Chemical Papers最新文献

{"title":"Synthesis and characterization of a magnetically recoverable molybdenum catalyst for CO2 fixation and glucose oxidation","authors":"Hamid Zeighami Nejad,&nbsp;Mehrji Khosravan,&nbsp;Fatemeh Khajoee Nejad,&nbsp;Hojatollah Khabazzadeh","doi":"10.1007/s11696-025-04170-w","DOIUrl":"10.1007/s11696-025-04170-w","url":null,"abstract":"<div><p>This study presents a novel heterogeneous catalyst for the chemical fixation of carbon dioxide (CO₂) into cyclic carbonates. A molybdenum (Mo) complex was successfully immobilized on silica-coated magnetic nanoparticles (Fe₃O₄@SiO₂@APTMS), resulting in a highly efficient and reusable catalyst. Characterization techniques such as FT-IR, XRD, SEM, TGA, VSM, and EDS confirmed the successful synthesis and immobilization of the catalyst. The catalytic performance of Fe₃O₄@SiO₂@APTMSMoO₂L was evaluated in the coupling reaction between CO₂ and epichlorohydrin. Under optimized conditions (60 °C, 1 bar CO₂, 10 mg catalyst, 6 h), the catalyst achieved a 96% conversion rate with excellent selectivity for the desired cyclic carbonate product. Notably, the catalyst exhibited remarkable stability and reusability, maintaining high catalytic activity for at least five consecutive cycles. Moreover, the complex demonstrated remarkably effective catalytic performance in the oxidation of glucose. This was achieved under benign conditions, specifically in an aqueous environment at ambient temperature, utilizing oxygen as the oxidizing agent. Notably, the conversion efficiency reached an impressive 95%.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6025 - 6040"},"PeriodicalIF":2.5,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918425","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":"Effect of cooling rate on metastable zone width of glycerol derived from sunflower oil and compressed oil","authors":"Wan Nur Athirah Mazli,&nbsp;Wan Nur Aisyah Wan Osman,&nbsp;Shafirah Samsuri,&nbsp;Usman Bello,&nbsp;Fabienne Espitalier","doi":"10.1007/s11696-025-04192-4","DOIUrl":"10.1007/s11696-025-04192-4","url":null,"abstract":"<div><p>Glycerol is a commonly utilized compound in numerous industrial and consumer products, wherein crystallization is crucial in identifying product quality. The metastable zone width (MZW) is an important parameter in crystallization and phase transformation, needed for process control. The MZW is affected by factors such as cooling rate, which directly influences crystallization behaviour and the performance of the final product. Despite its significance, research on the MZW of glycerol is limited to emphasize the necessity for additional study. Metastable zone temperature (MZT) and induction time of glycerol from sunflower oil and compressed oil were discovered throughout the studies. Simultaneously, gravity settling was used to separate glycerol from the biodiesel obtained via the transesterification process. To determine the MZW, Crystal 16 was used for the analysis. The most stable MZT for glycerol from sunflower oil was attained at 10 ℃/h, while the optimal induction time was recorded at a rate of 15 ℃/h. Meanwhile, the most stable MZT for compressed oil was obtained at a rate of 10 ℃/h and the optimal induction time was observed at a rate of 20 ℃/h. In conclusion, the study of the MZW of glycerol is important for optimizing the crystallization process and enhancing process control and product quality for industrial applications.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6303 - 6313"},"PeriodicalIF":2.5,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918420","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":"Nutrient nanohybrids based on sodium alginate and carboxymethyl cellulose provide enhanced slow release of magnesium, zinc and copper","authors":"R. K. Maduwanthi,&nbsp;I. Munaweera,&nbsp;W. P. T. D. Perera","doi":"10.1007/s11696-025-04185-3","DOIUrl":"10.1007/s11696-025-04185-3","url":null,"abstract":"<div><p>The concurrent use of slow release and nanotechnology principles in agriculture is paving the way for innovative approaches that can effectively address global food scarcity. This study focuses on the development of a nanohybrid formulation that efficiently releases important nutrients, including magnesium, zinc and copper over an extended time period. The nanomaterial feature was achieved by including the Mg, Zn and Cu nutrients in their nano-oxide states. Nanoparticles (NPs) were incorporated into a matrix of sodium alginate and carboxymethyl cellulose to provide the slow-release characteristic. The nano-oxides were subjected to sonication with a composite and then cross-linked with Ca²⁺ ions to produce the nanohybrids. The oxides were analyzed using powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and scanning electron microscopy (SEM). Furthermore, the creation of Ca²⁺ cross-links was established, which assisted in the analysis using FTIR spectroscopy. Flame atomic absorption spectroscopy (FAAS) was employed to examine the nutrient composition and the gradual release characteristics of the nutrients. The elements Mg, Zn and Cu exhibited cumulative release percentages of 22.73%, 11.23% and 3.03%, respectively, for periods of 6, 11 and 6 days in water at pH of 7.2. The release kinetics analysis revealed that Mg, Zn and Cu follow diffusion-driven release, aligning with the Higuchi and Korsmeyer–Peppas models. The mung bean plant trial demonstrated a significant increase in yield compared to plants treated just with NPK, as confirmed by statistical analysis using ANOVA. </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 9","pages":"6227 - 6245"},"PeriodicalIF":2.5,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918307","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":"Phytoremediation and therapeutic potential of Mazari palm (Nannorrhops ritchiana) in heavy metal-contaminated environment","authors":"Zafar Ali,&nbsp;Farah Naz Talpur,&nbsp;Hassan Imran Afridi,&nbsp;Atif Hussain Mangi,&nbsp;Nazir Ahmed Brohi,&nbsp;Habibullah Abbasi","doi":"10.1007/s11696-025-04155-9","DOIUrl":"10.1007/s11696-025-04155-9","url":null,"abstract":"<div><p>Heavy metal pollution poses a significant environmental threat, and understanding plant responses to such stress is crucial for advancing phytoremediation efforts. Mazari palm (<i>Nannorrhop ritchiana</i>) trees naturally grow in heavy metal-rich areas of Makran Balochistan, Pakistan, particularly in the Rocky Mountains range. This study investigated the exposure to heavy metals, including arsenic (As), copper (Cu), zinc (Zn), nickel (Ni), cobalt (Co), mercury (Hg), lead (Pb), chromium (Cr), cadmium (Cd), and Mangnese (Mn) and its effects on the trees’ production of beneficial phytochemicals, their potential for phytoremediation and therapeutic application. Pollution load index and normalized difference vegetation index as indicators of environmental quality, revealed a concerning trend of increasing pollution and potential vegetation stress within the study area. Soil and leaf samples were collected in triplicate from six sites with varying levels of heavy metal-contaminated environment.The heavy metals in leaf samples were identified by using FESEM imaging, XRD spectra and concentrations in the soil and palm leaf samples were then determined by ICP-OES and EDX. The FTIR result of leaf powder revealed the presence of functional groups such as alcohol, phenol, alkanes, ketones, aldehydes, carboxylic acids, and esters, associated with the identified phytochemicals in Mazari palm tree leaves across various sites (S-I to S-VI). Phytochemical screening identified a range of secondary metabolites including flavonoids, phenolic, and tannins (abundant in all samples), alkaloids and terpenoids (present in varying degrees), and cardiac glycosides, steroids, coumarin, and saponin (detected with site-specific variations). The analysis revealed varying levels of phenolic contents (656.2–1412.9 µg GAE/g) and flavonoids (558.12–1225.10 µgQE/g) in the leaf extract, exhibiting strong antioxidant properties. The results of antioxidant activity test using DPPH method, showed strong activity with IC50(µg/mL) values ranged from 279.11 to 560.50 µg/mL, across the six investigated sites.The trees demonstrated the ability to accumulate heavy metals, with a bio-concentration factor (BCF) exceeding 1 for several metals. These results show that Mazari palm trees can be highly efficient tools for phytoremediation, for specific areas contaminated with As, Cu, Zn, Ni, Co, Hg, Pb, Cr, Cd, and Mn.. This study contributes to a deeper understanding of the phytoremediation, phytochemical potential, and therapeutic benefits of Mazari palm, highlighting its ability to not only tolerate but also accumulate heavy metals for bioactive compound production.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5813 - 5829"},"PeriodicalIF":2.5,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918306","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":"The impact of contact angle on droplet breakup dynamics in a T-junction microchannel","authors":"Zunlong Jin,&nbsp;Zhenghao Liu,&nbsp;Yong Li,&nbsp;Fangfang Wang,&nbsp;Changliang Wang","doi":"10.1007/s11696-025-04193-3","DOIUrl":"10.1007/s11696-025-04193-3","url":null,"abstract":"<div><p>The contact angle is a critical factor influencing the droplet breakup process in microchannel systems. Through numerical simulations, this study investigates how contact angle and liquid slug length affect droplet breakup behavior in microfluidic systems. Our results reveal contact angle-dependent flow pattern transitions, particularly showing <i>Ca</i>-dependent modulation: With increasing Capillary numbers, the enhancing effect of hydrophilic surfaces on droplet breakup speed gradually decreases. Phase diagrams systematically mapping the (<i>θ</i>, <i>Ca</i>) parameter space elucidate breakup temporal evolution characteristics. These diagrams visually illustrate the impact of these parameters on droplet breakup, showing that good wettability promotes uniform droplet deformation and breakup while minimizing channel clogging risks. Adjusting the liquid slug length effectively controls droplet breakup speed and efficiency, particularly at contact angles above 150° and low Capillary numbers. The research identifies an optimal balance at a contact angle of 120°, where droplet breakup speed and liquid slug length are optimally balanced, maximizing daughter droplet production per unit time. Additionally, the study develops flow pattern distribution diagrams for single droplets and droplet arrays, including their transition boundaries. The study clarifies the conditions for breakup flow pattern transitions under different contact angles and proposes a fitting curve for the transition boundary, offering guidance for microfluidic device design and optimization.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6315 - 6332"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918221","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":"Acidity constants of hydroxyl groups placed in nine selected flavanones from citrus fruits","authors":"Lucia Bartella,&nbsp;Luana Malacaria,&nbsp;Rosangela Elliani,&nbsp;Mario Prejanò,&nbsp;Ilaria Santoro,&nbsp;Leonardo Di Donna,&nbsp;Tiziana Marino,&nbsp;Emilia Furia","doi":"10.1007/s11696-025-04191-5","DOIUrl":"10.1007/s11696-025-04191-5","url":null,"abstract":"<div><p>The knowledge of acid–base dissociation constants, that are characteristic of specific groups or of a combination of groups, is important to fully understand the properties of a molecule in a biological system. In this work, acidity constants of nine flavanones were determined by performing potentiometric titrations in both pH ways, from acid to base and vice versa. The evaluation was carried out in aqueous media (<i>i.e.</i> 0.16 M NaCl) at 37 °C in a wide pH range (from 2 to 9). Results obtained allow the experimental p<i>K</i>_a assignation to hydroxyl groups belonging to selected flavanones, namely naringenin, hesperetin and eriodictyol, as well as their corresponding glycosides and 3-hydroxy-3-methyl glutaryl (HMG) derivatives: naringin, neohesperidin and neoeriocitrin, and melitidin, brutieridin and peripolin, respectively. To confirm the experimental results, quantum chemical calculations were additionally performed on aglycones and on HMG-containing compounds. The well-known instability of these analytes in basic solution produces some differences between the p<i>K</i>_a values obtained in this work and those obtained under different experimental approaches previously reported.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6295 - 6302"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918225","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":"Effect of Zr (IV) polymerization in nitric acid solution on the evolution of hydrated zirconia particles during controlled double-jet precipitation","authors":"Maksim A. Mashkovtsev,&nbsp;Evgenie O. Baksheev,&nbsp;Maksim A. Domashenkov,&nbsp;Denis V. Khionin,&nbsp;Nickolay D. Borodin,&nbsp;Dmitry O. Polivoda,&nbsp;Vitaliy O. Noskov","doi":"10.1007/s11696-025-04160-y","DOIUrl":"10.1007/s11696-025-04160-y","url":null,"abstract":"<div><p>In this study, the effect of the Zr(IV) polymerization degree in a nitric acid solution on the characteristics of hydrated zirconia particles and zirconia powders was investigated. Samples of hydrated zirconia were produced via the controlled double-jet precipitation (CDJP) method. The degree of Zr (IV) polymerization in the solution was varied by modifying the NO₃/ZrO²⁺ ratio. The properties of the hydrated zirconia particles and zirconia powders formed after calcination were investigated via laser diffraction, optical and scanning electron microscopy, X-ray phase analysis, thermogravimetry and BET. The polymerization of Zr (IV) involves the formation and elongation of polymer chains consisting of Zr₄(OH)₈(NO₃)₈ tetramers. An increase in the degree of Zr (IV) polymerization leads to a decrease in the size of the crystallites and an increase in the diameter of the primary particles from 0.7 to 1.8 µm. This facilitated the formation of dense aggregates with significantly reduced macroporosity. The mechanism of particle aggregation obtained by the CDJP method from a zirconium oxynitrate solution with different degrees of Zr(IV) polymerization was established and discussed in detail. The synthesized zirconia powders under consideration hold potential for use in thermal barrier coating applications via thermal spraying techniques.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5899 - 5910"},"PeriodicalIF":2.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918224","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":"Comprehensive stability assessment and photovoltaic applications of double halide perovskites K2TlAlX6 (X = Cl, Br): a DFT study","authors":"Sadaf Nayab,&nbsp;Naimat Ullah Khan,&nbsp;Arshad Khan,&nbsp;Roshan Ali,&nbsp;Aman Ullah,&nbsp;Amjad A. Almunyif","doi":"10.1007/s11696-025-04183-5","DOIUrl":"10.1007/s11696-025-04183-5","url":null,"abstract":"<div><p>This study explores the stability and potential of cost effective, lead-free double perovskites K₂TlAlX₆ (X = Cl, Br) for solar energy harvesting applications. Utilizing density functional theory simulations within the WIEN2k package, we found that both compounds crystallize in cubic phases (space group Fm-3 m). Calculations of formation energy, tolerance factor, and ab-initio molecular dynamics (AIMD) simulations confirm the thermodynamic, structural, and thermal stability of our predicted materials. We calculated the electronic band structure of the studied materials using TB-mBJ, HSE06, and SOC functionals, and found them to be indirect semiconductors, with band gap values of 1.22/1.98/1.28 eV and 1.06/1.622/1.11 eV, respectively for K₂TlAlX₆ (X = Cl, Br) compounds. Additionally, we calculated the electron–hole pair generation energy and exciton binding energy, both of which are comparable to those of silicon (Si) and methylammonium lead iodide (MAPbI₃), suggesting promising optoelectronic performance. Elastic constant calculations confirm mechanical stability, anisotropy, and ductility. Furthermore, analysis of optical properties demonstrates high absorption coefficients (~ 10⁴–10⁵ cm⁻¹) and absorption efficiency (~ 90%) across the entire visible range, emphasizing the potential of our simulated materials for photovoltaic applications.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6195 - 6213"},"PeriodicalIF":2.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918457","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 the stability and electronic properties of half-heusler casisr and casiba for optoelectronic applications","authors":"M. Agouri,&nbsp;A. Abbassi,&nbsp;S. Taj,&nbsp;B. Manaut,&nbsp;A. Dutta,&nbsp;Hanan A. Althobaiti,&nbsp;M. S. Al-Buriahi","doi":"10.1007/s11696-025-04184-4","DOIUrl":"10.1007/s11696-025-04184-4","url":null,"abstract":"<div><p>This study presents a detailed first-principles investigation of the structural, elastic, electronic, and optical properties of the half-Heusler (HH) compounds CaSiSr and CaSiBa, using density functional theory (DFT) within the full-potential linearized augmented plane-wave (FP-LAPW) method, as implemented in WIEN2K. The structural and elastic properties are meticulously evaluated using the Perdew–Burke–Ernzerhof generalized gradient approximation (PBE-GGA), yielding results in strong agreement with established literature benchmarks. The calculated elastic constants satisfy the mechanical stability criteria, confirming the structural robustness of these materials while indicating a predominantly ductile nature. Electronic structure calculations, refined through the Tran–Blaha modified Becke–Johnson (TB-mBJ) exchange potential, reveal semiconducting behavior, with indirect bandgaps of approximately 1.1 eV for CaSiSr and 0.96 eV for CaSiBa. Optical properties are characterized by pronounced ultraviolet absorption, highlighting the suitability of these materials for high-performance optoelectronic applications.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6215 - 6226"},"PeriodicalIF":2.5,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918277","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":"Comparison of the morphology of silver particles prepared by chemical reduction of silver oxide with hydrogen peroxide and its thermal decomposition","authors":"Boris B. Bokhonov,&nbsp;Tatyana A. Borisenko,&nbsp;Olga A. Logutenko,&nbsp;Alexander I. Titkov","doi":"10.1007/s11696-025-04195-1","DOIUrl":"10.1007/s11696-025-04195-1","url":null,"abstract":"<div><p>In this work, two different methods, thermal decomposition and chemical reduction with hydrogen peroxide, were used to prepare metallic Ag and hybrid Ag₂O/Ag particles via pseudomorphic transformation of the Ag₂O microcubes. The as-prepared particles were characterized by X-ray diffraction (XRD), scanning electronics microscopy (SEM), energy-dispersive spectroscopy (EDS), and thermogravimetry (TG). Experimental results showed that, in both cases, the resulting Ag particles retained the shape and size of the Ag₂O ones, although their microstructure differed significantly. Thus, the silver particles that composed the cubic aggregates prepared via chemical reduction of Ag₂O with hydrogen peroxide were significantly smaller than those produced via thermal treatment of Ag₂O. Thermogravimetric analysis showed single-step decomposition with a total mass loss of 67%, corresponding to complete transformation of Ag₂O to Ag. Silver particles of about 10–50 nm in size were formed on the surface of the Ag₂O microcrystals at the initial stages of the thermal decomposition. The complete transformation of Ag₂O into Ag occurred at a temperature of 370 °C with the formation of cubic aggregates consisting of silver particles of 100–150 nm in size, the average edge length of which was ~ 1.2 μm.</p><p>.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"6333 - 6340"},"PeriodicalIF":2.5,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918278","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}