Computational and Theoretical Chemistry最新文献_第8页

Exploring thermoelectric conduction in new graphene-based molecular junctions dispositive: A computational perspective

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-13 DOI: 10.1016/j.comptc.2025.115141

Jonathan A. Da Silva , Gabriela Monteiro B. Da Silva , Roberta P. Dias , Augusto Cesar L. Moreira , Julio C.S. Da Silva

{"title":"Exploring thermoelectric conduction in new graphene-based molecular junctions dispositive: A computational perspective","authors":"Jonathan A. Da Silva , Gabriela Monteiro B. Da Silva , Roberta P. Dias , Augusto Cesar L. Moreira , Julio C.S. Da Silva","doi":"10.1016/j.comptc.2025.115141","DOIUrl":"10.1016/j.comptc.2025.115141","url":null,"abstract":"<div><div>This study investigates graphene-based materials as potential candidates for molecular junction devices in thermoelectric applications. Using Density Functional Theory, Landauer-Büttiker scattering theory, and the complex absorbing potential technique, we examined molecular systems with pyrene as the conductive wire and graphene or aza-graphene as electrodes. The calculated conductance values (6.20 × 10<sup>−4</sup> G₀ and 1.80 × 10<sup>−5</sup> G₀ for graphene and aza-graphene systems, respectively) reveal a tenfold increase in the graphene system due to transport through the LUMO orbital. The thermoelectric power values (0.5–2.5 μV·K<sup>−1</sup>) were comparable to those of gold-based systems. Chemical modifications, such as the insertion of NO₂ into pyrene, further enhanced conductance. These findings underline the molecular structure's critical role in determining transport properties and place graphene-based systems as viable thermoelectric materials.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115141"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427688","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}

引用次数: 0

A theoretical investigation of the competition between σ- and π-holes on the stability of cyclic complexes resulting from the interaction between PO₂Cl and HSX molecules (X = F, Cl, Br, and I)

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-12 DOI: 10.1016/j.comptc.2025.115142

Mohammadmehdi Moradkhani , Ali Naghipour , Yunes Abbasi Tyula , Yosra Moradkhani , Saeid Taghavi Fardood

{"title":"A theoretical investigation of the competition between σ- and π-holes on the stability of cyclic complexes resulting from the interaction between PO₂Cl and HSX molecules (X = F, Cl, Br, and I)","authors":"Mohammadmehdi Moradkhani , Ali Naghipour , Yunes Abbasi Tyula , Yosra Moradkhani , Saeid Taghavi Fardood","doi":"10.1016/j.comptc.2025.115142","DOIUrl":"10.1016/j.comptc.2025.115142","url":null,"abstract":"<div><div>This research theoretically examined the interactions between PO₂Cl and HSX molecules (X = F, Cl, Br, I) at the MP2/aug-cc-pVTZ(PP) computational level. The MEP analysis showed that the PO₂Cl-C₂v symmetry had two π- and σ-hole regions contributing to the PnB and XB interactions, while the HSX molecules, with maximum potential regions on the H and S atoms participated in the HB-ChB interactions. Geometry optimization revealed three types of cyclic complexes: PnB -HB (Structure-I), ChB-ChB (Structure-II), and XB-XB (Structure-III). The interaction energy results demonstrated that structure-I complexes were the most stable, whereas structure-III complexes were the least stable. This stability could be attributed to the ability of π- and σ-holes to pull the electron cloud of electron-donating species toward themselves. The EDA analyses confirmed the key role of electrostatic and orbital interactions in the stability of the complexes. Various methods were used to thoroughly examine the properties of the complexes.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115142"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438064","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}

引用次数: 0

Enhanced gas sensing in transition metal-doped Ga2O3 monolayer

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-12 DOI: 10.1016/j.comptc.2025.115145

Zihan Chen , Hui Feng , Huahan Zhan , Junyong Kang , Yongliang Zhou

引用次数: 0

The first principles investigation of free‑lead perovskite-type hydrides CsXH3 (X = Sc, Y) for hydrogen storage application

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-12 DOI: 10.1016/j.comptc.2025.115144

M. Kashif Masood , Wahidullah Khan , Shumaila Bibi , Omer Munir , Shishir Timilsena , Javaria Kanwal , Javed Rehman , Razan A. Alshgari

{"title":"The first principles investigation of free‑lead perovskite-type hydrides CsXH3 (X = Sc, Y) for hydrogen storage application","authors":"M. Kashif Masood , Wahidullah Khan , Shumaila Bibi , Omer Munir , Shishir Timilsena , Javaria Kanwal , Javed Rehman , Razan A. Alshgari","doi":"10.1016/j.comptc.2025.115144","DOIUrl":"10.1016/j.comptc.2025.115144","url":null,"abstract":"<div><div>Utilizing density functional theory (DFT), we carried out a comprehensive analysis of the novel CsXH<sub>3</sub> (X: Sc and Y) perovskite hydride's structural, mechanical, electronic, magnetic, thermodynamic, optical, and hydrogen storage properties. Through cohesive energy and elastic moduli calculations, we found that the CsXH<sub>3</sub> compounds demonstrated both mechanical and thermal stability. For Sc and Y, the lattice constants in the crystal structure of CsXH<sub>3</sub> (X: Sc and Y) compounds are 3.376 Å and 3.525 Å, respectively. Currently, the overall observations of band structure and electronic density of states are used to evaluate the metallic character of these compounds. These substances appear to be malleable materials, according to the B/G ratio (Pugh's ratio) study. Subsequent analysis indicated that the majority of their bond types are ionic. These compound features have led to the conclusion that they are non-magnetic order conductors. Furthermore, these materials have optical properties such as refractive index, dielectric function, absorption, and conductivity that show promise. According to our predictions, CsScH<sub>3</sub> is a better hydride with exact optical characteristics. Vibrational stability of these crystalline materials was studied using molecular dynamics simulations and phonon dispersion curves. In addition, the study evaluated the CsXH<sub>3</sub> compounds' ability to store hydrogen, resulting in 1.67 wt% for CsScH<sub>3</sub> and 1.35 wt% for CsYH<sub>3</sub>. This discovery opens up new possibilities in the realm of hydrogen storage materials as it is the first analysis of CsXH<sub>3</sub> perovskite hydrides.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115144"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421825","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}

引用次数: 0

Theoretical insights into single- and co-sensitization of indolocarbazole-based dyes on anatase (101) surface for efficient dye-sensitized solar cells 锐钛矿 (101) 表面吲哚咔唑类染料单敏化和共敏化用于高效染料敏化太阳能电池的理论见解

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-11 DOI: 10.1016/j.comptc.2025.115143

Dou-Dou Deng , Jia-Kang Shi , Jin-Xu Tong , Feng Wang , Xian-Lei Shi , Jie-Qiong Li , Wei Wei

{"title":"Theoretical insights into single- and co-sensitization of indolocarbazole-based dyes on anatase (101) surface for efficient dye-sensitized solar cells","authors":"Dou-Dou Deng , Jia-Kang Shi , Jin-Xu Tong , Feng Wang , Xian-Lei Shi , Jie-Qiong Li , Wei Wei","doi":"10.1016/j.comptc.2025.115143","DOIUrl":"10.1016/j.comptc.2025.115143","url":null,"abstract":"<div><div>Co-sensitization strategy is an efficient approach to improve the power conversion efficiency of dye-sensitized solar cells (DSSCs). In this work, we firstly investigated the properties of three designed indolocarbazole-based dyes (D<sub>1</sub>-π<sub>1</sub>-D<sub>2</sub>-π<sub>2</sub>-A, <strong>IPZ-TV</strong>, <strong>IPZ-2TV</strong> and <strong>IPZ-3TV</strong>) using the density functional theory (DFT) and time-dependent DFT (TD-DFT) methods. The thiophene vinylene group as a π<sub>2</sub>-bridge into the reference dye <strong>IPZ</strong> can improve the light-harvesting capacity. Among the three designed dyes, <strong>IPZ-2TV</strong> with two thiophene units is of the best performance because of the excellent intramolecular charge transfer (ICT) characteristic and outstanding photovoltaic performance. Then, using the best performing <strong>IPZ-2TV</strong> with a co-sensitizer adsorption on TiO<sub>2</sub> surface, the interaction between <strong>IPZ-2TV</strong> and TiO<sub>2</sub> is significantly enhanced. Besides, the co-sensitization combination of <strong>IPZ-2TV</strong> + <strong>BPO</strong> exhibits superior ICT and absorption characteristics, allowing us conclude that IPZ-based dyes are more likely to be co-sensitized with the metal-complex sensitizers to enhance the performance of DSSCs.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1247 ","pages":"Article 115143"},"PeriodicalIF":3.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520574","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}

引用次数: 0

Theoretical study of novel xanthene-linked L-(D-π-a)2-type double-anchored dyes for dye-sensitized solar cells: Effects of π bridge length and TiO2 adsorption pattern

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-08 DOI: 10.1016/j.comptc.2025.115125

Jingping Li , Huijie Guo , Yanan Zhong , Yuanzuo Li , Peng Song

{"title":"Theoretical study of novel xanthene-linked L-(D-π-a)2-type double-anchored dyes for dye-sensitized solar cells: Effects of π bridge length and TiO2 adsorption pattern","authors":"Jingping Li , Huijie Guo , Yanan Zhong , Yuanzuo Li , Peng Song","doi":"10.1016/j.comptc.2025.115125","DOIUrl":"10.1016/j.comptc.2025.115125","url":null,"abstract":"<div><div>To investigate the effects of varying π bridge lengths on the structural and electronic properties, two <sub>L</sub>-(D-π-A)<sub>2</sub>-type dye molecules were simulated using density functional theory (DFT). In this study, KS-19 employed thiophene as the π bridge, while KS-21 incorporated 2,2′-bithiophene. The optimized geometry revealed that the presence of 2,2′-bithiophene in the KS-21 molecule enhances its degree of conjugation, thereby exhibiting superior molecular stability. The additional thiophene unit in KS-21 was found to facilitate a red shift in the absorption spectra based on optical property analysis. Furthermore, 2,2′-bithiophene within the KS-21 molecule proved more effective for achieving dye regeneration and complete electron injection. Additionally, we simulated their adsorption behavior on titanium dioxide clusters and calculated their adsorption energies. Our investigation demonstrated that the KS-21 dye with a 2,2′-bithiophene π spacer exhibited enhanced photovoltaic performance. Consequently, double-anchored dyes incorporating extended π conjugated structures show significant promise across various applications in dye-sensitized solar cells.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115125"},"PeriodicalIF":3.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388035","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}

引用次数: 0

Efficient molecular recognition of polycyclic aromatic hydrocarbons by X-diimide-pillar[4,6]arenes

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-06 DOI: 10.1016/j.comptc.2025.115127

Wanting Wang , Yuke Zuo , Ziqing Xi , He Yuan , Maoxia He , Ju Xie

{"title":"Efficient molecular recognition of polycyclic aromatic hydrocarbons by X-diimide-pillar[4,6]arenes","authors":"Wanting Wang , Yuke Zuo , Ziqing Xi , He Yuan , Maoxia He , Ju Xie","doi":"10.1016/j.comptc.2025.115127","DOIUrl":"10.1016/j.comptc.2025.115127","url":null,"abstract":"<div><div>Polycyclic aromatic hydrocarbons (PAHs) are a kind of carcinogenic substances, which exist widely in the environment. In order to effectively control PAHs, a molecular recognition strategy was reported by using X-diimide-pillar[4,6]arenes (X = Aryl group) as host compounds. X-diimide-pillar[4,6]arenes have stable topological structures with electron-deficient molecular cavities. Therefore, they were able to form host-guest inclusion complexes with PAH pollutants. For all inclusion complexes, the geometrical structures, electronic structures, non-covalent interactions, and thermodynamic stabilities were discussed systematically based on density functional theory (DFT) calculations. X-diimide-pillar[6]arenes had better recognition ability toward PAHs due to their larger molecular cavities. C-H···π and π···π stacking interactions were the main contributions to the formation of the host-guest complexes. Furthermore, molecular dynamics (MD) simulations showed that X-diimide-pillar[6]arenes could capture PAH molecules in solvents and exist stably in the form of host-guest complexes.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115127"},"PeriodicalIF":3.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143328314","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}

引用次数: 0

Structure and dynamic properties of Polybenzimidazolium and Polybenzimidazolide in a mixture of salt and water using all atom molecular dynamics simulations

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-04 DOI: 10.1016/j.comptc.2025.115128

Sammed Patil, Praveenkumar Sappidi

{"title":"Structure and dynamic properties of Polybenzimidazolium and Polybenzimidazolide in a mixture of salt and water using all atom molecular dynamics simulations","authors":"Sammed Patil, Praveenkumar Sappidi","doi":"10.1016/j.comptc.2025.115128","DOIUrl":"10.1016/j.comptc.2025.115128","url":null,"abstract":"<div><div>Polybenzimidazoles (PBIs) are Ionenes with the charged benzimidazole present in the polymeric backbone. PBIs are classified as cationic or anionic ionones based on their charge, and they exhibit outstanding thermomechanical properties. PBIs have been extensively employed as membranes for a range of complex gas and liquid separations, and so on. In this paper, we employ all-atom molecular dynamics simulations to explore the behavior of two different forms of polybenzimidazole polymers in salt-water mixtures. The two polymers, namely polybenzimidazolides (PBI) (anionic form) and polybenzimidazoliums (PBIm) (cationic form), were considered in two different water-mixed salts such as (a) Sodium chloride (NaCl) and (b) Calcium chloride (CaCl<sub>2</sub>). We report on the intramolecular and intermolecular structural and dynamic properties of PBI and PBIm in saltwater. Our findings indicate that the radius of gyration (R<sub>g</sub>) of both PBI and PBIm decreases as the concentrations of NaCl and CaCl<sub>2</sub> increase. Analysis of the dihedral angle distribution reveals that the gauche conformation predominates for both polymers in the water-salt mixtures. The radial distribution function analysis between the nitrogen and carbon atoms of the imidazole group on PBI and PBIm and the salt ions shows notable structural peaks. In contrast, PBI and PBIm exhibit relatively weak interactions with water molecules. The hydrogen bonding interactions between PBI and water are particularly significant and contribute to various structural changes observed. In summary, this paper offers a comprehensive atomic-level description of the structural transitions responsible for the conformational behaviors of both PBI and PBIm.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115128"},"PeriodicalIF":3.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388034","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}

引用次数: 0

Molecular simulation of CO2 adsorption behavior by different stratigraphic conditions in geological storage

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-03 DOI: 10.1016/j.comptc.2025.115126

Yong Lai

{"title":"Molecular simulation of CO2 adsorption behavior by different stratigraphic conditions in geological storage","authors":"Yong Lai","doi":"10.1016/j.comptc.2025.115126","DOIUrl":"10.1016/j.comptc.2025.115126","url":null,"abstract":"<div><div>CO<sub>2</sub> emissions and their contribution to global climate change become a critical issue. Geological storage of CO<sub>2</sub> in subterranean reservoirs, particularly in carbonate rocks, is one of the promising methods proposed to mitigate atmospheric CO<sub>2</sub> levels. The research specifically explores the molecular-level interactions of CO<sub>2</sub> with calcite, anorthite, and albite, which are key components of carbonate rock formations. Using a combination of Grand Canonical Monte Carlo (GCMC), molecular dynamics simulations (MDs), and density functional theory (DFT) methods, the study investigates CO<sub>2</sub> adsorption behaviors within the slit nanopores of these minerals under varying conditions. The findings demonstrate that anorthite exhibits the highest CO<sub>2</sub> adsorption capacity at lower pressures, although this advantage diminishes as pressure increases, leading to a more uniform adsorption capacity across the three minerals. The study also reveals that the presence of water significantly impairs CO<sub>2</sub> adsorption, with higher water content further reducing adsorption efficiency.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115126"},"PeriodicalIF":3.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143328312","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}

引用次数: 0

Exploring the impact of cyano substitutions in non-fullerene acceptors for enhanced organic solar cell performance: A DFT and TD-DFT investigation

IF 3 3区化学

Computational and Theoretical Chemistry Pub Date : 2025-02-03 DOI: 10.1016/j.comptc.2025.115102

Walid Taouali , Amel Azazi , Rym Hassani , Entesar H. EL-Araby , Kamel Alimi

{"title":"Exploring the impact of cyano substitutions in non-fullerene acceptors for enhanced organic solar cell performance: A DFT and TD-DFT investigation","authors":"Walid Taouali , Amel Azazi , Rym Hassani , Entesar H. EL-Araby , Kamel Alimi","doi":"10.1016/j.comptc.2025.115102","DOIUrl":"10.1016/j.comptc.2025.115102","url":null,"abstract":"<div><div>In this study, we designed four new non-fullerene acceptors (ANF1-ANF4) for organic photovoltaic cells derived from a well-known reference compound, Y15. The terminal acceptor of Y15 was modified by removing the chlorine atoms and adding a cyano group at four different positions. To explore the impact of the cynao group substitutions, we investigated the optoelectronic properties of the derived molecules using density functional theory (DFT) and time density functional theory (TD-DFT). We assessed several characteristics of the created compounds, including charge mobilities, molecular planarity parameters, molecular electrostatic potential, frontier molecular orbitals, transition density matrix, interfragment charge transfer (IFCT), and non-covalent interactions (NCI). Compared to the primary molecule Y15, we discovered that all tailored molecules have more planar geometries, a smaller energy gap ranging from 1.55 to 1.60 eV, and better optical properties with a maximum of absorption ranging from 759 nm to 796 nm in the chloroform phase. Moreover, we found that, except ANF4, all the other proposed molecules exhibit higher conductivity due to their lower reorganizational energy values compared to the reference molecule Y15. In particular, the investigation results showed that, given its promising optoelectronic and photovoltaic properties, ANF1 would be a great candidate for usage in the creation of high-performance organic solar cells.</div></div>","PeriodicalId":284,"journal":{"name":"Computational and Theoretical Chemistry","volume":"1246 ","pages":"Article 115102"},"PeriodicalIF":3.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349352","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}

引用次数: 0