The Journal of Physical Chemistry C最新文献

{"title":"Octaethyl vs Tetrabenzo Functionalized Ru Porphyrins on Ag(111): Molecular Conformation, Self-Assembly and Electronic Structure","authors":"Dennis Meier, Peter Knecht, Pablo Vezzoni Vicente, Fulden Eratam, Hongxiang Xu, Tien-Lin Lee, Alexander Generalov, Alexander Riss, Biao Yang, Francesco Allegretti, Peter Feulner, Joachim Reichert, Johannes V. Barth, Ari Paavo Seitsonen, David A. Duncan, Anthoula C. Papageorgiou","doi":"10.1021/acs.jpcc.4c06978","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06978","url":null,"abstract":"Metalloporphyrins on interfaces offer a rich playground for functional materials and hence have been subjected to intense scrutiny over the past decades. As the same porphyrin macrocycle on the same surface may exhibit vastly different physicochemical properties depending on the metal center and its substituents, it is vital to have a thorough structural and chemical characterization of such systems. Here, we explore the distinctions arising from coverage and macrocycle substituents on the closely related ruthenium octaethyl porphyrin and ruthenium tetrabenzo porphyrin on Ag(111). Our investigation employs a multitechnique approach in ultrahigh vacuum, combining scanning tunneling microscopy, low-energy electron diffraction, photoelectron spectroscopy, normal incidence X-ray standing wave, and near-edge X-ray absorption fine structure, supported by density functional theory. This methodology allows for a thorough examination of the nuanced differences in the self-assembly, substrate modification, molecular conformation and adsorption height.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"38 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic Insights into Glycerol Ketalization to Glycerol Levulinate Ketal over USY Molecular Sieve","authors":"Zhen Ma, Liutao Hou, Yucheng Lin, Xiuli Han, Haoran Wu, Chunbao Xu, Chun Chang","doi":"10.1021/acs.jpcc.4c07012","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c07012","url":null,"abstract":"Efficient ketalization of glycerol and alkyl levulinate to high-value-added glycerol levulinate ketal (GLK) and insights into the catalytic mechanism are of great significance but remain challenging without a clear understanding of active sites. Herein, the ketalization of glycerol with methyl levulinate (ML) and ethyl levulinate (EL) to methyl glycerol levulinate ketal (MLK) and ethyl glycerol levulinate ketal (ELK) over USY molecular sieves was reported. Under the optimal conditions, the yields of MLK and ELK can reach 96%. A kinetic study indicated that the ketalization of alkyl levulinate and glycerol to GLK followed the pseudo-second-order kinetic model, and the activation energy for MLK synthesis (154.87 kJ·mol^–1) over USY(6) was lower than that of ELK (168.03 kJ·mol^–1) over USY(10). Density functional theory calculations revealed that AlOOH sites and Al³⁺ sites in USY exhibit identical catalytic activity during the synthesis of MLK (or ELK). Furthermore, the formation of an ether intermediate (IM2) from the acyl group of ML attacked by the GLY-terminated hydroxyl was the rate-determining step of MLK production on the AlOOH sites, while the intramolecular cyclization of an intermediate IM3 containing a carbocation to form ELK was the rate-determining step of EL ketalization on the Al³⁺ sites.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"115 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the Intrinsic Catalytic Reactivity of Various Transition-Metal Ions Substituted in CeO2 for Cyclohexane Oxidation: A Correlation between Catalytic Activities and Electronic States of the Substituent Ions","authors":"Sudip Dandapat, Phanikumar Pentyala, L. R. Pravallika Ganamani, Parthasarathi Bera, Sujan Sen, Aathira Bhaskaran, Sounak Roy, Pravin R. Likhar, Tapas Kumar Mandal, Parag A. Deshpande, Tinku Baidya","doi":"10.1021/acs.jpcc.4c07609","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c07609","url":null,"abstract":"Cyclohexane oxidation into a ketone–alcohol mixture (KA oil) or adipic acid is an industrially significant reaction. Transition metal (TM) ion, as a core component of supported metal oxide catalysts, plays a significant role in cyclohexane oxidation. The mechanism of interaction between the transition metal ion and C–H bond in cyclohexane remains unexplored in the literature. In this study, various transition metal (Cr, Mn, Fe, Co, Ni, Cu, and Zn) ion-substituted CeO₂ catalysts have been prepared, characterized, and tested for catalytic activities in cyclohexane oxidation using O₂ as the oxidant. The average rate of cyclohexane conversion over the unit surface of the catalysts has been calculated to evaluate the intrinsic catalytic reactivity of the TM ions substituted in the CeO₂ lattice. The average rate, normalized with respect to the number of Cr ions over the unit surface (in 10% Cr/CeO₂), was the parameter to find the most active TM ion for the reaction. The mechanistic pathway of C–H activation over the TM ions-substituted CeO₂ catalysts has been supported by DFT calculations, indicating the formation of a reactive cyclohexene intermediate for the first time. Therefore, the rates of conversion of cyclohexane and cyclohexene over the Cu/CeO₂ catalyst have been calculated to determine the relative reactivity of the intermediate. The reactivity of the metal ions, in terms of the average rate of conversion, has been correlated to the electronic state of the doped transition metal ions.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"47 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiscale Modeling of Charge Transport in Organic Semiconductors: Assessing the Validity of the Harmonic Approximation for Low-Frequency Vibrations","authors":"Daniele Padula, Leonardo Barneschi, Alessandro Landi","doi":"10.1021/acs.jpcc.4c06790","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06790","url":null,"abstract":"In recent years, the importance of intrinsic disorder in organic semiconductors has gained increasing attention as a factor limiting transport properties in these substrates. In particular, the presence of low-frequency phonon modes modulating transport questions the adoption of the harmonic approximation in theoretical descriptions of such modes, since large displacements from equilibrium positions are expected. Herein, we have analyzed the transport process in several organic semiconductors using a combination of molecular dynamics simulations based on quantum mechanically derived force fields, together with transferable and differentiable deep learning models, trained on density functional theory calculations, able to predict transfer integrals and their gradients for different substrates, providing the ingredients to be used within a kinetic Monte Carlo prediction of charge mobility. In particular, we obtained the fluctuations of transfer integrals for several molecular species in their crystals with the harmonic approximation, both adopting DFT and a differentiable deep learning model, which was also used within anharmonic strategies exploiting molecular dynamics. Although the comparison among the different approaches used to evaluate transfer integral fluctuations was difficult to interpret, we incorporated fluctuations as disorder in a kinetic Monte Carlo calculation of charge mobility, to compare with experiments. Mobilities computed with disorder described with different theoretical foundations were consistent and in agreement with experimental and literature data, highlighting that, although low-frequency modes are involved in the modulation of transport properties, the harmonic approximation is still appropriate.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"19 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive Experimental and Theoretical Study on the Adsorption and Corrosion Inhibition Efficiency of Pyronin B for Mild Steel Protection in HCl Solution","authors":"Ramazan Solmaz, Abdullah Salci, Mustafa Doğrubaş, Yeşim Aydın Dursun, Savaş Kaya, Avni Berisha, Gülfeza Kardaş","doi":"10.1021/acs.jpcc.4c06003","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06003","url":null,"abstract":"Mild steel (MS) is one of the most widely used materials in industry. But, this metal corrodes easily, especially in acidic solutions. Therefore, protection of this metal is critical. The use of inhibitors is one of the most practical and economical ways of achieving this. The corrosion inhibition performance of Pyronin B (PyB) for the protection of mild steel (MS) was investigated in 1 M HCl solution using the change of open circuit potential with exposure time (<i>E</i>_ocp-<i>t</i>), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques. The surface of the MS was examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and contact angle measurements. The electrochemical stability of the PyB film formed on the MS surface was investigated by cyclic voltammetry (CV). The excess surface charge of the metal in the inhibited solution was estimated with the help of EIS studies. The experimental data were supported by theoretical approaches such as density functional theory (DFT) calculations, molecular dynamics (MD) and Monte Carlo simulations. It was found that PyB forms a uniformly distributed, dense, and protective organic film on the steel surface. The PyB molecules interact with the MS surface through a combination of physical and chemical interactions, the latter being dominant. The PyB acts as a mixed-type inhibitor, with a more pronounced effect on the anodic mechanism. Its corrosion inhibition efficiency depends on its concentration, reaching 95.9% efficiency at 0.01 mM. The inhibitor acts as an inhibitor without altering the mechanism of the cathodic reaction and by altering the mechanism of the anodic reaction. The overall corrosion reaction is kinetically controlled. The surface film exhibits very high electrochemical stability under potentiodynamic conditions. Theoretical approaches supported the experimental results and indicated superior inhibitory capability of PyB. The chemical reactivity of the studied inhibitor system was explained in the light of Conceptual Density Functional Theory based calculations and electronic structure principles. The binding energy, which reflects the power of the interaction between Fe(110) surface and PyB, was found to be 3.43 eV. Binding energies calculated by both DFT and MD and MC simulations support that the adsorption of the inhibitor is chemical, as noted in the experimental section.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"91 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-Polarization Valley Features in a Sc-Doped FeCl2 Monolayer under Strain","authors":"Si-Tong Bao, Su-Tao Sun, Li-Li Zhang, Fu-Mei Lang, Yi-Chi Li, Jian Zhou, Hai-Ming Lu","doi":"10.1021/acs.jpcc.4c05977","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05977","url":null,"abstract":"Two-dimensional valley materials have gained extensive interest for their potential applications in valleytronics, while large spontaneous valley polarization usually occurs in either the conduction or valence bands of most previously reported materials. Herein, through the first-principles calculations, we propose that rare dual-polarization valley features can be achieved in both the conduction and valence bands of an FeCl₂ monolayer by transition metal doping. Electrons and holes with opposite spins would occupy these valley-polarized energy levels, and thus, a spin valley Hall device with high efficiency and low energy consumption can be designed. Especially for the Sc-doped case, there are no impurity states in the band gap, beneficial for its practical applications. Moreover, the valley polarization in the Sc-doped FeCl₂ monolayer can be further engineered by biaxial strain. Our finding can benefit the modulation of the valley physics.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"10 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of Paramagnetic Aluminum Hole Centers in UV–C Persistent Luminescence of Ca2Al2SiO7:Pr3+","authors":"Andris Antuzevics, Guna Krieke, Guna Doke, Pavels Rodionovs, Dace Nilova, Jekabs Cirulis, Andris Fedotovs, Uldis Rogulis","doi":"10.1021/acs.jpcc.4c06848","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06848","url":null,"abstract":"Materials with self-sustained emission in the ultraviolet (UV) spectral range present significant potential for practical applications. In this study, photochromic and persistent luminescence properties of Ca₂Al₂SiO₇:Pr³⁺ are characterized by diffuse reflectance, photoluminescence, and thermally stimulated luminescence (TSL) spectroscopy methods. The material exhibits efficient persistent luminescence in the 250–350 nm range, with power density reaching 10.6 mW/m² detected 10 s after 250 nm excitation and lasting for 3.7 h over the radiance threshold of 5 × 10^–4 mW/m²/sr. In addition, photochromism is observed after either UV or X-ray irradiation. Multiple excitation cycles lead to noticeable coloration and reduced luminescence intensity, which can be restored by annealing. Electron paramagnetic resonance (EPR) spectroscopy indicates a correlation between persistent luminescence, photochromic properties, and paramagnetic centers in the material. The paramagnetic centers are identified as self-trapped holes at the Al(2) sites of the lattice, based on the <i>g</i>-factor and hyperfine interaction values determined from EPR and electron–nuclear double resonance (ENDOR) spectra simulations. These results provide a fundamental understanding of the structure–property relationship in Ca₂Al₂SiO₇ and highlight practical considerations for developing UV–C persistent phosphor materials.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"22 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas-Phase Impurities in Hydrogen: DFT Calculations and Experimental Analysis of Interactions with Gadolinium Hydride Surfaces","authors":"Shmuel Barzilai, Orit Mendelson, Michael Aizenshtein, Moshe H. Mintz","doi":"10.1021/acs.jpcc.4c05097","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05097","url":null,"abstract":"The interactions between gaseous hydrogen and metallic compounds are of significant basic scientific interest as well as important in various practical applications, including metal hydride formation, energy storage systems, and catalysis. Typically, the initial hydrogenation process involves surface hydrogen dissociation on the native oxide layers followed by atomic hydrogen penetration through those layers into the underlying metallic compounds. Recent research has demonstrated that common impurities (e.g., CO, CO₂, O₂) in the hydrogen stream inhibit the initial hydrogenation process but do not prevent it completely. Even at relatively high impurity concentrations, localized hydride “patches” may form, which in some instances are sufficiently large to disrupt the oxide overlayer. Consequently, during the hydrogenation process hydrogen may interact with two distinct surface types: the native oxide of the metallic compound and the hydride patches formed during the initial hydrogenation stage. This study investigates the impact of gaseous impurities on hydrogen–hydride surface interactions through both experimental and theoretical approaches. Density Functional Theory (DFT) calculations were employed to evaluate the molecular adsorption energies and interaction energies between hydrogen and impurities on the hydride surface. Application of the Langmüir model, incorporating calculated adsorption energies at various pressures and temperatures, indicates complete impurity coverage of the hydride surface, even at very low impurity concentrations. This suggests that, when the hydrogen gas phase contains such impurities, the essential H₂ dissociation step is likely to be inhibited on the regular GdH₂ surface. Furthermore, if dissociation occurs (at surface defects or on the coexisting oxide surface near the hydride), the penetration of the hydridic moiety (H^–δ) through the hydride is generally suppressed due to its capture by impurities, forming new adsorbed species such as ·H₂CO, ·HCO₂, and ·OH. The results of these calculations were experimentally compared. The influence of the above impurities on hydrogenation kinetics was studied using gravimetric analysis combined with X-ray diffraction (XRD) measurements. The results corroborate with the theoretical findings, demonstrating that pure hydrogen yields the highest formation rate, while the presence of low impurity concentrations in the hydrogen stream suppresses and limits the progress of the hydrogenation process on the dihydride surface. The elucidated hydrogenation mechanisms of the impurity effect on the gadolinium hydride development provide valuable insights for the deployment of novel hydrogen storage procedures.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"119 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron Transport in Soft-Crystalline Thin Films of Perylene Diimide Substituted with Swallow-Tail Terminal Alkyl Chains","authors":"Piotr Ślęczkowski, Yiming Xiao, Jeong Weon Wu, Chihaya Adachi, Lydia Sosa Vargas, David Kreher, Benoît Heinrich, Jean-Charles Ribierre, Fabrice Mathevet","doi":"10.1021/acs.jpcc.4c06222","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c06222","url":null,"abstract":"We have examined the structural and electron transport properties of a swallow-tailed <i>N</i>,<i>N</i>’-bis(1-heptyloctyl)-perylene-3,4:9,10-bis(dicarboximide) (<b>PDI-C8,7</b>) in thin films. A comprehensive analysis of material with the use of X-ray scattering methods evidenced the appearance of a new soft-crystalline mesophase that was induced by thermal processing of the swallow-tail PDI derivative. By combining electrical measurements with grazing-incidence wide-angle X-ray scattering (GIWAXS), we show that these morphological changes of thin films boost their charge transport in the organic field-effect transistor (OFET) configuration. The systematic device engineering of OFETs, including device architecture, thermal history, and preparation method of the active layer, resulted in a significant improvement in the electron field-effect mobility and the related performance parameters. In particular, the results demonstrate a strong improvement in the charge transport of <b>PDI-C8,7</b> films in their soft-crystalline phase, which originates from the <i>N</i>-substitution by swallow-tails. In addition, our study demonstrates that the melt-processing route, a solvent-free and vacuum-free method for the fabrication of organic thin films, represents an efficient strategy for the fabrication of high-performance air-stable <i>n</i>-type OFETs.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"29 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical Insights into the Electrochemical Stability of Pt-Based Intermetallic Compounds","authors":"Xinshuang Wang, Zhonglong Zhao","doi":"10.1021/acs.jpcc.4c05689","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05689","url":null,"abstract":"Pt-based intermetallic compounds (IMCs) with ordered atomic arrays of constituent metals have drawn increasing attention for energy conversion applications, but a deep understanding of their electrochemical stability is still missing. In this work, using a scheme combining density functional theory (DFT) calculations with experimental thermodynamic data, we explore key factors affecting the phase stability of 25 L1₂-Pt₃M IMCs in aqueous media. We show that L1₂-Pt₃M IMCs maintain their metal phase at reductive potentials but will dissolve into Pt- and M-derived oxides or dissolved species at oxidative conditions. We identify the reduction potential of the M metal and the formation energy of the IMC as the two key factors affecting the aqueous stability of L1₂-Pt₃M IMCs. Interestingly, including either early or late metals into the intermetallic structure can both enlarge the potential range for stabilizing the metal phase of L1₂-Pt₃M IMCs, which can be attributed to the formation of Pt-M quasi-covalent structural networks mediated by the d-d orbital hybridizations.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"42 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}