Coordination Chemistry Reviews最新文献

{"title":"Recent advances in synthesis and biomedical applications of structurally chiral plasmonic nanomaterials","authors":"Lichao Sun ,&nbsp;Yichen Zhang ,&nbsp;Zixuan Yang ,&nbsp;Yi Zhang ,&nbsp;Qi Dong ,&nbsp;Zhaowei Zhang ,&nbsp;Qingfeng Zhang","doi":"10.1016/j.ccr.2026.217660","DOIUrl":"10.1016/j.ccr.2026.217660","url":null,"abstract":"<div><div>Understanding the biological effects of chiral nanomaterials holds much significance for chirality-dependent biomedical applications. In particular, structurally chiral plasmonic nanomaterials are gaining increasing attention due to their unique structure-dependent chiroptical properties, which arise from the integration of plasmonic characteristics with geometric chirality. Recent advances in controlling the geometry and chiroptical activities of chiral plasmonic nanostructures are opening new avenues for their integration into biomedical applications. The chirality-dependent functionality of chiral plasmonic nanomaterials could originate from strong chiral light-matter couplings or enantioselective interactions at chiral interfaces, enabling sensitive biosensing and high-performance therapeutic interventions. Thus, this review provides an overview of controllable synthesis of chiral plasmonic nanomaterials and biomedical applications for chirality-dependent enantioselective recognition, biosensing, and therapeutic interventions. We focus on the recent developments in the controllable synthesis of chiral plasmonic nanomaterials, especially on those with intrinsically structural chirality. Furthermore, the emerging biomedical applications of chiral plasmonic nanomaterials, along with their main challenges and future research directions, are discussed. We anticipate that these studies would provide new insights into the interaction between artificial chiral materials and biological systems.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217660"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive analysis of advanced stable anode electrocatalysts for proton exchange membrane water electrolyzer","authors":"Xinyi Long ,&nbsp;Zhelin Mao ,&nbsp;Yaohong He ,&nbsp;Haisheng Zhang ,&nbsp;Mingze Li ,&nbsp;Haijing Yan ,&nbsp;Yu Fu","doi":"10.1016/j.ccr.2026.217657","DOIUrl":"10.1016/j.ccr.2026.217657","url":null,"abstract":"<div><div>Proton exchange membrane water electrolysis (PEMWE) demonstrates significant potential for renewable hydrogen production. However, its large-scale application remains limited by the durability challenges of core components such as catalysts, membrane electrode assemblies (MEAs) and bipolar plates (BPPs) under acidic and high potential conditions. While substantial progress has been achieved in electrocatalyst design, synthesis, and mechanistic understanding, the persistent activity-stability trade-off continues to hinder PEMWE industrialization. Therefore, this review systematically summarizes recent advances in high-performance electrocatalysts and device optimization for PEMWE, examining the mechanisms of the acidic oxygen evolution reaction (OER) and their intrinsic connections, and analyzing multifaceted degradation behaviors within PEMWE electrolyzers and in situ characterization techniques for elucidating decay pathways. Furthermore, it discusses strategies for enhancing catalyst performance and durability, including morphology engineering, doping, interfacial engineering, and surface dynamic reconstruction. The coverage extends beyond materials to device optimization, encompassing MEA, BPPs design, and extending to stack structural design, balance of plant (BOP) integration. A comprehensive analysis of the full life-cycle costs of each component is further explored. Finally, concluding with an outlook on unresolved challenges, this review aims to deliver multidimensional design guidelines for developing high-efficiency, stable PEMWE systems and provide actionable insights for clean energy infrastructure development.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217657"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced organic thermoelectric materials: from fundamentals to applications","authors":"Jiajia Zhang ,&nbsp;Qikai Li ,&nbsp;Fangyi Sun ,&nbsp;Zhijun Chen ,&nbsp;Xuefeng Guo ,&nbsp;Weishu Liu","doi":"10.1016/j.ccr.2026.217639","DOIUrl":"10.1016/j.ccr.2026.217639","url":null,"abstract":"<div><div>Organic thermoelectric (TE) materials have attracted significant attention because of their mechanical flexibility, lightweight, and large-scale solution processability, resulting in considerable progress over the past 20 years. In this review, we present a comprehensive and timely survey of organic TE materials, focusing on their molecular structure, charge transport mechanisms, and material-level optimization strategies. We further highlight their promising applications, including power generation, active cooling, temperature sensing, and photothermal sensing. Despite these advances, the TE figure of merit (<em>ZT</em>) obtained for organic TE materials still lags behind that of inorganic TE materials. Therefore, this review also critically examines the underlying challenges contributing to the low <em>ZT</em> values in organic systems. Finally, we provide a forward-looking perspective on future research directions to enhance the performance of organic TE materials.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217639"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coordination engineering of single atom catalysts for lithium-sulfur batteries: from local structure design to catalytic mechanisms","authors":"Shupeng Zhao ,&nbsp;Chuyin Ma ,&nbsp;Yue Yu ,&nbsp;Jiayi Wang ,&nbsp;Jiawen Chen ,&nbsp;Lin Yang ,&nbsp;Xin Wang ,&nbsp;Mingliang Jin ,&nbsp;Zhongwei Chen","doi":"10.1016/j.ccr.2026.217664","DOIUrl":"10.1016/j.ccr.2026.217664","url":null,"abstract":"<div><div>Single-atom catalysts (SACs) have emerged as powerful electrocatalysts to accelerate sulfur redox kinetics in lithium‑sulfur (Li-S) batteries, owing to their maximized atomic utilization and tunable electronic properties. From the perspective of coordination chemistry, this review conceptualizes SAC sites as coordination complexes, systematically outlining how their coordination number, ligand type, local symmetry, and ligand-field strength dictate the metal valence state, spin state, and frontier orbital configuration, thereby governing polysulfide adsorption, activation barriers, and multi-electron conversion pathways. We organize the literature into four coordination-focused families—(i) classical M-N₄ configurations, (ii) non-M-N₄ coordination architectures (e.g., M-N₂, M-N₃, M-N₅), (iii) heteroatom-coordinated structures (e.g., M-N_mX_n, where X = O, S, Cl, P, etc.), and (iv) dual-atom catalysts. For each category, we analyze the structure-activity relationships and the underlying mechanisms that govern polysulfide adsorption, activation, and conversion. Finally, we outline current challenges and propose future directions toward the rational design and scalable synthesis of SACs with optimized coordination structures. This coordination-centric review aims to bridge molecular coordination chemistry and electrocatalysis by providing targeted, predictive guidelines for next-generation Li-S catalyst design.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217664"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mo-polydopamine hierarchical polymer-metal coordination complex from 2D-nanopetal to micro-flowers; synthesis, morphology and recent applications","authors":"A. Taheri Ostad ,&nbsp;S. Najafi-Shoa ,&nbsp;B. Ramezanzadeh ,&nbsp;H. Eivaz Mohammadloo","doi":"10.1016/j.ccr.2026.217609","DOIUrl":"10.1016/j.ccr.2026.217609","url":null,"abstract":"<div><div>Molybdenum-polydopamine (Mo-PDA) coordination architectures with hierarchical “flower-like” morphologies have emerged as a versatile class of hybrid nanomaterials that couple molybdenum's redox and coordination chemistry with polydopamine's adhesive, functionalizable polycatechol scaffold. In this critical review, the structural, synthetic, and application-oriented literature is synthesized to identify reproducible structure-property relationships and persistent gaps that limit translation. Prevailing synthesis strategies—including hydrothermal, solvothermal, in-situ polymerization, and green biomimetic routes—are classified and analyzed to elucidate how nucleation and growth variables (precursor stoichiometry, pH, temperature, solvent polarity, and templating agents) deterministically govern hierarchical morphology, porosity, and accessible surface area. Advanced characterization methods that reveal coordination motifs, oxidation states, and pore architecture (electron microscopy, X-ray, and spectroscopies) are evaluated, linking these descriptors to functional metrics. In a comparative assessment of photocatalysis, pollutant adsorption/water purification, and biomedical delivery/antimicrobial applications, reported performance advantages are critically examined in the context of heterogeneous evaluation practices that currently limit cross-study interpretability. Key bottlenecks (including scalability, reproducibility, precise morphological control, and mechanistic insight under operating conditions) are identified, and a guiding framework for the consistent use of application-relevant performance descriptors, together with multi-scale modeling and targeted functionalization strategies, is articulated to support more predictive, design-oriented development. This review aims to move the field beyond largely descriptive reports toward an evidence-informed, application-oriented interpretative framework for Mo-PDA hybrids.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217609"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon–carbon bonded BODIPY dimers: Structural classification, photophysical mechanisms, and functional applications","authors":"Ru Feng,&nbsp;Zhaoli Xue,&nbsp;Songlin Xue,&nbsp;Yue Wang","doi":"10.1016/j.ccr.2026.217674","DOIUrl":"10.1016/j.ccr.2026.217674","url":null,"abstract":"<div><div>Covalently bonded BODIPY dimers have emerged as a versatile class of multichromophoric systems that exhibit rich structural diversity and highly tunable photophysical and photochemical properties. By coupling two BODIPY units through distinct linkage topologies, these dimers provide a unique platform for modulating electronic coupling, excited-state dynamics, and functional performance without relying on heavy atoms. This review presents a comprehensive and critical overview of single-bonded and π-fused BODIPY dimers, systematically classified according to their linkage modes, including α–α, α–β, α–γ, β–β, β–γ, meso-involving, γ–γ, and π-fused architectures. Beyond a structural taxonomy, we emphasize a unified structure–function paradigm, highlighting how linkage topology governs dihedral angle and interchromophoric electronic coupling, thereby dictating key excited-state pathways such as exciton splitting, intramolecular charge transfer (ICT), and spin–orbit charge-transfer intersystem crossing (SOCT-ISC). These mechanistic features directly translate into distinct performance advantages across applications, including photodynamic therapy, near-infrared fluorescence imaging, photoacoustic imaging, photocatalysis, and organic photovoltaics. Representative examples are discussed to illustrate how orthogonal single-bond dimers favor efficient triplet-state formation and reactive oxygen species generation, whereas π-fused dimers exhibit enhanced near-infrared absorption and non-radiative energy dissipation. By integrating molecular structure, photophysical mechanism, and application outcome, this review provides rational design guidelines for next-generation BODIPY dimers tailored to specific photonic and biomedical functions.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217674"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MOF@metal-sulfide: Revolutionizing hybrid materials from structural engineering to advanced energy and environmental applications","authors":"Pallabi Borah,&nbsp;Pranjit Borah,&nbsp;Md. Ahmaruzzaman","doi":"10.1016/j.ccr.2026.217688","DOIUrl":"10.1016/j.ccr.2026.217688","url":null,"abstract":"<div><div>The expanding issues of environmental contamination and worldwide energy consumption highlight the importance of innovative materials for efficient energy conversion, storage, and cleanup. Metal-organic frameworks (MOFs) and metal sulfides have emerged as intriguing possibilities; nevertheless, their individual limitations—such as poor conductivity and stability in MOFs and limited cycling endurance in metal sulfides—limit their practical uses. MOF@Metal-Sulfide composites provide a potent solution by combining the high porosity, adjustable structure, and huge surface area of MOFs with the better electrical conductivity and catalytic activity of sulfides. This review provides a thorough examination of these hybrid materials, including their structural architectures (core-shell, hollow, porous, and yolk-shell), composition-dependent types, and various synthetic strategies, such as in situ growth, sulphurization, deposition, and MOF-derivative pathways. The main characterization techniques used to investigate their structural, optical, and electrical properties are summarized. The mechanisms influencing their performance in photocatalytic water splitting, electrocatalytic HER/OER/ORR, alkali-ion batteries, and supercapacitors are thoroughly investigated. Finally, the various applications of MOF@Metal-Sulfide composites are discussed, including environmental cleanup, energy storage, electrocatalysis, gas detection, and electromagnetic wave absorption. This assessment is intended to help guide the development of next-generation multifunctional materials for sustainable energy and environmental technologies.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217688"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal nanocomposites for biosensing amyloid beta peptides: Advancing point-of-care diagnostics in Alzheimer's disease","authors":"Bharathi Natarajan ,&nbsp;Qiang Zhou ,&nbsp;Govindhan Maduraiveeran ,&nbsp;Palanisamy Kannan","doi":"10.1016/j.ccr.2026.217682","DOIUrl":"10.1016/j.ccr.2026.217682","url":null,"abstract":"<div><div>Amyloid beta peptides (Aβps) are crucial biomarkers for Alzheimer's disease (AD), and their early detection plays a critical role in enhancing therapeutic efficacy. Electrochemical biosensor-based point-of-care (POC) diagnostics have gained prominence as effective tools for the sensitive and selective detection of Aβps, offering benefits such as rapid detection, portability, and cost-efficiency. This review highlights recent developments in electrochemical POC diagnostics platforms for Aβps sensing and monitoring, with a focus on coordination chemistry principles. Specifically, the review explores surface functionalization strategies, metal-ligand interactions, charge-transfer mechanisms, and redox-active centers that drive the performance of various nanostructured materials in Aβps biosensors. These materials include self-assembled nanostructures, metal nanoparticles (MNPs), polymer nanocomposites, carbon nanocomposites, metal-organic frameworks (MOFs), each contributing to improved sensitivity, stability, selectivity, and detection limits in various clinical samples. The review critically evaluates the integration of these chemistry-based features in enhancing sensor performance, particularly in terms of selective targeting of Aβps and the optimization of biosensing mechanisms for real-time detection. Furthermore, the review explores the integration of these platforms into practical AD diagnosis systems, emphasizing their potential for real-time and highly sensitive monitoring of AD biomarkers. Despite significant progress, challenges remain, particularly in terms of long-term stability, degradation of bioreceptors, variations in fabrication processes, scalability, and integration with existing clinical workflows. The review concludes by outlining these challenges and suggesting future directions for electrochemical biosensing platforms, with a focus on their potential for clinical integration and POC diagnostics in AD monitoring therapeutic applications.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"556 ","pages":"Article 217682"},"PeriodicalIF":23.5,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering cellulose-based hybrid materials for radionuclide sequestration: coordination mechanisms, challenges, and machine learning perspectives","authors":"Venkata Subbaiah Munagapati ,&nbsp;Gutha Yuvaraja ,&nbsp;Vijaya Yarramuthi ,&nbsp;Sada Venkateswarlu ,&nbsp;Jet-Chau Wen ,&nbsp;Sambasivam Sangaraju ,&nbsp;Kun-Yi Andrew Lin ,&nbsp;Shiang-Huei Kung ,&nbsp;K. Keerthi ,&nbsp;N.V.V. Jyothi","doi":"10.1016/j.ccr.2026.217646","DOIUrl":"10.1016/j.ccr.2026.217646","url":null,"abstract":"<div><div>Radionuclide contamination in the environment is a serious threat. Cellulose and its derivatives have gained significant attention as sustainable materials for treating contaminated water. Their surface chemistry, rich in coordination sites (-OH, -COOH, -NH₂), porosity, and ease of functionalization enable the development of advanced cellulose-based composites (like metal organic frameworks (MOFs), graphene, MXenes, metal oxide nanoparticles, and polymer moieties) with high surface area, and selectivity toward radionuclides like uranium (U), thorium (Th), barium (Ba), cesium (Cs), and iodine (I). This review emphasizes the structural fundamentals of cellulose, the environmental significance of radionuclide contamination, and the diverse synthesis approaches used to engineer functional composites. The mechanisms governing radionuclide removal, including ion exchange, surface complexation, electrostatic interactions, and redox-mediated capture, and the influence of key operational parameters, are systematically reviewed. Comprehensive characterization techniques are presented to evaluate the structural, chemical, and surface properties of the material before and after radionuclide sequestration. Density Functional Theory (DFT) studies are also used to provide molecular-level insights into binding energies, preferred adsorption sites, and interaction modes between radionuclides and functional groups. Machine learning (ML) algorithms, such as artificial neural networks (ANNs) and random forests (RFs), are used to predict adsorption capacities and identify key variables that influence performance. These data-driven approaches reduce experimental effort and guide the rational design of next-generation radionuclide adsorbents. Interestingly, this review also emphasizes cellulose-based radionuclide composites for theranostic applications. Collectively, cellulose-based composites, DFT insights, and ML-driven optimization represent a promising pathway for sustainable radionuclide remediation and future biomedical applications.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"555 ","pages":"Article 217646"},"PeriodicalIF":23.5,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146109837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advantages and challenges of covalent organic frameworks for triboelectric nanogenerator materials","authors":"Weibing Liu ,&nbsp;Zhichao Shao ,&nbsp;Xueyou Wang ,&nbsp;Yuchen Liu ,&nbsp;Long Li ,&nbsp;Yi Wei","doi":"10.1016/j.ccr.2026.217662","DOIUrl":"10.1016/j.ccr.2026.217662","url":null,"abstract":"<div><div>Recently, Covalent Organic Frameworks (COFs) have garnered significant attention from researchers due to their advantages, including a high specific surface area, a tunable pore structure and excellent chemical stability. The merits and disadvantages of COFs based on Triboelectric Nanogenerators (TENGs) were examined in this work, along with discussions of continuous optimization design strategies, which include three main elements: metal-enhanced strategies, molecular polarization strategies and charge-induction strategies. This work went further with the use of COFs based on TENG in three areas: self-powered catalysis, self-powered sensing and self-powered corrosion. Along with examined the development prospects of potential future research directions like molecular engineering and structural innovation optimization, it also offered a thorough analysis of the challenges currently facing material design and mechanical performance limitations. The goal was to advance the practical uses of TENGs by providing guidance for the design of innovative COF material structures.</div></div>","PeriodicalId":289,"journal":{"name":"Coordination Chemistry Reviews","volume":"555 ","pages":"Article 217662"},"PeriodicalIF":23.5,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146109836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}