The aqueous dependent sensing of hydrazine and phosphate anions using a bis-heteroleptic Ru(ii) complex with a phthalimide–anchored pyridine-triazole ligand

The article discusses the role of conjugated lactic acid/ lactate anion (LacH/Lac-) and dihydrogenphosphate anion/ hydrogenphosphate anion (H2PO4-/HPO42-) pairs in the formation of the buffer properties of tissue as a factor determining pH. The buffer properties of homogenates of the tissue of adenocarcinoma of the mammary gland and the adjacent tissue were quantitatively characterized by the buffer capacity which was determined by potentiometric titration. The concentrations of acid anions were determined spectrophotometrically. The material was biopsy specimens of mammary gland adenocarcinoma (T1-4, N0-1, M0) and adjacent tissue of 22 patients aged from 33 to 75 years. It was found that the buffer capacity of tumors is in 2.5 times higher than in normal tissue. It was established that for the tumor tissue, the buffer capacity of the LacH/Lac- system is in 3 times higher, and the buffer capacity of the H2PO4-/HPO42-system is in 2.5 times greater than for normal untransformed tissue. Concentrations of lactate anions (1,93 ± 0,50 vs 0,57 ± 0,22; p <0.001) and phosphate anions (2,54 ± 0,39 vs 0,70 ± 0,19; p <0,001) in homogenates of the tumor tissue were significantly higher in tumor tissue in comparison with the adjacent tissue. A strong correlation was found between the concentration of phosphate anions and the buffer capacity for tumor tissue (r = 0,857; p = 0,002) and for adjacent tissue (r = 0,917; p <0,001). The correlation between the concentration of lactate anions and the buffer capacity for tumor tissues can be estimated as average (r = 0,626; p = 0,053), while it is absent for the adjacent tissue (r = 0,494; p = 0,147). The results suggest that the acid-base properties of homogenates of mammary adenocarcinoma tissues are determined by two buffer systems: LacH/Lac- and H2PO4-/HPO42-, while the intracellular acid-base homeostasis of non-transformed tissues is mainly determined by the H2PO4-/HPO42- system.

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Phosphate Removal Using Polyethylenimine Functionalized Silica-Based Materials

Sustainability ◽

10.3390/su13031502 ◽

2021 ◽

Vol 13 (3) ◽

pp. 1502

Author(s):

Maria Xanthopoulou ◽

Dimitrios Giliopoulos ◽

Nikolaos Tzollas ◽

Konstantinos S. Triantafyllidis ◽

Margaritis Kostoglou ◽

...

Keyword(s):

Sorption Capacity ◽

Removal Rate ◽

Phosphate Concentration ◽

Phosphate Removal ◽

Equilibrium Studies ◽

Maximum Sorption Capacity ◽

Algae Blooms ◽

Maximum Sorption ◽

Phosphate Anions ◽

Adsorbent Dose

In water and wastewater, phosphate anions are considered critical contaminants because they cause algae blooms and eutrophication. The present work aims at studying the removal of phosphate anions from aqueous solutions using silica particles functionalized with polyethylenimine. The parameters affecting the adsorption process such as pH, initial concentration, adsorbent dose, and the presence of competitive anions, such as carbonate, nitrate, sulfate and chromate ions, were studied. Equilibrium studies were carried out to determine their sorption capacity and the rate of phosphate ions uptake. The adsorption isotherm data fitted well with the Langmuir and Sips model. The maximum sorption capacity was 41.1 mg/g at pH 5, which decreased slightly at pH 7. The efficiency of phosphate removal adsorption increased at lower pH values and by increasing the adsorbent dose. The maximum phosphate removal was 80% for pH 5 and decreased to 75% for pH 6, to 73% for pH 7 and to 70% for pH 8, for initial phosphate concentration at about 1 mg/L and for a dose of adsorbent 100 mg/L. The removal rate was increased with the increase of the adsorbent dose. For example, for initial phosphate concentration of 4 mg/L the removal rate increased from 40% to 80% by increasing the dose from 0.1 to 2.0 g/L at pH 7. The competitive anions adversely affected phosphate removal. Though they were also found to be removed to a certain extent. Their co-removal provided an adsorbent which might be very useful for treating waters with low-level multiple contaminant occurrence in natural or engineered aquatic systems.

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The Prepartion of Co@C3N4 Catalyst and Applications on Synthesis of Quinolines from 2-Aminobenzyl Alcohols with Ketones

New Journal of Chemistry ◽

10.1039/d0nj05767c ◽

2021 ◽

Author(s):

Fei Cao ◽

Anruo Mao ◽

Bobin Yang ◽

Chenyang Ge ◽

Dawei Wang

Keyword(s):

Energy Consumption ◽

Metal Complex ◽

Environmental Friendliness ◽

Triazole Ligand ◽

Earth Abundant

The unsymmetrical diphenylphosphino-pyridinyl-triazole ligand was synthesized and characterized through IR, NMR and MS and the corresponding earth-abundant metal complex (cobalt) was prepared. Considering energy consumption and environmental friendliness, it is...

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Synthesis of Silsesquioxanes with Substituted Triazole Ring Functionalities and Their Coordination Ability

Molecules ◽

10.3390/molecules26020439 ◽

2021 ◽

Vol 26 (2) ◽

pp. 439

Author(s):

Monika Rzonsowska ◽

Katarzyna Kozakiewicz ◽

Katarzyna Mituła ◽

Julia Duszczak ◽

Maciej Kubicki ◽

...

Keyword(s):

Ligand Binding ◽

Molecular Complex ◽

Coordination Compounds ◽

Triazole Ring ◽

Spectroscopic Characterization ◽

Process Conditions ◽

Double Decker ◽

Triazole Ligand ◽

Coordination Ability ◽

High Yields

A synthesis of a series of mono-T8 and difunctionalized double-decker silsesquioxanes bearing substituted triazole ring(s) has been reported within this work. The catalytic protocol for their formation is based on the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) process. Diverse alkynes were in the scope of our interest—i.e., aryl, hetaryl, alkyl, silyl, or germyl—and the latter was shown to be the first example of terminal germane alkyne which is reactive in the applied process’ conditions. From the pallet of 15 compounds, three of them with pyridine-triazole and thiophenyl-triazole moiety attached to T8 or DDSQ core were verified in terms of their coordinating properties towards selected transition metals, i.e., Pd(II), Pt(II), and Rh(I). The studies resulted in the formation of four SQs based coordination compounds that were obtained in high yields up to 93% and their thorough spectroscopic characterization is presented. To our knowledge, this is the first example of the DDSQ-based molecular complex possessing bidentate pyridine-triazole ligand binding two Pd(II) ions.

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Synthesis and Characterization of Bis‐1,2,3‐Triazole Ligand and its Corresponding Copper Complex for the Development of Electrochemical Affinity Biosensors.

Chemistry - A European Journal ◽

10.1002/chem.202100250 ◽

2021 ◽

Author(s):

Hussein Kanso ◽

Amani Ben Jrad ◽

Nicolas INGUIMBERT ◽

Wassim Rammal ◽

Christian Philouze ◽

...

Keyword(s):

Copper Complex ◽

Synthesis And Characterization ◽

Triazole Ligand ◽

Affinity Biosensors

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Drug delivery via anion exchange of salicylate decorating poly(meth)acrylates based on a pharmaceutical ionic liquid

New Journal of Chemistry ◽

10.1039/c7nj02667f ◽

2017 ◽

Vol 41 (21) ◽

pp. 12801-12807 ◽

Cited By ~ 8

Author(s):

Rafał Bielas ◽

Dariusz Łukowiec ◽

Dorota Neugebauer

Keyword(s):

Drug Delivery ◽

Ionic Liquid ◽

Anion Exchange ◽

Drug Carriers ◽

Phosphate Anions

Poly[trimethylammonium (meth)acrylate]s decorated by salicylate anions were investigated as drug carriers. Efficient exchange of drug was provided by phosphate anions contained in the medium within 4 h.

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