Results in Chemistry最新文献_第3页

Ultraviolet-induced Photoreduction of rhodamine 6G textile effluent catalyzed by annealed metamorphic Nano-CuO

IF 2.5

Results in Chemistry Pub Date : 2025-01-22 DOI: 10.1016/j.rechem.2025.102064

Chan Kok Sheng, Nor Azlia Aziz

{"title":"Ultraviolet-induced Photoreduction of rhodamine 6G textile effluent catalyzed by annealed metamorphic Nano-CuO","authors":"Chan Kok Sheng, Nor Azlia Aziz","doi":"10.1016/j.rechem.2025.102064","DOIUrl":"10.1016/j.rechem.2025.102064","url":null,"abstract":"<div><div>In the present investigation, nano-CuO catalysts with diverse metamorphic nanostructures, such as sphere-like, sponge-like, and flower-like, were scrutinized through a dropwise precipitation approach followed by annealing at various temperatures and durations. XRD analysis indicates that nano-CuO possesses a monoclinic crystalline phase structure (<em>a</em> = 4.691 Å, <em>b</em> = 3.423 Å, <em>c</em> = 5.145 Å, γ = 90<sup>o</sup>). The UV–Vis absorbance spectra display an absorption band centered around 450 nm, which becomes stronger as the annealing temperature and duration rise. The FTIR spectra exhibit a prominent infrared band at 515 cm<sup>−1</sup> due to the stretching vibration of Cu<img>O bonds. Nano-CuO has initiated photoreduction of hazardous rhodamine 6G (R6G) textile effluent under ultraviolet (UV) irradiation. The reaction constant rates comply with pseudo-first-order kinetics, resulting in a 4-fold increase from 1.184 × 10<sup>−4</sup> min<sup>−1</sup> to 4.408 × 10<sup>−4</sup> min<sup>−1</sup>, with the highest R<sup>2</sup> value of ≈ 0.99. The sponge-like porous nanostructure (<100 nm) with reduced bandgap, increased pore dimensions, and improved crystallinity enhances photocatalytic degradation rate and efficiency. The photocatalytic efficiency of current nano-CuO can still be optimized by increasing the optical source power or combining it with other metal-based catalysts for prospective sustainable wastewater remediation.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102064"},"PeriodicalIF":2.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green synthesis of novel hexahydroquinolines and 6-amino-2-oxopyridine-3,5-dicarbonitriles incorporating sulfaguanidine via [3 + 3] atom combination

IF 2.5

Results in Chemistry Pub Date : 2025-01-22 DOI: 10.1016/j.rechem.2025.102065

Amr M. Abdelmoniem , Mostafa E. Salem , Mahmoud Hassan Mohamed Allam , Mortaga M. Abou-Krisha , Ibrahim O. Althobaiti , Said A.S. Ghozlan , Khaled E. Azmy , Ismail A. Abdelhamid

{"title":"Green synthesis of novel hexahydroquinolines and 6-amino-2-oxopyridine-3,5-dicarbonitriles incorporating sulfaguanidine via [3 + 3] atom combination","authors":"Amr M. Abdelmoniem , Mostafa E. Salem , Mahmoud Hassan Mohamed Allam , Mortaga M. Abou-Krisha , Ibrahim O. Althobaiti , Said A.S. Ghozlan , Khaled E. Azmy , Ismail A. Abdelhamid","doi":"10.1016/j.rechem.2025.102065","DOIUrl":"10.1016/j.rechem.2025.102065","url":null,"abstract":"<div><div>The synthesis of sulfa drugs has received extensive interest from researchers for their broad spectrum of biological activities. In this context, <em>N</em>-Carbamimidoyl-4-((5,5-dimethyl-3-oxocyclohex-1-en-1-yl)amino)benzenesulfonamide <strong>3</strong> was readily prepared and its Michael addition reactions towards activated cinnamonitriles were studied as a route to 4-(2-amino-3-cyano-4-aryl-tetrahydroquinolin-1-yl)-<em>N</em>-carbamimidoylbenzenesulfonamide derivatives <strong>8a-d</strong>. Moreover, <em>N</em>-(4-(<em>N</em>-carbamimidoylsulfamoyl)phenyl)-2-cyanoacetamide <strong>13</strong> was prepared and employed as a precursor for the synthesis of 4-(6-amino-3,5-dicyano-2-oxo-4-arylpyridin-1-yl)-<em>N</em>-carbamimidoylbenzenesulfonamide derivatives <strong>17a-e</strong>. Green synthesis of the targeted products was done in water in the presence of chitosan as a green catalyst and gave considerably higher yields as compared to conducting reactions in ethanol in presence of non-benign piperidine catalyst. The chemical constitution of all newly synthesized compounds was confirmed by the different spectral tools.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102065"},"PeriodicalIF":2.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research progress on PIEZO1 protein structure and activation mechanism by small-molecule agonists

IF 2.5

Results in Chemistry Pub Date : 2025-01-21 DOI: 10.1016/j.rechem.2025.102058

Danjiang Li , Yuanyuan Song , Yuan Zeng , Hua Hu, Wei Tian

引用次数: 0

Catalyst-free, one-pot four-component synthesis of aryl-linked hydroxy-naphthoquinone fused with imidazolone and 2-hydroxy-1,4-naphthoquinone moiety: naphtho[1,2-d]imidazolyl(aryl)methylnaphthalene-1,4-diones

IF 2.5

Results in Chemistry Pub Date : 2025-01-20 DOI: 10.1016/j.rechem.2025.102057

Mohaddeseh Ahmadusefi-Sarhadi, Hossein Mehrabi, Farzaneh Alizadeh-Bami

引用次数: 0

CuI-Graphene nanocomposite catalyzed synthesis of chromene derivatives under ultrasound irradiation and Evaluation of antioxidant activity

IF 2.5

Results in Chemistry Pub Date : 2025-01-20 DOI: 10.1016/j.rechem.2025.102060

Shahrzad Abdolmohammadi , Behrooz Mirza

引用次数: 0

Crystal structure, thermal behavior, electric and dielectric properties of a novel organic–inorganic hybrid compound based on iron (III) chloride

IF 2.5

Results in Chemistry Pub Date : 2025-01-18 DOI: 10.1016/j.rechem.2025.102053

Adel Mahroug , Hasna Ltaief , Mohamed Khitouni , Pavani Krishnapuram , Suresh Kumar , Manual Pedro Fernandes Graça , Mohamed Belhouchet

{"title":"Crystal structure, thermal behavior, electric and dielectric properties of a novel organic–inorganic hybrid compound based on iron (III) chloride","authors":"Adel Mahroug , Hasna Ltaief , Mohamed Khitouni , Pavani Krishnapuram , Suresh Kumar , Manual Pedro Fernandes Graça , Mohamed Belhouchet","doi":"10.1016/j.rechem.2025.102053","DOIUrl":"10.1016/j.rechem.2025.102053","url":null,"abstract":"<div><div>The current research work describes the preparation and characterizations of a new metal halide hybrid: (C<sub>12</sub>H<sub>14</sub>N<sub>2</sub>O<sub>2</sub>S)<sub>2</sub>(FeCl<sub>4</sub>)<sub>1.5</sub>(FeCl<sub>6</sub>)<sub>0.5</sub>Cl·3H<sub>2</sub>O Single crystals of the studied sample were grown by the solvent evaporation method. X ray diffraction results reveal that the new hybrid compound crystallizes in the orthorhombic system with Pnma space group. Raman and infrared spectroscopies confirm the presence of the functional groups of organic cations and the anionic entities. The thermal behavior was examined by TGA, DTA and DSC techniques. The UV–visible study of this new compound was also reported and discussed. The molecular arrangement can be described as alternating of organic cations and layers of anions linked together by hydrogen interactions. Hirshfeld surface analysis was carried out also to gain a quantitative overview of the non-covalent interactions. The results show that interactions dominating the structure are the H…Cl/Cl…H and O∙∙∙H/H∙∙∙O (about 67 %). The semiconductor character of this material was confirmed by AC conductivity measurements the values of which are of the order of 10<sup>−5</sup> Ω<sup>−1</sup>cm<sup>−1</sup>. The low activation energy at low temperatures (0.32 eV) indicates the electronic conduction of this material.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102053"},"PeriodicalIF":2.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of Victoria blue in water samples using ultrasound-assisted liquid-phase microextraction based on deep eutectic solvents: A comparative study of spectrophotometric and smartphone imaging techniques

IF 2.5

Results in Chemistry Pub Date : 2025-01-18 DOI: 10.1016/j.rechem.2025.102054

Zahra Khalifeh, Hamid Reza Rajabi, Ali Gorjizadeh Kohvade, Ardeshir Shokrollahi

{"title":"Determination of Victoria blue in water samples using ultrasound-assisted liquid-phase microextraction based on deep eutectic solvents: A comparative study of spectrophotometric and smartphone imaging techniques","authors":"Zahra Khalifeh, Hamid Reza Rajabi, Ali Gorjizadeh Kohvade, Ardeshir Shokrollahi","doi":"10.1016/j.rechem.2025.102054","DOIUrl":"10.1016/j.rechem.2025.102054","url":null,"abstract":"<div><div>In this research, the ultrasound-assisted liquid-phase microextraction (US-LPME) method based on the deep eutectic solvent (DES) was performed for preconcentration and extraction of Victoria Blue R (VBR) dye in water samples. In the US-LPME-DES method, a 1:1 ratio of choline chloride and oxalic acid (ChCl: OA) as the DES was optimized in the extraction process. The effect of analytical parameters on the extraction efficiency was studied and optimized using a response surface methodology based on experimental design. A central composite design (CCD) was employed to optimize the main parameters, including the initial pH of the aqueous dye solution, and the volume of DES and diluent. The quantitative determination of the extracted VBR was performed using both spectrophotometry and smartphone imaging (SPI) techniques. The method demonstrates excellent linearity (0.010–3.0 and 0.01–4.0 mg/L), high coefficient determination (R<sup>2</sup> = 0.9996 and 0.9985), and low detection limits (3.0 and 4.2 µg/L) using both spectrophotometry and SPI. In the selectivity tests of the method, the presence of various ions and dyes doesn’t show significant interference in the selective determination of VBR. The US-LPME-DES method was successfully applied to recover VBR from various water samples, too. The acceptable precision, accuracy, and efficiency confirmed the applicability of the present method for real sample analysis.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"14 ","pages":"Article 102054"},"PeriodicalIF":2.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the influence of copper precursors and solvents on catalyst performance in the hydrogenation of hydroxyacetone to 1,2-Propanediol

IF 2.5

Results in Chemistry Pub Date : 2025-01-01 DOI: 10.1016/j.rechem.2024.101914

Martina Cazzolaro, Jia Yang, De Chen

引用次数: 0

Theoretical study of the Sb-substitution effect on the optoelectronic properties of Cs2AgBiBr6 double perovskite

IF 2.5

Results in Chemistry Pub Date : 2025-01-01 DOI: 10.1016/j.rechem.2025.102025

Lhouceine Moulaoui , Abdelhafid Najim , Marouane Archi , Mohamed Al-Hattab , Omar Bajjou , Anass Bakour , Youssef Lachtioui , Khalid Rahmani , Bouzid Manaut

{"title":"Theoretical study of the Sb-substitution effect on the optoelectronic properties of Cs2AgBiBr6 double perovskite","authors":"Lhouceine Moulaoui , Abdelhafid Najim , Marouane Archi , Mohamed Al-Hattab , Omar Bajjou , Anass Bakour , Youssef Lachtioui , Khalid Rahmani , Bouzid Manaut","doi":"10.1016/j.rechem.2025.102025","DOIUrl":"10.1016/j.rechem.2025.102025","url":null,"abstract":"<div><div>We analyzed the structure of the double perovskite Cs<sub>2</sub>AgBiBr<sub>6</sub> utilizing Density Functional Theory (DFT), adding different doping concentrations of the Sb atom (Cs<sub>2</sub>AgBi<sub>1-x</sub> Sb<sub>x</sub>Br<sub>6</sub>, with x = 0.0625, 0.125, 0.1875). The investigation concentrated on the electronic structure of both pure and doped configurations, emphasizing the total density of states (TDOS) and the atomic orbital densities for each structure. The pure structure exhibits a maximum absorption coefficient of 7.65 × 10<sup>4</sup> cm<sup>−1</sup> at a wavelength of 285 nm. Furthermore, we assessed multiple optical properties including reflectivity (R), absorption coefficient (α), refractive index (n*), dielectric function (ε), optical conductivity (σ), and loss function L(ω). The findings demonstrate that Sb doping diminishes the bandgap energy and increases the absorption coefficient in the visible spectrum. The enhancements indicate that Sb-doped Cs<sub>2</sub>AgBiBr<sub>6</sub> hold significant potential for photovoltaic (PV) applications.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 102025"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antioxidant and cytotoxic activities of 2-oxo-1,2,3,4-tetrahydropyrimidines

IF 2.5

Results in Chemistry Pub Date : 2025-01-01 DOI: 10.1016/j.rechem.2024.101891

Sarosh Iqbal , Shahida Perveen , M. Iqbal Choudhary , Musarrat Jabeen , Shumaila Kiran , Faiza Qayyum , Khalid Mohammed Khan

{"title":"Antioxidant and cytotoxic activities of 2-oxo-1,2,3,4-tetrahydropyrimidines","authors":"Sarosh Iqbal , Shahida Perveen , M. Iqbal Choudhary , Musarrat Jabeen , Shumaila Kiran , Faiza Qayyum , Khalid Mohammed Khan","doi":"10.1016/j.rechem.2024.101891","DOIUrl":"10.1016/j.rechem.2024.101891","url":null,"abstract":"<div><div>Oxidative stress (OS) is an imbalance between ROS and antioxidants which is caused by increased synthesis and buildup of reactive oxygen species as well as a reduced ability to detoxify them. It contributes to the onset and progression of chronic inflammation, cancers, diabetes mellitus, atherosclerosis, Alzheimer’s disease, ocular disease, nephropathy, and premature aging. The molecules known as antioxidants contribute significantly to both the prevention and exaggeration of ailments. In the present study, heterocyclic ethyl esters of 2-oxo-1,2,3,4-tetrahydropyrimidines <strong>1</strong>–<strong>25</strong> were assessed for their antioxidant activity by employing two robust <em>in vitro</em> bioassays; superoxide anion, and DPPH radical scavenging assays. Cytotoxicity was also performed to evaluate the cytotoxicity on PC3 cells. Out of twenty-five, twenty-two compounds exhibited IC<sub>50</sub> values in the range of 3.32 ± 0.08 – 167 ± 0.7 µM in superoxide anion assay. Compound <strong>2</strong> (IC<sub>50</sub> = 3.32 ± 0.08 µM) remained the most potent as compared to quercetin dihydrate (IC<sub>50</sub> = 94.1 ± 1.1 µM). Whereas, compound <strong>10,</strong> possessing a catechol moiety was identified as an excellent dual radical scavenger. Hence, this study identified 2-oxo-1,2,3,4-tetrahydropyrimidines ethyl esters as non-cytotoxic, potent ROS scavengers that can be studied further to treat oxidative stress and related pathologies.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"13 ","pages":"Article 101891"},"PeriodicalIF":2.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0