Chemical Papers最新文献

{"title":"Chiral-selective biocatalysis of (S)-1-BOC-3-hydroxypiperidine: developing analytical method for quantifying (R)-isomer impurities","authors":"Sanjay Kumar Sharma,&nbsp;Sayeeda Sultana","doi":"10.1007/s11696-025-04134-0","DOIUrl":"10.1007/s11696-025-04134-0","url":null,"abstract":"<div><p>(<i>S</i>)-N-Boc-3-hydroxypiperidine (S-NBHP) is a useful synthon for the synthesis of pharmaceutical intermediates including ibrutinib, the API of the newly approved drug Imbruvica, for the treatment of lymphoma. Reduction of N-Boc-piperidin-3-one to obtain optically pure <i>S</i>-NBHP through ketoreductase enzyme. The ketoreductase enzyme provided a high chiral selectivity. Preparation of (<i>S</i>)-1-Boc-3-hydroxypiperidine is an important stereoselective step in the synthesis of many anticancer drugs like tyrosine kinase inhibitors. Our study involved the Analytical Development approach by Reverse phase and Normal phase followed by quantitative analysis of (<i>S</i>)-1-Boc-3-hydroxypiperidine and (<i>R</i>)-1-Boc-3-hydroxypiperidine using Normal phase HPLC where R Isomer is by-product while manufacturing (<i>S</i>)-1-Boc-3-hydroxypiperidine. An efficient Isocratic Normal Phase-HPLC method using Chiralpak IC3 (250<b> × </b>4.6 mm, 3 µm) column was developed and qualified with respect to specificity, accuracy, linearity and precision. This methodology can be utilized to assess the quality of (<i>S</i>)-1-Boc-3-hydroxypiperidine sample by checking and quantifying the presence of (<i>R</i>)-1-Boc-3-hydroxypiperidine. The above method was found to be specific, accurate, and precise.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5409 - 5425"},"PeriodicalIF":2.5,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step electrodeposition of CuSe/CoSe2 heterostructure composite for high-performance asymmetric supercapacitor electrodes","authors":"Wannaiyi Liu,&nbsp;Si Rao,&nbsp;Zhuo You,&nbsp;Xiaoqin Min,&nbsp;Xiaoyun Lin","doi":"10.1007/s11696-025-04145-x","DOIUrl":"10.1007/s11696-025-04145-x","url":null,"abstract":"<div><p>In recent years, hybrid supercapacitors have attracted considerable attention owing to their remarkable energy density and power density. However, the performance of these devices is critically dependent on the rational design and optimization of electrode materials. Transition metal selenides are a type of phase change material with unique properties, structures, and electrical properties. In this manuscript, a heterogeneous material-CuSe/CoSe₂ (CCSe) was grown on the surface of Ni foam (NF) via one-step electrodeposition. Leveraging its intrinsic electric field, the CCSe electrode significantly enhances electron transfer kinetics while providing an enlarged effective electrode surface area, thereby achieving superior electrochemical performance. When a current density (<i>D</i>_<i>c</i>) is 1 A g⁻¹, the specific capacity (<i>C</i>_<i>s</i>) of the CCSe is up to 1464 C g⁻¹. Also, the CCSe electrode exhibits excellent cycling stability, retaining 82.2% of its initial <i>C</i>_<i>s</i> after 5000 cycles. Additionally, the assembled hybrid supercapacitors (SCs) constructed with the CCSe as the positive electrode and active carbon (AC) as the negative electrode also show good application potential. A high energy density (<i>E</i>_<i>d</i>) of 49.73 Wh kg⁻¹ can be obtained at a power density (<i>P</i>_<i>d</i>) of 800.0 W kg⁻¹.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5553 - 5563"},"PeriodicalIF":2.5,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chitosan-cross-linked tannic acid with hibiscus flower extract nanocomposite gel for ocular drug delivery against bacterial keratitis","authors":"Akshara Suresh,&nbsp;Jino R. Affrald,&nbsp;Daya Srinivasan,&nbsp;Shoba Narayan","doi":"10.1007/s11696-025-04132-2","DOIUrl":"10.1007/s11696-025-04132-2","url":null,"abstract":"<div><p>Bacterial keratitis is a serious ocular infection caused by microorganisms, which affects more significantly the anterior segment of the eye and, in turn, inflames the cornea. In the present investigation, we developed a biopolymer-based ocular nanocomposite gel formulation (CH@TA@HE) having hibiscus extract (HE) loaded in chitosan (CH), cross-linked with tannic acid (TA). Several characterization techniques were carried out to validate nanocomposite formulation. The absorption maxima and encapsulation efficiency of HE and TA were determined by UV–Vis spectroscopy, while particle size analysis was done by DLS. Stability was assessed by zeta potential measurements, whereas functional groups were analyzed by FTIR. In vitro and ex vivo studies were carried out to understand the efficacy of ocular nanocomposite gel formulation. Size of nanocomposite was 58.75 nm, measured using HR-TEM. SAED pattern confirmed nanocomposites amorphous nature. DPPH scavenging activity of formulation was found to be 76.93%, and the biocompatibility assays indicated the formulation safe for ocular application. Drug release studies demonstrated ocular tolerance, maximum penetration, and sustained delivery of the encapsulated bioactive components. Moreover, the formulation exhibited prominent growth inhibition and anti-biofilm activity against bacterial strains. Ex vivo histological studies on ocular tissues to understand pathological changes induced by bacteria and the therapeutic potential of nanocomposite was studied. Results indicate CH@TA@HE ocular nanocomposite gel formulation to be promising and potential candidate for management of bacterial keratitis. Further in vivo studies can provide an insight about the mechanism of protective effect of nanocomposite gel.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5379 - 5398"},"PeriodicalIF":2.5,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of chloroquine phosphate and cetirizine hydrochloride loaded liposomal formulations for dual drug delivery: stability, release kinetics, and pharmaceutical insights","authors":"Kenechukwu Keluo Onyechi,&nbsp;Ifeanyi Thaddeus Nzekwe,&nbsp;Chinenye Adaobi Igwegbe,&nbsp;Pius Chukwukelue Onyechi","doi":"10.1007/s11696-025-04072-x","DOIUrl":"10.1007/s11696-025-04072-x","url":null,"abstract":"<div><p>Liposomal formulations have emerged as promising avenues for drug delivery, offering improved therapeutic outcomes through precise control of release and targeted delivery. This study presents a novel approach to liposomal drug delivery by co-formulating chloroquine phosphate and cetirizine hydrochloride within a single liposomal system, a strategy not extensively explored in existing literature; our research explores the synergistic potential of dual-drug delivery. Comprehensive stability analysis using ultraviolet–visible absorption spectra, pH, viscosity, conductivity, particle size, and zeta potential revealed significant insights into formulation stability, with passive formulations showing superior characteristics. Advanced characterization techniques, including scanning electron microscopy, uncover detailed structural information and drug entrapment capabilities, highlighting both the initial advantages and long-term oxidative degradation challenges of active formulations. In vitro drug release from the liposomal formulation was assessed following the United States Pharmacopeia twenty-third (USP-XXIII) dissolution rate model, and formulation-dependent release kinetics were examined via zero-order, first-order, Higuchi, Hixson Crowell, and Korsmeyer–Peppas models. The results demonstrated the compatibility of both drugs within a single matrix. Passive formulations exhibited superior stability, while active formulations exhibited accelerated release kinetics. Drug release from the liposomal matrix followed the Hixson–Crowell drug release model (R² &gt; 0.9), confirming that the primary mechanism of drug release involves dissolution through changes in particle surface area and diameter, as well as matrix-controlled diffusion. This study contributed to the advancement of liposomal drug delivery systems, potentially enhancing treatment outcomes while optimization remains imperative for ensuring stability and therapeutic efficacy.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"4901 - 4923"},"PeriodicalIF":2.5,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ethylene glycol-assisted formaldehyde reduction of styrene-divinylbenzene loaded with Pt as an efficient catalyst for liquid-phase hydrogen isotopes catalytic exchange","authors":"Kun Fu,&nbsp;Xilongju Xu,&nbsp;Lei Zhu,&nbsp;Cailin Liu,&nbsp;Xianyan Ren,&nbsp;Haijun Yang,&nbsp;Shudong Lin","doi":"10.1007/s11696-025-04109-1","DOIUrl":"10.1007/s11696-025-04109-1","url":null,"abstract":"<div><p>Pt/SDB is one of the promising catalysts used in liquid-phase catalytic exchange (LPCE) reaction to treat the tritium-containing wastewater produced by nuclear power generation. Mesoporous polystyrene-divinylbenzene (SDB) was prepared by suspension polymerization. With ethylene glycol and formaldehyde as reducing agents, a mild reduction method was developed to prepare the SDB-supported platinum (Pt) active particles, which was given as Pt/SDB-EG-PA. The structural morphology and catalytic activity were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption desorption, and hydrogen-water catalytic exchange experiments. The results show that the Pt/SDB-EG-PA hydrophobic catalyst has outstanding performance and excellent catalytic activity: The average particle size of platinum nanoparticles is about 2.5 nm, the proportion of Pt⁰ components is 61.5%, and the catalytic exchange column efficiency reaches about 82.0% and remains stable within 160 min. This study provides a new strategy for the preparation of Pt/SDB hydrophobic catalysts by low temperature reduction.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5101 - 5108"},"PeriodicalIF":2.5,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing bioactive phytoconstituents to inhibit cathepsin K: a promising approach for therapeutic development against osteoporosis","authors":"Min Wang,&nbsp;Binghua Guo,&nbsp;Xiyuan Liu,&nbsp;Qian Cao,&nbsp;Jinlong He","doi":"10.1007/s11696-025-04128-y","DOIUrl":"10.1007/s11696-025-04128-y","url":null,"abstract":"<div><p>Osteoporosis is a chronic disease characterized by low mass bone and high susceptibility to fracture due to the disrupted equilibrium between osteoclast-mediated bone resorption and osteoblast-driven bone formation. Cathepsin K (CatK) is a cysteine protease predominantly expressed in osteoclasts and is essential for bone matrix degradation during resorption, thus making it a promising therapeutic target. In this study, we used an integrated bioinformatics approach to explore the possible use of bioactive phytoconstituents as CatK inhibitors. Virtual screening of phytoconstituents from the IMPPAT-2 database was performed as guided by physicochemical predictions and Pan-assay interference compounds (PAINS) filters. Docking analysis, pharmacokinetic profiling, and PASS predictions identified Digalogenin and Withametelin F as promising candidates with appreciable affinity and favorable interactions with CatK’s active site. Molecular dynamics (MD) simulations confirmed the conformational stability of Digalogenin and Withametelin F with the CatK binding site. Free energy calculations further supported their inhibitory potential towards CatK. Our results suggest that Digalogenin and Withametelin F may represent promising lead compounds for developing plant-derived therapeutics for osteoporosis. However, these findings require experimental validation to confirm binding efficacy, selectivity, and to exclude off-target effects.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5335 - 5352"},"PeriodicalIF":2.5,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring topological indices and Gibbs energy for terephthalic tetragonal network via curve-fitting model","authors":"Nasreen Ebrahim Almohanna,&nbsp;Muhammad Faisal Hanif,&nbsp;Khawlah Hamad Alhulwah,&nbsp;Muhammad Farhan Hanif,&nbsp;Saba Hanif,&nbsp;Muhammad Kamran Siddiqui","doi":"10.1007/s11696-025-04110-8","DOIUrl":"10.1007/s11696-025-04110-8","url":null,"abstract":"<div><p>The tetragonal structure of terephthalic acid involves a specific arrangement of molecules that enhances its physical and chemical properties. The molecular design, characterised by its planar geometry and hydrogen bonding capabilities, contributes to its significance in industrial applications, particularly in the synthesis of polymers like PET. <span>((TI_{4}Te_{3}Pb))</span> is a complex compound with a layered structure that presents unique electronic and thermal properties, making it a subject of interest in materials science, especially in the field of Optics and thermal power. <span>((TI_{4}Te_{3}Pb))</span> typically crystallises in a layered structure, often classified under the tetragonal crystal systems, depending on specific conditions and compositions. This article looks at the relationship between several indices and the Gibbs energy (<i>GE</i>) of a chemical structure. In this work, indices are computed in order to model the structural and electrical characteristics of <span>((TI_{4}Te_{3}Pb))</span>. We have calculated the different degree-based topological indices. We use Excel to create numerical tables, <i>Maple</i> software to compute the topological indices and maple software to create graphics. In MATLAB, curves fitting by Gibbs energy are accomplished through many techniques based on rationality, linearity, nonlinearity and polynomial. However, I have experience fitting curves between indices and Gibbs energy using the rational model.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5109 - 5124"},"PeriodicalIF":2.5,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustic micromixer design with novel sharp edges","authors":"Yechun Jin,&nbsp;Jie Li","doi":"10.1007/s11696-025-04131-3","DOIUrl":"10.1007/s11696-025-04131-3","url":null,"abstract":"<div><p>This study introduces a novel, straightforward acoustic micromixer featuring sharp edges, designed to enhance the mixing index (MI) for practical applications in chemical processes and biomedicine. The device incorporates multiple micropillars with semi-circular tips of varying radii, spaced at specific intervals. Utilizing COMSOL Multiphysics, a finite-element-based software, and the Generalized Lagrangian Mean (GLM) theory, the study assesses how background velocity and sharp edge geometry influence mixing quality. The findings show that the magnitude of MI grows as the tip radius, width, and height of the sharp edges increase; however, it decreases when the background velocity rises, due to the impact of the induced acoustic streaming's strength. For instance, MI values of 99.99%, 99.70%, 95.28%, and 83.71% correspond to inlet velocities of 500 μm/s, 700 μm/s, 900 μm/s, and 1100 μm/s, respectively. Additionally, there is an optimal spacing for the sharp edges that maximizes the MI. Due to its simple design, the device can be effectively optimized using machine learning algorithms for practical applications.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5367 - 5377"},"PeriodicalIF":2.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production, characterization and biochemical properties of melanin from crude salt-associated Hortaea sp. strain PMGTC8","authors":"Sanket Gaonkar,&nbsp;Vaibhavi Tamse","doi":"10.1007/s11696-025-04094-5","DOIUrl":"10.1007/s11696-025-04094-5","url":null,"abstract":"<div><p>Microbial melanin is a natural macromolecule offering multifaceted use in the environment and biotechnology. Considering this, the current study aimed to optimize physicochemical conditions for maximum melanin production by crude salt-associated <i>Hortaea</i> sp. strain PMGTC8 and to evaluate its biochemical properties. <i>Hortaea</i> cells grew in a 1.5 L fermenter with a maximum of 6.7 ± 1.01 g/L of biomass and 10.1 ± 1.58 mg/L melanin yield in the presence of glucose and glycerol. The acid-precipitated melanin was maximally soluble in alkali. UV–Vis analysis showed a prominent peak at 208 nm, while the fluorescence spectrum revealed peaks at 270, 350, 410, 475, 530 and 575 nm, indicating the conjugated nature of purified melanin. Carbon, hydrogen, nitrogen and sulfur analysis revealed 1,8-dihydroxy naphthalene (DHN) melanin, and the scanning electron micrograph showed spherical morphology. Infrared analyzed NH, CH, NH₂, CO, CH and CH₃-CH₃ groups in melanin. Further, melanin exhibited 64.72 ± 0.64% DPPH (1,1-diphenyl-2-picryl hydrazyl) radical scavenging activity at 100 µg/mL, 61.76 ± 5.26% antihemolytic at 50 µg/mL and 50.33 ± 2.89% chromium adsorption capacity for 5 ppm chromium concentration. Furthermore, melanin was maximally active against <i>Pseudomonas aeruginosa</i>. In addition, the prospects of melanin being used as a fluorescent probe for the detection of picric acid in fluorescence turn-off mode were justified. The study concluded that melanin from <i>Hortaea</i> sp. strain PMGTC8 could be explored from the view of biotechnological and environmental perspectives.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"4963 - 4980"},"PeriodicalIF":2.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“We Are Here!” ethanethiol in crude oil, natural gas, and fuels: removal by adsorption process, a mini review","authors":"Saja Mohsen Alardhi","doi":"10.1007/s11696-025-04129-x","DOIUrl":"10.1007/s11696-025-04129-x","url":null,"abstract":"<div><p>One of the important sulfur volatile organic molecules found in fossil fuels, especially natural gas, is ethyl mercaptan. Sulfur content should be kept as low as feasible in accordance with widely recognized international rules. One of the most promising methods for cleaning the environment and the economy is still the adsorption of pollutants or toxins. Although the affordability and simplicity of use make adsorption a very appealing and desired way of cleaning and separation, the choice of adsorbent determines or is crucial to the efficacy of adsorptive technology. For many years, a variety of industrial, environmental, and biological applications have used carbon and its modified forms, metal–organic frameworks, clays, zeolites, silica-based materials, and supported metal or metals as adsorbents. The major developments in various adsorbents for adsorptive desulfurization of sulfur compounds in fuels, natural gas, and crude oil are the main topic of this review.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"4883 - 4899"},"PeriodicalIF":2.5,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}