Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

The coordination ability of QSA− ligand towards potassium cations was investigated. Potassium complex of quercetin-5’-sulfonate of the general formula [KQSA(H2O)2]n was obtained. The [KQSA(H2</s...

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Autores principales:	Urszula Maciołek, Ewaryst Mendyk, Małgorzata Kosińska-Pezda, Daniel M. Kamiński, Anna E. Kozioł
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	quercetin-5′-sulfonic acid polymeric potassium complexes acetone solvate DMSO solvate crystal structure thermal analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
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spelling	oai:doaj.org-article:0ff3715ec581413abbb2efadd8bda1952021-11-25T18:13:40ZPotassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties10.3390/ma142267981996-1944https://doaj.org/article/0ff3715ec581413abbb2efadd8bda1952021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6798https://doaj.org/toc/1996-1944The coordination ability of QSA<sup>−</sup> ligand towards potassium cations was investigated. Potassium complex of quercetin-5’-sulfonate of the general formula [KQSA(H<sub>2</sub>O)<sub>2</sub>]<sub>n</sub> was obtained. The [KQSA(H<sub>2</sub>O)<sub>2</sub>] (<b>1</b>) was a starting compound for solvothermal syntheses of acetone (<b>2</b>) and dimethylsulfoxide (<b>3</b>) complexes. For the crystalline complexes <b>1</b>–<b>3</b>, crystals morphology was analyzed, IR and Raman spectra were registered, as well as thermal analysis for 1 was performed. Moreover, for <b>1</b> and <b>3,</b> molecular structures were established. The potassium cations are coordinated by eight oxygen atoms (KO<sub>8</sub>) of a different chemical nature; coordinating groups are sulfonic, hydroxyl, and carbonyl of the QSA<sup>−</sup> anion, and neutral molecules—water (<b>1</b>) or DMSO (<b>3</b>). The detailed thermal studies of <b>1</b> confirmed that water molecules were strongly bonded in the complex structure. Moreover, it was stated that decomposition processes depended on the atmosphere used above 260 °C. The TG–FTIR–MS technique allowed the identification of gaseous products evolving during oxidative decomposition and pyrolysis of the analyzed compound: water vapor, carbon dioxide, sulfur dioxide, carbonyl sulfide, and carbon monoxide. The solubility studies showed that <b>1</b> is less soluble in ethanol than quercetin dihydrate in ethanol, acetone, and DMSO. The exception was aqueous solution, in which the complex exhibited significantly enhanced solubility compared to quercetin. Moreover, the great solubility of <b>1</b> in DMSO explained the ease of ligand exchange (water for DMSO) in [KQSA(H<sub>2</sub>O)<sub>2</sub>].Urszula MaciołekEwaryst MendykMałgorzata Kosińska-PezdaDaniel M. KamińskiAnna E. KoziołMDPI AGarticlequercetin-5′-sulfonic acidpolymeric potassium complexesacetone solvateDMSO solvatecrystal structurethermal analysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6798, p 6798 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	quercetin-5′-sulfonic acid polymeric potassium complexes acetone solvate DMSO solvate crystal structure thermal analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	quercetin-5′-sulfonic acid polymeric potassium complexes acetone solvate DMSO solvate crystal structure thermal analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Urszula Maciołek Ewaryst Mendyk Małgorzata Kosińska-Pezda Daniel M. Kamiński Anna E. Kozioł Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
description	The coordination ability of QSA<sup>−</sup> ligand towards potassium cations was investigated. Potassium complex of quercetin-5’-sulfonate of the general formula [KQSA(H<sub>2</sub>O)<sub>2</sub>]<sub>n</sub> was obtained. The [KQSA(H<sub>2</sub>O)<sub>2</sub>] (<b>1</b>) was a starting compound for solvothermal syntheses of acetone (<b>2</b>) and dimethylsulfoxide (<b>3</b>) complexes. For the crystalline complexes <b>1</b>–<b>3</b>, crystals morphology was analyzed, IR and Raman spectra were registered, as well as thermal analysis for 1 was performed. Moreover, for <b>1</b> and <b>3,</b> molecular structures were established. The potassium cations are coordinated by eight oxygen atoms (KO<sub>8</sub>) of a different chemical nature; coordinating groups are sulfonic, hydroxyl, and carbonyl of the QSA<sup>−</sup> anion, and neutral molecules—water (<b>1</b>) or DMSO (<b>3</b>). The detailed thermal studies of <b>1</b> confirmed that water molecules were strongly bonded in the complex structure. Moreover, it was stated that decomposition processes depended on the atmosphere used above 260 °C. The TG–FTIR–MS technique allowed the identification of gaseous products evolving during oxidative decomposition and pyrolysis of the analyzed compound: water vapor, carbon dioxide, sulfur dioxide, carbonyl sulfide, and carbon monoxide. The solubility studies showed that <b>1</b> is less soluble in ethanol than quercetin dihydrate in ethanol, acetone, and DMSO. The exception was aqueous solution, in which the complex exhibited significantly enhanced solubility compared to quercetin. Moreover, the great solubility of <b>1</b> in DMSO explained the ease of ligand exchange (water for DMSO) in [KQSA(H<sub>2</sub>O)<sub>2</sub>].
format	article
author	Urszula Maciołek Ewaryst Mendyk Małgorzata Kosińska-Pezda Daniel M. Kamiński Anna E. Kozioł
author_facet	Urszula Maciołek Ewaryst Mendyk Małgorzata Kosińska-Pezda Daniel M. Kamiński Anna E. Kozioł
author_sort	Urszula Maciołek
title	Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
title_short	Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
title_full	Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
title_fullStr	Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
title_full_unstemmed	Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties
title_sort	potassium complexes of quercetin-5′-sulfonic acid and neutral o-donor ligands: synthesis, crystal structure, thermal analysis, spectroscopic characterization and physicochemical properties
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0ff3715ec581413abbb2efadd8bda195
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Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

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