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Cover Picture: Synthesis and computational studies for halide-free, neutral, and bifunctional one-component ferrocene-based catalysts for the coupling of carbon dioxide and epoxides (BKCS 10/2024) Jieun Lee, Wooram Lee, Yoseph Kim, Mujin Choi, Seol Ryu, Joonkyung Jang, Youngjo Kim 封面图片：用于二氧化碳与环氧化物偶联的无卤、中性和双功能单组分二茂铁基催化剂的合成与计算研究 (BKCS 10/2024) Jieun Lee, Wooram Lee, Yoseph Kim, Mujin Choi, Seol Ryu, Joonkyung Jang, Youngjo Kim
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-10-24 DOI: 10.1002/bkcs.12750
{"title":"Cover Picture: Synthesis and computational studies for halide-free, neutral, and bifunctional one-component ferrocene-based catalysts for the coupling of carbon dioxide and epoxides (BKCS 10/2024) Jieun Lee, Wooram Lee, Yoseph Kim, Mujin Choi, Seol Ryu, Joonkyung Jang, Youngjo Kim","authors":"","doi":"10.1002/bkcs.12750","DOIUrl":"https://doi.org/10.1002/bkcs.12750","url":null,"abstract":"<p>The cover image depicts the synthesis of cyclic carbonates from carbon dioxide and epoxides using a ferrocene-based catalyst in which two dimethylamino groups were introduced in the same Cp ring. The new catalyst does not need halide-based additives or tethered salts attached to ligands when used for this coupling reaction. More details are available in the article by Jienu Lee, Wooram Lee, Yoseph Kim, Mujin Choi, Seol Ryu, Joonkyung Jang, Youngjo Kim.\u0000\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12750","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142541096","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}
引用次数: 0
Cost-effective synthesis of unsymmetric tetrazines 经济高效地合成不对称四嗪
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-10-15 DOI: 10.1002/bkcs.12903
Jiwon Hwang, Byeongjip Yoon, Sung-Eun Suh
{"title":"Cost-effective synthesis of unsymmetric tetrazines","authors":"Jiwon Hwang,&nbsp;Byeongjip Yoon,&nbsp;Sung-Eun Suh","doi":"10.1002/bkcs.12903","DOIUrl":"https://doi.org/10.1002/bkcs.12903","url":null,"abstract":"<p>1,2,4,5-Tetrazines serve as versatile two-carbon synthons, essential for synthesizing a variety of (hetero)aromatic compounds. Their specific reactivity with certain dienophiles, without interfering with biochemical processes, makes them ideal for bioorthogonal ligation. Despite their broad utility, current synthetic methods are costly and raise safety concerns, particularly during scale-up. This study introduces safer and more cost-effective synthetic strategies utilizing zinc chloride or boron trifluoride diethyl etherate as catalysts. These alternatives significantly reduce costs and enhance safety, potentially expanding the applicability of tetrazine synthesis across broader research domains.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12903","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540868","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}
引用次数: 0
Moisture-resistant nitroaromatic explosive gas sensor based on hydrophilic pentiptycene polymer 基于亲水性戊二烯聚合物的防潮型硝基芳香族爆炸性气体传感器
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-10-08 DOI: 10.1002/bkcs.12902
Gyeongsoo Kim, Sun Bu Lee, Jaeyoung Heo, Tae Eun An, Gang Min Lee, Junggong Kim, Keunyoung Kim, Jongman Lee, Han Yong Bae, Changsik Song
{"title":"Moisture-resistant nitroaromatic explosive gas sensor based on hydrophilic pentiptycene polymer","authors":"Gyeongsoo Kim,&nbsp;Sun Bu Lee,&nbsp;Jaeyoung Heo,&nbsp;Tae Eun An,&nbsp;Gang Min Lee,&nbsp;Junggong Kim,&nbsp;Keunyoung Kim,&nbsp;Jongman Lee,&nbsp;Han Yong Bae,&nbsp;Changsik Song","doi":"10.1002/bkcs.12902","DOIUrl":"https://doi.org/10.1002/bkcs.12902","url":null,"abstract":"<p>The detection of explosive materials, particularly nitroaromatic compounds such as 2,4,6-trinitrotoluene (TNT), is critical for public safety and national security. Existing detection methods often require complex instrumentation, limiting their applicability for real-time or in-field use. Fluorescent sensors, which offer rapid and sensitive detection through fluorescence quenching, present a promising alternative. This study evaluates the performance of two pentiptycene-based polymers, P-1 and P-2, in detecting explosive vapors, with a specific focus on their behavior under high-humidity conditions. P-2, modified with triethylene glycol groups, demonstrated significantly increased hydrophilicity compared to the commonly studied P-1, as confirmed by contact angle measurements. Spectroscopic analysis revealed a blue shift in P-2's UV–Vis absorption and photoluminescence spectra, indicating electronic property changes due to structural modifications. The enhanced hydrophilicity of P-2 enabled it to maintain stable sensing performance under moist conditions, showing less than a 10% reduction in sensitivity, compared to the 20% decrease observed in P-1. This superior moisture resistance suggests that P-2 is a more robust and practical sensor for explosive detection in environments with variable humidity levels.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540921","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}
引用次数: 0
Synthesis and computational studies for halide-free, neutral, and bifunctional one-component ferrocene-based catalysts for the coupling of carbon dioxide and epoxides 用于二氧化碳与环氧化物偶联的无卤、中性和双功能单组分二茂铁基催化剂的合成与计算研究
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-26 DOI: 10.1002/bkcs.12901
Jieun Lee, Wooram Lee, Yoseph Kim, Mujin Choi, Seol Ryu, Joonkyung Jang, Youngjo Kim
{"title":"Synthesis and computational studies for halide-free, neutral, and bifunctional one-component ferrocene-based catalysts for the coupling of carbon dioxide and epoxides","authors":"Jieun Lee,&nbsp;Wooram Lee,&nbsp;Yoseph Kim,&nbsp;Mujin Choi,&nbsp;Seol Ryu,&nbsp;Joonkyung Jang,&nbsp;Youngjo Kim","doi":"10.1002/bkcs.12901","DOIUrl":"https://doi.org/10.1002/bkcs.12901","url":null,"abstract":"<p>We used stable and nontoxic [(dimethylamino)methyl]ferrocene (<b>Fc-N</b>), (hydroxymethyl)ferrocene (<b>Fc-O</b>), 1,2-bis[(dimethylamino)methyl]ferrocene (<b>Fc-N2</b>), and 1-[(dimethylamino)methyl]-2-(hydroxymethyl)ferrocene (<b>Fc-NO</b>) as halide-free, neutral, and bifunctional one-component catalysts for the synthesis of cyclic carbonates. They do not need halide-based additives or tethered salts attached to ligands when used for this coupling reaction. Among them, <b>Fc-N2</b> exhibited the best catalytic activity under the same reaction conditions. Catalytic activity decreased rapidly in the order <b>Fc-N2</b> &gt; <b>Fc-NO</b> &gt; <b>Fc-N</b> &gt; <b>Fc-O</b>, and interestingly, the more amino groups introduced into the Cp groups, the higher the activity. Various terminal and internal epoxides were easily converted into the corresponding cyclic carbonates. Calculations based on the density functional theory were also carried out to elucidate the mechanism of the coupling reaction.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142541055","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}
引用次数: 0
EPR spectroscopy: A versatile tool for exploring transition metal complexes in organometallic and bioinorganic chemistry EPR 光谱：探索有机金属和生物无机化学中过渡金属配合物的多功能工具
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-25 DOI: 10.1002/bkcs.12899
Minyoung Ju, Jin Kim, Jeongcheol Shin
{"title":"EPR spectroscopy: A versatile tool for exploring transition metal complexes in organometallic and bioinorganic chemistry","authors":"Minyoung Ju,&nbsp;Jin Kim,&nbsp;Jeongcheol Shin","doi":"10.1002/bkcs.12899","DOIUrl":"https://doi.org/10.1002/bkcs.12899","url":null,"abstract":"<p>Paramagnetic molecules, such as main-group radicals and transition metal complexes, play crucial roles in catalytic and enzymatic reactions in organometallic and bioinorganic chemistry. Electron paramagnetic resonance (EPR) spectroscopy emerges as a powerful tool for probing the intricate electronic and geometric structures of these molecules. The application of EPR spectroscopy spans a wide spectrum of chemical entities, from simple radicals to transition metal complexes, metalloproteins, and metal clusters, emphasizing its versatility across various fields of chemistry. This review introduces the EPR spectra of transition metal complexes, offering a comprehensive theoretical foundation along with illustrative examples from both bioinorganic and organometallic chemistry. These examples highlight the effectiveness of EPR spectroscopy in characterizing transition metal complexes, reinforcing our understanding of their structure and reactivity.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12899","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540934","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}
引用次数: 0
Cover Picture: Novel low-band gap non-fullerene acceptors based on IDIC core as potential photovoltaic materials (BKCS 9/2024) Radhiha Ravindran, Inchan Kim, Yun-Hi Kim, Soon-Ki Kwon 封面图片：基于 IDIC 核的新型低带隙非富勒烯受体作为潜在的光伏材料 (BKCS 9/2024) Radhiha Ravindran、Inchan Kim、Yun-Hi Kim、Soon-Ki Kwon
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-23 DOI: 10.1002/bkcs.12747
{"title":"Cover Picture: Novel low-band gap non-fullerene acceptors based on IDIC core as potential photovoltaic materials (BKCS 9/2024) Radhiha Ravindran, Inchan Kim, Yun-Hi Kim, Soon-Ki Kwon","authors":"","doi":"10.1002/bkcs.12747","DOIUrl":"https://doi.org/10.1002/bkcs.12747","url":null,"abstract":"<p>Organic photovoltaics (OPVs) attracted a lot of research attention owing to its advantages such as convenient processing technique, unsubstantial weight, low cost, flexibility and use of environmentally benign materials. In general, these are bulk heterojunction (BHJ) OPVs obtained through a solution process and the large-area OPV production is achieved via roll-to-roll process. In OPVs, the BHJ active layer consists of electron donor (D) and electron acceptor (A) materials blended together by dissolving them in a common organic solvent. The new low band gap non-fullerene based acceptors could be used as potential candidates for the fabrication of OPVs in combination with suitable donor polymers. More details are available in the article by Radhiha Ravindran, Inchan Kim, Yun-Hi Kim, Soon-Ki Kwon\u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12747","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313275","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}
引用次数: 0
Interfacial challenges and recent advances of solid-state lithium metal batteries 固态锂金属电池的界面挑战和最新进展
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-22 DOI: 10.1002/bkcs.12900
Wooyoung Jeong, Jonghyeok Yun, Jong-Won Lee
{"title":"Interfacial challenges and recent advances of solid-state lithium metal batteries","authors":"Wooyoung Jeong,&nbsp;Jonghyeok Yun,&nbsp;Jong-Won Lee","doi":"10.1002/bkcs.12900","DOIUrl":"https://doi.org/10.1002/bkcs.12900","url":null,"abstract":"<p>Growing market demands on portable electronics, electric vehicles, and energy storage system calls for the development of high-energy density lithium (Li) batteries. Li metal is considered as a promising anode material owing to their high capacity and low electrochemical potential. However, high reactivity of Li metal with conventional flammable liquid electrolytes easily forms Li dendrites, which may cause short-circuit and even catching fire, obstructing the wide application of Li metal batteries. Although non−/less-flammable solid electrolytes have replaced the conventional liquid electrolytes, solid-state Li metal batteries (SSLMBs) suffer from lower Li<sup>+</sup> conductivities, chemical/electrochemical incompatibilities toward Li metal, and inhomogeneous Li<sup>+</sup> flux at the interfaces. Therefore, many researchers have devoted themselves to solve these problems. For a better understanding on the current issues and recent advances, this article provides (1) a review on various solid electrolytes with high Li<sup>+</sup> conductivity and their interfacial issues in SSLMBs, and (2) recent progress in stabilization of the interface between the Li node and solid electrolytes, including an electrolyte modification (e.g., composition, additives) and introduction of an interlayer.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12900","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142541089","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}
引用次数: 0
Photochemical coupling reaction of phenacyl benzoate with acetone to form 1,4-dicarbonyl compound enabled by charge transfer 苯甲酸苯乙酯与丙酮的光化学偶联反应，通过电荷转移生成 1,4-二羰基化合物
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-16 DOI: 10.1002/bkcs.12898
Ho Suk Shin, Bong Ser Park
{"title":"Photochemical coupling reaction of phenacyl benzoate with acetone to form 1,4-dicarbonyl compound enabled by charge transfer","authors":"Ho Suk Shin,&nbsp;Bong Ser Park","doi":"10.1002/bkcs.12898","DOIUrl":"https://doi.org/10.1002/bkcs.12898","url":null,"abstract":"<p>Photolysis of phenacyl benzoates tethered with a phenol or anisole in acetone resulted in the formation of 1,4-dicarbonyl compounds, coupling products of the phenacyl moiety with acetone. The reaction occurs via electron and/or proton transfer from a triplet exciplex, leading to the formation of a phenacyl radical, which then adds to the enol form of acetone. The reaction also occurs in intermolecular fashion with external electron donors.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540912","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}
引用次数: 0
A novel thiourea-based fluorescent turn-on sensor for rapidly detecting hypochlorite through a desulfurization reaction 通过脱硫反应快速检测次氯酸盐的新型硫脲基荧光导通传感器
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-04 DOI: 10.1002/bkcs.12897
Boeun Choi, Soyeon Kim, Cheal Kim
{"title":"A novel thiourea-based fluorescent turn-on sensor for rapidly detecting hypochlorite through a desulfurization reaction","authors":"Boeun Choi,&nbsp;Soyeon Kim,&nbsp;Cheal Kim","doi":"10.1002/bkcs.12897","DOIUrl":"https://doi.org/10.1002/bkcs.12897","url":null,"abstract":"<p>Excess hypochlorite (ClO<sup>−</sup>) is harmful to living organisms and can cause various oxidative diseases in the human body. Owing to the toxicity of ClO<sup>−</sup>, the development of efficient fluorescence sensors to track ClO<sup>−</sup> is necessary. In this work, we report a novel thiourea-based fluorescent turn-on sensor 1-(9-ethyl-9<i>H</i>-carbazol-3-yl)-3-(naphthalen-1-yl)thiourea (<b>ECNT</b>) for recognizing ClO<sup>−</sup>. <b>ECNT</b> can detect ClO<sup>−</sup> with high selectivity, relatively low interference with other analytes, and a significantly fast response time (&lt;1 s) through a desulfurization reaction. The detection limit of <b>ECNT</b> for ClO<sup>−</sup> is calculated as 5.59 μM. Of note, <b>ECNT</b> is a chemosensor that reacts the fastest with ClO<sup>−</sup> among the reported thiourea-based fluorescence turn-on sensors for detecting ClO<sup>−</sup>. The response mechanism of <b>ECNT</b> to ClO<sup>−</sup> is demonstrated through <sup>1</sup>H NMR titration, ESI mass, and density functional theory calculations.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313334","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}
引用次数: 0
Recent progress in visible light-driven halogenation: Chlorination, bromination, and iodination 可见光驱动卤化的最新进展：氯化、溴化和碘化
IF 1.7 4区 化学
Bulletin of the Korean Chemical Society Pub Date : 2024-09-03 DOI: 10.1002/bkcs.12896
Anh Thu Nguyen, Houng Kang, Truong Giang Luu, Sung-Eun Suh, Hee-Kwon Kim
{"title":"Recent progress in visible light-driven halogenation: Chlorination, bromination, and iodination","authors":"Anh Thu Nguyen,&nbsp;Houng Kang,&nbsp;Truong Giang Luu,&nbsp;Sung-Eun Suh,&nbsp;Hee-Kwon Kim","doi":"10.1002/bkcs.12896","DOIUrl":"https://doi.org/10.1002/bkcs.12896","url":null,"abstract":"<p>Halogenation is one of the most important transformations in organic synthesis. Halogenated compounds are employed in many reactions to prepare useful molecules. Many methods have been developed to introduce halogens into different compounds. Visible light-mediated reactions are the efficient, low-toxic, and mild-condition methods applied for various organic chemistry transformations. Remarkably, there has been an increasing development in the application of visible light-induced halogenation in recent years. Herein, we present a comprehensive summary of halogenation reactions including chlorination, bromination, and iodination under visible light irradiation since 2020.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313287","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}
引用次数: 0
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