of NH-cyanoaziridines 1 with isocyanates obtained 2-iminocyanooxazolidines 9 regioselectively. This synthetic methodology involves the addition of isocyanates to starting cyanoaziridines to obtain N-carbamoyl cyanoaziridines 5, which after the ring opening, reacts with a second equivalent of isocyanate to give the final 2-imino cyanooxazolidines 9. In addition, the cytotoxic effect on the cell lines derived from human lung adenocarcinoma (A549) was also screened. 2-Iminooxazolidines 9 exhibited moderate activity against the A549 cell line in vitro. Furthermore, a selectivity towards cancer cells (A549) over non-malignant cells (MCR-5) was detected.

Synthesis of tetrapod CdS by one-pot Solvothermal Method for Photodegradation to rhodamine B

2021 ◽  
Vol 126 ◽  
pp. 105671
Author(s):  
Wenjin Yue ◽  
Zhen Wang ◽  
Jintao Gong ◽  
Ziyao Wang ◽  
Yuhang Dong
Keyword(s):  
Rhodamine B ◽  
Solvothermal Method ◽  
One Pot

scholarly journals Systematic exploration of the pH dependence of a peptide hydrogel

2019 ◽  
Vol 97 (6) ◽  
pp. 430-434 ◽  
Author(s):  
Natashya Falcone ◽  
Tsuimy Shao ◽  
Xiaoyi Sun ◽  
Heinz-Bernhard Kraatz
Keyword(s):  
Mechanical Strength ◽  
Narrow Range ◽  
Ph Dependence ◽  
Stimuli Responsive ◽  
Systematic Exploration ◽  
Ph Conditions ◽  
Ph Dependent ◽  
Functional Biomaterials ◽  
Peptide Hydrogel

Stimuli-responsive peptide gels are a growing class of functional biomaterials that are involved in many applications in research. Here, we present a novel di-peptide hydrogel from the compound Boc–Phe–Trp–OH in various buffer and pH conditions. We examine the effects of different stimuli, including temperature and pH, on the mechanical strength of the gels through frequency rheology studies. We found that this hydrogelator is highly pH dependent, only forming a gel in a narrow range of pH 6–7. This hydrogelator hold promise for the development of new stimuli-responsive biomaterials for specific applications that require this type of specific stimuli.

General properties and comparison of the corrosion inhibition efficiencies of the triazole derivatives for mild steel

2018 ◽  
Vol 36 (6) ◽  
pp. 507-545 ◽  
Author(s):  
Muhammad Faisal ◽  
Aamer Saeed ◽  
Danish Shahzad ◽  
Nadir Abbas ◽  
Fayaz Ali Larik ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Mechanisms Of Action ◽  
Effect Of Temperature ◽  
General Effect ◽  
Acidic Media ◽  
Triazole Derivatives ◽  
Concentration Time ◽  
Acidic Conditions

AbstractMild steel (MS) corrosion is a worldwide issue that greatly affects the industrial and natural environment. To extend the lifespan of appliances, the control of MS corrosion is necessary. To shield MS from corrosion, specifically from acidic conditions, one of the practical and finest approaches is the application of inhibitors. Triazole derivatives are eco-friendly corrosion inhibitors (CIs) having inconsequential toxicities, excellent inhibition efficiencies (IEs) against corrosion of MS, and extremely high cost-effectiveness. This critical review discusses the general effect of temperature, concentration, time after the application of CI, and type of acid on the IE of triazole derivatives. Further, the review provides an adequate amount of information about the features of excellent CIs; a summary of the reported properties of triazole-based inhibitors, CIs in industries, and current requirements of industries; and recommendations and implications for researchers to improve IE. Additionally, the review also illustrates the mechanisms of action and the IEs, which are evaluated from potentiodynamic polarization parameters, in various acidic media and concentrations of triazole inhibitors. By IE correlation with numerous concentrations and acidic conditions, this review is advantageous and helpful for synthetic chemists to expand the diversity and complexity of a class of triazole derivatives by synthesizing new triazole derivatives.

Base-Promoted Three-Component One-Pot Synthesis of 3- (Thiomethyl)indoles with Paraformaldehyde under Aqueous Conditions

Synlett ◽  
2018 ◽  
Vol 29 (20) ◽  
pp. 2693-2696 ◽  
Author(s):  
Fuhong Xiao ◽  
Guo-Jun Deng ◽  
Shanshan Yuan ◽  
Huawen Huang
Keyword(s):  
Carbon Source ◽  
Environmentally Friendly ◽  
Green Solvent ◽  
One Pot ◽  
One Pot Synthesis ◽  
Low Toxicity ◽  
Aqueous Conditions

An ethylenediamine-promoted three-component synthesis of 3-(thiomethyl)indoles from indoles, thiophenols, and paraformaldehyde has been developed. Water is used as the green solvent in a simple and environmentally friendly procedure. Stable and low-toxicity paraformaldehyde is used as a carbon source.

scholarly journals One-Pot Synthesis of Novel Dibenzoxanthenes, Diarylbutanes, and Calix[4]resorcinarenes via Consecutive Pyrrolidine Ring-Closure/Ring-Opening Reactions

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Andrey V. Smolobochkin ◽  
Almir S. Gazizov ◽  
Alexander R. Burilov ◽  
Michail A. Pudovik
Keyword(s):  
Ring Opening ◽  
Ring Closure ◽  
Acidic Media ◽  
Pyrrolidine Ring ◽  
One Pot ◽  
One Pot Synthesis ◽  
Ring Opening Reactions

Herein, we report the approach to the otherwise hardly accessible dibenzoxanthenes, diarylbutanes, and calix[4]resorcinarenes possessing urea moieties based on the reaction of N-(4,4-diethoxybutyl)ureas with electron-rich aromatics in strongly acidic media. Unlike the previously developed methods, the proposed approach benefits from one-pot procedure and allows to obtain the target compounds with much higher yields.

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