International Journal of Chemical Kinetics最新文献

{"title":"Esterification of butyric acid with n-butanol: Kinetic study using experimental data and modeling","authors":"Ashutosh Kumar Pathak,&nbsp;Madhusree Kundu","doi":"10.1002/kin.21701","DOIUrl":"10.1002/kin.21701","url":null,"abstract":"<p>Present study involves the investigation of the esterification kinetics between butyric acid and <i>n</i>-butanol. This reaction was conducted in a batch reactor, utilizing homogeneous methanesulfonic acid (MSA) catalyst. Response surface methodology (RSM) was conducted prior to the kinetic study using “Design Expert; version-11.0” for finding the causal factors influencing the conversion of butyric acid. Most important factors identified with their limits against conversions (during optimization of the process using RSM) were taken up to critically analyze the effect of them on butyric acid conversion. Concentration and activity-based model of the process were proposed assuming second order reversible reaction scheme using homogeneous MSA catalyst. During the study of non-ideal behavior of the system, UNIFAC model was adapted for assessing the activity coefficients of species present in equilibrated liquid phase. Experimental data were used to evaluate kinetic and thermodynamic parameters such as rate constants, activation energy, enthalpy, and entropy of the system. The endothermic nature of esterification was confirmed by positive value of enthalpy obtained. The effect of various levels of causal variables like temperature (60–90°C), catalyst concentration (0.5–1.5 wt.%), and molar ratio of <i>n</i>-butanol to butyric acid (1–3) on conversion kinetics of butyric acid was investigated during transient and equilibrium phase of the reaction. It has been observed that molar ratio of butanol to butyric acid has the highest influence on the conversion. The rate equation derived offered a kinetic and thermodynamic framework to the generated data. It also exhibits a notable degree of conformity of predicted data to the experimental ones and effectively characterizes the system across different reaction temperatures, reactant molar ratio, and catalyst concentration.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 4","pages":"188-198"},"PeriodicalIF":1.5,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520589","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":"Decoding Coumaphos: Tracing its journey in the lithosphere via degradation mechanisms and assessing sorption proficiency through kinetics study","authors":"Sara Majid,&nbsp;Khuram Shahzad Ahmad,&nbsp;Ibrahim A. A.,&nbsp;Muhammad Azad Malik","doi":"10.1002/kin.21699","DOIUrl":"10.1002/kin.21699","url":null,"abstract":"<p>The fate of Coumaphos in the environment was evaluated through meticulous emulation and analysis of the intricate pedospheric matrices. The fate-determinative investigations entailed a meticulous examination of Coumaphos's behavior, encompassing adsorption and desorption characteristics and its decomposition rate via hydrolysis, photolysis, and intrinsic biological degradation in soil. The interactions between Coumaphos molecules and soils were found to be robust, with physiosorption being the predominant mode of interaction. Thermodynamic analysis, based on the negative values of Gibbs free energy (−23,569 to −15,798 kJ/mol), indicated exothermic and spontaneous adsorption processes. The highest adsorption capacity (<i>K</i>_{<i>d</i>(<i>ads</i>)} = 34.97 μg/mL) was observed in soils with a notable organic matter content (1.99%), exhibiting a C-type isotherm that was confirmed through linear and Freundlich models. Analytical techniques such as ultraviolet-visible spectrophotometry and gas chromatography-mass spectrometry were employed to determine the fate of Coumaphos in soil matrices. The minimum half-lives of Coumaphos in hydrolysis, biodegradation, and photolysis experiments were 203, 52, and 69 days, respectively. These findings highlight the strong affinity of Coumaphos for the selected agricultural soils, indicating limited potential for transformation. Moreover, findings highlight the potential for further optimization of these degradative routes to devise practical strategies for environmental remediation utilizing natural processes.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 4","pages":"171-187"},"PeriodicalIF":1.5,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135222284","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":"Temperature dependent rate constant for the reaction of H-atoms with carbonyl sulfide","authors":"Yuri Bedjanian","doi":"10.1002/kin.21700","DOIUrl":"10.1002/kin.21700","url":null,"abstract":"<p>The kinetics of the reaction of H-atom with carbonyl sulfide (OCS) has been investigated at nearly 2 Torr total pressure of helium over a wide temperature range, <i>T</i> = 255–960 K, using a low-pressure discharge flow reactor combined with an electron impact ionization quadrupole mass spectrometer. The rate constant of the reaction H + OCS → SH + CO (1) was determined under pseudo-first order conditions, monitoring the kinetics of H-atom consumption in excess of OCS, <i>k</i>₁ = 6.6 × 10⁻¹³ × (<i>T</i>/298)³ × exp(−1150/<i>T</i>) cm³ molecule⁻¹ s⁻¹ (with estimated total uncertainty on <i>k</i>₁ of 15% at all temperatures). Current measurements of <i>k</i>₁ at intermediate temperatures (520–960 K) appear to reconcile previous high and low temperature data and allow the above expression for <i>k</i>₁ to be recommended for use in the extended temperature range between 255 and 1830 K with a conservative uncertainty of 20%.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 3","pages":"162-167"},"PeriodicalIF":1.5,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136135082","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":"Kinetics and mechanism of dissolved organic phosphorus (DOP) digestion by the UV/O3 process","authors":"Jialong Zhu,&nbsp;Kaixuan Fang,&nbsp;Mengdi Zhang,&nbsp;Huixuan Chen,&nbsp;Mengfei Zhou,&nbsp;Xiaofang Sun","doi":"10.1002/kin.21695","DOIUrl":"10.1002/kin.21695","url":null,"abstract":"<p>In this study, the kinetics and mechanism of UV/O₃ synergistic oxidative digestion of dissolved organic phosphorus (DOP) were investigated, focusing on the ozone direct oxidation and hydroxyl radical oxidation parts of glufosinate and triphenyl phosphate (TPhP). The p-chlorobenzoic acid (p-CBA) was selected as the probe compound, and two kinds of reaction kinetic models were proposed by competitive kinetic method with <i>R_ct</i> according to the different scale of rate constants of hydroxyl radical oxidation. Under the condition of weakly alkaline (pH = 9.0) and weakly acidic environment (pH = 5.0), the second-order rate constants of glufosinate and TPhP was determined indirectly to be <i>k</i>o_{3/glufosinate} = (2.903 ± 0.247)M⁻¹s⁻¹ and <i>k</i>o_3/TPhP = (3.307 ± 0.204) M⁻¹s⁻¹ by ozone direct oxidation, and <i>k</i>_{·OH/glufosinate} = (1.257 ± 1.031) × 10⁹ M⁻¹s⁻¹ and <i>k</i>_·OH/TPhP = (7.120 × 10⁸ ± 0.963) M⁻¹s⁻¹ by hydroxyl radical oxidation, respectively. The comparison of the contribution levels of the two parts to the digestion process showed that the contribution levels in the digestion of glufosinate and TPhP processes both the contribution of ·OH were higher than those of ozone, 86.3% and 72.6%, respectively.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 3","pages":"150-161"},"PeriodicalIF":1.5,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135888294","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":"Rate coefficients for the gas-phase OH + furan (C4H4O) reaction between 273 and 353 K","authors":"Maria E. Angelaki,&nbsp;Manolis N. Romanias,&nbsp;James B. Burkholder,&nbsp;Vassileios C. Papadimitriou","doi":"10.1002/kin.21697","DOIUrl":"10.1002/kin.21697","url":null,"abstract":"<p>Rate coefficients, <i>k</i>₁, for the gas-phase OH radical reaction with the heterocyclic ether C₄H₄O (1,4-epoxybuta-1,3-diene, furan) were measured over the temperature range 273–353 K at 760 Torr (syn. air). Experiments were performed using: (i) the photochemical smog chamber THALAMOS (thermally regulated atmospheric simulation chamber, IMT NE, Douai-France) equipped with Fourier Transform Infrared (FTIR) and Selected Ion Flow Tube Mass Spectrometry (SIFT-MS) detection methods and (ii) a photochemical reactor coupled with FTIR spectroscopy (PCR, University of Crete, Greece). <i>k</i>₁(273–353 K) was measured using a relative rate (RR) method, in which the loss of furan was measured relative to the loss of reference compounds with well-established OH reaction rate coefficients. <i>k</i>₁(273–353 K) was found to be well represented by the Arrhenius expression (1.30 ± 0.12) × 10⁻¹¹ exp[(336 ± 20)/T] cm³ molecule⁻¹ s⁻¹, with <i>k</i>₁(296 K) measured to be (4.07 ± 0.32) × 10⁻¹¹ cm³ molecule⁻¹ s⁻¹. The <i>k</i>₁(296 K) and pre-exponential quoted error limits are 2σ and include estimated systematic errors in the reference rate coefficients. The observed negative temperature dependence is consistent with a reaction mechanism involving the OH radical association to a furan double bond. Quantum mechanical molecular calculations show that OH addition to the <i>α</i>-carbon (Δ<i>H</i>_r(296 K) = −121.5 kJ mol⁻¹) is thermochemically favored over the <i>β</i>-carbon (Δ<i>H</i>_r(296 K) = −52.9 kJ mol⁻¹) addition. The OH-furan adduct was found to be stable over the temperature range of the present measurements. Maleic anhydride (C₄H₂O₃) was identified as a minor reaction product, 3% lower-limit yield, demonstrating a non-ring-opening active reaction channel. The present results are critically compared with results from previous studies of the OH + furan reaction rate coefficient. The infrared spectrum of furan was measured as part of this study and its estimated climate metrics are reported.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 3","pages":"119-130"},"PeriodicalIF":1.5,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/kin.21697","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135995909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A detailed reaction mechanism for hexamethyldisiloxane combustion via experiments and ReaxFF molecular dynamics simulations","authors":"Yaosong Huang,&nbsp;Hao Chen","doi":"10.1002/kin.21698","DOIUrl":"10.1002/kin.21698","url":null,"abstract":"<p>Hexamethyldisiloxane (HMDSO) is one of the main impurities in the syngas produced from sewage and landfill plants. In order to utilize this syngas or control the characteristics of the generated silica particles, it is crucial to understand the chemical kinetics of HMDSO combustion. This study investigated the process of HMDSO combustion using synchrotron radiation mass spectrometry (SRMS), gas chromatography (GC), and ReaxFF molecular dynamics simulations. First, the force field used for ReaxFF simulation was validated by comparing the energies of different bond lengths, bond angles, and dihedral angles with the ones from DFT calculations. Good agreements were found. Then, ReaxFF simulations of HMDSO combustion with this force field were conducted under various conditions, which include different equivalence ratios (0.67, 1.0, and 1.5) and temperatures ranging from 2000 to 3500 K. The oxidation characteristics of HMDSO were analyzed, including the evolution of gas products and particle formation. Finally, based on the results from experiments and ReaxFF simulations, the reaction pathways, reaction lists, and reaction kinetics data during HMDSO combustion were obtained. A detailed reaction mechanism was proposed and validated by applying it in modeling the H₂/HMDSO/O₂ combustion systems. The temperature and part of the gas products such as CO and CO₂ as well as SiO could be well predicted.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 3","pages":"131-149"},"PeriodicalIF":1.5,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135995768","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":"Kinetics of esterification of acetic acid with n-butanol over different homogeneous acid catalysts","authors":"Rakhi Soni,&nbsp;Ghoshna Jyoti","doi":"10.1002/kin.21694","DOIUrl":"10.1002/kin.21694","url":null,"abstract":"<p>The esterification reaction of n-butanol and acetic acid has been performed in batch reactor in the presence of different homogeneous acid catalyst, namely sulfuric acid, nitric acid, and para toluene sulfonic acid (p-TSA). The objective of present research work is to investigate kinetic behavior of esterification reaction over the temperature range of 60°C–80°C. The effect of reaction parameter such as catalyst loading varied from 1% to 5% v/v and acid to alcohol molar ratio of 1:1, 1:3, and 1:5 has been observed. A pseudo homogeneous kinetic model has been applied. Kinetic parameters such as equilibrium constant, reaction rate constant, enthalpy, activation energy, and entropy were calculated by the experimental data for different acid catalyst system. It was observed that sulfuric acid gives higher conversion 73% than p-TSA 68.5% and nitric acid 66.25% at temperature of 80°C, 1:1 molar ratio and 3% catalyst concentration. The activation energy was estimated 36448.49, 23324.31 and 19060.156 J/mol K for three different catalyst sulfuric acid, nitric acid and p-TSA respectively. The enthalpy and entropy of the esterification reaction of acetic acid with n-butanol over three different catalysts has been calculated (Enthalpy: 25.788 KJ/mol, 12.256 KJ/mol, 28.320 KJ/mol, Entropy: 88.1 J/mol K, 45.298 J/mol K, 91.44 J/mol K) and found enthalpy is having positive value that shows reaction is endothermic.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 2","pages":"96-104"},"PeriodicalIF":1.5,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136080033","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":"Kinetics of direct and water-mediated tautomerization reactions of nucleobases at low temperatures ⩽200 K","authors":"Judith Würmel,&nbsp;John M. Simmie","doi":"10.1002/kin.21696","DOIUrl":"10.1002/kin.21696","url":null,"abstract":"<p>Detailed chemical kinetic mechanisms for the synthesis of complex organic molecules in the interstellar medium are at an early stage of developement. That such synthesis must take place is well-known from chemical analysis of sampled asteroids. As molecular complexity increases the number of possible structural isomers also increases with the consequence that the nascent species may adopt a different spatial arrangement, to the lowest energy one. As part of a program of investigations of the hydrogen atom transfer reaction or tautomerization of imidic acid–amide species H-O=C-N- <math>\u0000 <semantics>\u0000 <mo>⇌</mo>\u0000 <annotation>$rightleftharpoons$</annotation>\u0000 </semantics></math> O=C-N-H we have studied the kinetics for a number of nucleobases, namely cytosine, thymine and uracil where a cyclic form of tautomerism (lactim–lactam) is encountered. Together with a fourth, 5-aza-uracil (1,3,5-triazine-2,4(1<i>H</i>,3<i>H</i>)-dione), we report on the rates of reaction at low temperatures 50–200 K for both the direct unimolecular process and the similar transformation mediated by an additional water molecule. We show that these tautomerization reactions can be categorized into three classes, and highlight the importance of quantum mechanical tunneling on the rate constants at these low temperatures. We further present some thermochemistry data, such as formation enthalpies, entropies, isobaric heat capacities and enthalpy functions.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 2","pages":"105-116"},"PeriodicalIF":1.5,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/kin.21696","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136080044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of anionic methyl orange dye by polyaniline, poly(o-methylaniline) and poly(o-methoxyaniline)","authors":"Timur T. Sadykov,&nbsp;Roman S. Syakaev,&nbsp;Anastasia N. Andriianova,&nbsp;Akhat G. Mustafin","doi":"10.1002/kin.21693","DOIUrl":"10.1002/kin.21693","url":null,"abstract":"<p>This study reports the effect of substituents in the ortho position of polyaniline on the adsorption capacity to remove the anionic dye methyl orange (MO) from an aqueous solution. The aim of this study is the synthesis of polyaniline (PANI) and its derivatives, poly-o-methylaniline (poly-o-toluidine, POT) and poly-o-methoxyaniline (poly-o-anisidine, POA) for the adsorption removal of MO dye. All polymers were obtained by oxidative polymerization of the corresponding monomers and characterized by scanning electron microscopy (SEM) and infrared spectroscopy (IR). The average particle size of the polymer was about 200 nm. The effect of various parameters such as pH, temperature, adsorption time and initial concentration was analyzed. It was found that the adsorption capacity for dye removal increases from 50.68 to 222.56 mg g⁻¹ for PANI, from 16.89 to 66.57 mg g⁻¹ for POT, and from 97.26 to 532.54 mg g⁻¹ for POA with an increase in the initial dye concentration from 5 up to 50 mg L⁻¹. For all polymers, the equilibrium state of MO adsorption was reached in 50 min. The results showed that MO adsorption on PANI, POT, and POA is well described by a pseudo second order kinetic model. Isothermal studies have shown that adsorption is in good agreement with the Langmuir isotherm model, as evidenced by higher values of correlation coefficients. Based on the data of thermodynamic studies, it was concluded that MO adsorption on PANI, POT, and POA is spontaneous and endothermic.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 2","pages":"81-95"},"PeriodicalIF":1.5,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135858652","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":"Thermal degradation of virgin and waste plastics: Estimation of kinetic and thermodynamic parameters using model-free iso-conversional methods","authors":"Rohit Kumar Singh,&nbsp;Prithviraj Gupta,&nbsp;Biswajit Ruj,&nbsp;Anup Kumar Sadhukhan,&nbsp;Parthapratim Gupta","doi":"10.1002/kin.21692","DOIUrl":"10.1002/kin.21692","url":null,"abstract":"<p>Kinetic triplets—apparent activation energy (<i>E_a</i>), pre-exponential factor (<i>A</i>), and the reaction model—were estimated for the thermal degradation of three primary virgin and waste plastics, as well as mixed plastics waste. Model-free iso-conversional FWO, KAS, Starink, Kissinger and Vyzovkin and Friedman methods were employed for the kinetic analysis. The apparent activation energy was determined by the integral methods as 206.5-209.1 kJ mol⁻¹ and 195.6-198.8 kJ mol⁻¹ for the virgin and waste high-density polyethylene (HDPE), 211.6-214.1 kJ mol⁻¹ and 183.1-186.6 kJ mol⁻¹ for the virgin and waste polypropylene (PP), 144.0-163.1 kJ mol⁻¹ and 159.7-167.1 kJ mol⁻¹ for the virgin and waste polystyrene (PS), and 173.6-178.9 kJ mol⁻¹ for the mixed plastics waste respectively. <i>E_a</i> was found to follow the trend HDPE &gt; PP &gt; PS with higher values for HDPE and PP virgin samples than that for their waste and marginally smaller for the virgin PS than its waste. Degradation of all plastic samples followed Avrami-Erofeev equation with <i>n</i> varying between 1.0 and 1.8. The effect of conversion on <i>E_a</i> suggested the degradation of both virgin and waste HDPE to consist of multiple parallel reactions while that of others to be more complex. FTIR analysis of the evolved gases was used to explain the possible reaction mechanism. A small difference between the enthalpy change and the apparent activation energy (6-7 kJ mol⁻¹) for all plastic samples indicated favourable pyrolysis reactions. The estimated kinetic parameters and thermodynamic properties showed the stability of different plastics as HDPE &gt; PP &gt; PS.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"56 2","pages":"61-80"},"PeriodicalIF":1.5,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135014551","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}