Dalton Transactions最新文献

{"title":"Water-soluble luminescent platinum(II) complexes for guanine quadruplex binding","authors":"Simon Kroos, Marian Hebenbrock, Alexander Hepp, Marcus Layh, Joschua Lüke, Ali Riza Tonkul, Cristian A. Strassert, Jens Müller","doi":"10.1039/d4dt03067b","DOIUrl":"https://doi.org/10.1039/d4dt03067b","url":null,"abstract":"A family of 16 platinum(II) complexes was synthesized with the aim of obtaining water-soluble luminescent complexes for guanine quadruplex (G4) binding. The complexes share a common tridentate N^N^C-donor ligand (based on 2-phenyl-6-(1<em>H</em>-1,2,3-triazol-4-yl)pyridine) bearing different substituents for solubilization, and an additional monodentate ancillary ligand (either phenylacetylide or 3-(trimethylammonium)prop-1-yne-1-ide). Single-crystal X-ray diffraction analyses confirm that the substituents do not interfere with the central planar core of the complexes required for π stacking interactions with the DNA. The interaction of the complexes with four DNA oligonucleotides that fold into various G4 topologies was evaluated using luminescence and circular dichroism spectroscopy as well as cryo-ESI mass spectrometry. The data indicate a complex correlation between type of substituent and ability of the complex to interact with G4 DNA.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"28 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506769","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":"C–C and C–O Bond Formation Reactivity of Nickel Complexes Supported by the Pyridinophane MeN3C Ligand","authors":"Joshua Ji-Nung Leung, Dae Young Bae, Yusuff Moshood, Liviu M. Mirica","doi":"10.1039/d5dt00135h","DOIUrl":"https://doi.org/10.1039/d5dt00135h","url":null,"abstract":"The pyridinophane ligands <small>^R</small>N3CX (X = H, Br) are well-established scaffolds that facilitate and stabilize nickel oxidative addition complexes to the proximal C(aryl)–X bond. In this study, we report the synthesis, detailed characterization, and reactivity of a series of Ni<small>^II</small> and Ni<small>^III</small> complexes supported by the <small>^Me</small>N3CX ligand. Our findings demonstrate that Ni<small>^II</small> complexes can be oxidized to readily yield well-defined Ni<small>^III</small> species. Excitingly, the Ni-disolvento complexes exhibit catalytic trifluoroethoxylation to generate the C–O coupled product. In addition, the NiIII-halide complex undergoes transmetallation with a Grignard reagent and subsequent C–C reductive elimination, while the β-hydride elimination side reaction is suppressed, outperforming its Ni<small>^II</small> analogue.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"24 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495747","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":"Tuning Charge Transportation Balance in Quantum Dot Light Emitting Diodes by Decreasing the Mobility and Conductivity of In-DopedSnO2Nanocrystal Electron Transport Layer","authors":"Chen Lin, Mengxin Liu, Yuhui Liu, Xinan Shi, Daocheng Pan","doi":"10.1039/d5dt00211g","DOIUrl":"https://doi.org/10.1039/d5dt00211g","url":null,"abstract":"The use of quantum sized SnO₂ nanocrystals as the electron transportation layer (ETL) in quantum dot light-emitting diodes (QLEDs) has been demonstrated to be an effective method for improving device stability and eliminating the positive aging effect. However, compared to commonly used 4,4’-Bis(N-carbazolyl)-1,1’-biphenyl (CBP) hole transportation layer (HTL), the quantum sized SnO₂ nanocrystals usually possess a higher electron mobility and a higher conductivity, which results in the charge transport imbalance in QLEDs. Herein, In-doped SnO₂ quantum-sized nanocrystals are synthesized by the ligands-assisted solvothermal method. It was found that the mobility and conductivity of N-type In-doped SnO2 nanocrystals gradually decrease with increasing In doping concentration owing to the substitution of In3+ ions for Sn4+ ions as the electron acceptors. As a result, the charge transportation balance in QLED is realized by suppressing electron transportation ability of In-doped SnO₂ nanocrystals. A red inverted QLED based on 5 wt% In-doped SnO2 nanocrystal ETL exhibits a maximum luminance of 68,033 cd m-2, a current efficiency (CE) of 26.52 cd A-1 and an external quantum efficiency (EQE) of 18.94%. These results reveal that In-doped SnO2 nanocrystals are a promising candidate for fabricating high-performance and stable QLEDs.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495750","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":"Benzimidazole-based mononuclear polypyridyl Cu(II) complexes towards DNA binding, cleavage, and in vitro antiproliferative studies","authors":"Indrajit Roy, Shobhit Mathur, Sourav Deb, Sharan Shanmuga Vuppaladadium Rathnam, Nikhil Tuti, Unnikrishnan Paruthiyezhath Shaji, L. Karthikeyan, Anindya Roy, Somnath Maji","doi":"10.1039/d4dt03379e","DOIUrl":"https://doi.org/10.1039/d4dt03379e","url":null,"abstract":"This paper addresses the synthesis, characterization, DNA binding, cleavage, and in vitro antiproliferative activity studies of a series of heteroleptic mononuclear copper(II) complexes[Cu(L)(bpy)](ClO4)2;{1},[Cu(L)(phen)](ClO4)2;{2}, and[Cu(L)(Mephen)](ClO4)2;{3}derived from different polypyridyl ligands where in the complex architecture, one 2,6-bis(1-methyl-1H-benzo[d]imidazol-2-yl)pyridine(Mebzimpy) (L) moiety is connected to central Cu metal as tridentate fashion whereas the bidentate co-ligand are 2,2/-bipyridine (bpy), 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (MePhen). All the synthesized complexes were characterized using various spectroscopic and analytical methods, along with the single-crystal X-ray diffraction (SCXRD) technique. Complexes crystallize as a penta-coordinated distorted square pyramidal geometry. The redox properties of the complexes were also studied by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The DNA binding nature of the complexes was investigated utilizing absorbance spectral measurement and fluorescence quenching experiments with ethidium bromide (EB) as a DNA intercalator, employing double-stranded salmon sperm DNA (ss-DNA). Both the binding constant (Kb) and the Stern-Volmer constant (KSV) were found in 104 orders. In silico molecular docking, analysis confirmed that all the complexes could interact with the minor groove of duplex DNA. The DNA cleaving ability of the complexes was studied by gel electrophoresis using supercoiled plasmid DNA; however, no DNA cleavage was found. DNA-binding polypyridyl complexes were well known to disrupt DNA metabolic pathways and cause cytotoxicity to rapidly growing cancer cells. Hence, cell viability analysis was also carried out with complexes 13. It was observed that complexes 2 and 3 prevented the proliferation of human osteosarcoma cell line U2OS and triple-negative breast cancer cell line MDA-MB-231. Overall, these findings could be beneficial in the design and development of future antitumor agents.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"27 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495799","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":"Terahertz bands multifunctional metamaterial transmission-absorption switching device based on vanadium dioxide","authors":"Xinmei Wang, Xianding He, Chaojun Tang, Bin Shui, Zao Yi","doi":"10.1039/d5dt00153f","DOIUrl":"https://doi.org/10.1039/d5dt00153f","url":null,"abstract":"In this paper, a vanadium dioxide (VO2)-based terahertz device is proposed to realize the conversion between broadband absorption and broadband transmission functions, including VO2 bottom layer, dielectric layer and VO2 pattern layer in a three-layer structure. With the change of VO2 conductivity, the terahertz metamaterial device can switch between broadband absorption and broadband transmission. When the device exhibits broadband transmission, it has a high transmittance of 90% for terahertz waves in the 5.6 THz to 8.7 THz frequency band. When the device exhibits broadband absorption, it has a high 90% absorption of terahertz waves in the 3.66 THz to 9.98 THz frequency band. Furthermore, with increasing the VO2 conductivity, the peak transmittance of the device decreases from 93.8% to 0% and the absorption increases from 1% to 99.5%. The impedance matching theory is invoked and the physical mechanism of the device is elucidated by analyzing the surface electric field of the device. By studying the absorption characteristics for different incidence and polarization angles, the device is insensitive to polarization and has good absorption performance over large incidence angles. Compared with other absorbers of terahertz metamaterials, the device structure proposed in this study has a unique design and diverse functions, and can play an important role in various fields such as communications, electromagnetic stealth, sensors, and thermal emission devices.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"51 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495743","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":"Photocatalytic CO2 reduction catalysed by 3d transition metal complexes bearing an S2N2 ancillary ligand equipped with pyridine pendants as binding sites for Lewis acids","authors":"Tomoya Ishizuka, Asuka Hamaguchi, Yuki Hayashi, Yuto Tsukakoshi, Hiroaki Kotani, Takuya Kawanishi, Takahiko Kojima","doi":"10.1039/d4dt02922d","DOIUrl":"https://doi.org/10.1039/d4dt02922d","url":null,"abstract":"To solve the current environmental and energy problems, the development of an efficient photocatalytic system for CO<small>₂</small> reduction, producing useful chemical resources such as CO, is a promising approach. Herein, we have synthesized 3d-transition metal complexes (Mn, Fe, and Co) using an S<small>₂</small>N<small>₂</small>-type ligand (<strong>1</strong>), inspired by the structure of a natural CO<small>₂</small>-fixing enzyme, [NiFe]CODH, as CO<small>₂</small>-reducing catalysts. When a Zn<small>²⁺</small> salt was added as a Lewis acid to a solution of one of the complexes, containing [Ru(bpy)<small>₃</small>]<small>²⁺</small> as a photosensitizer and BIH (= 1,3-dimethyl-2-phenyl-2,3-dihydro-1<em>H</em>-benzo[<em>d</em>]imidazole) as a sacrificial reductant in dimethylacetamide/H<small>₂</small>O (9 : 1, v/v), the amount of CO evolved under photoirradiation at 450 nm was increased in comparison with that without the Zn<small>²⁺</small> salt. Notably, the selectivity of CO formation by <strong>1</strong>-Co was enhanced from 73% to 98% under photoirradiation at 450 nm, and the TON for CO formation by <strong>1</strong>-Mn increased to 875 after irradiation for 4 h.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"27 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495741","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":"The Family of tetranuclear Nb4OI12-x Clusters (x = 0, 1, 2): From the molecular Nb4OI12 cluster to extended chains and layers","authors":"Jan Beitlberger, Hans-Juergen Meyer, Mario Martin, Marcus Scheele, Markus Ströbele, Patrick Schmidt","doi":"10.1039/d5dt00174a","DOIUrl":"https://doi.org/10.1039/d5dt00174a","url":null,"abstract":"Unconventional reduction reactions in the Nb-O-I system have produced a number of niobium oxyiodides containing the oxygen-centered [Nb4O] cluster. Crystalline Nb4OI12 and two modifications of Nb4OI11 were structurally characterized by means of single-crystal X-ray diffraction studies. The new compounds can be classified as members of the Nb4OI12-x family, together with the already known Nb4OI10. Nb4OI12 is represented by a molecular stucture, in which the two modifications of Nb4OI11 are forming structures with iodido-bridged strings, that can be assigned to represent one-dimensional structures. Measurements of b-Nb4OI11 single crystals reveal semiconducting behaviour, with an electrical conductivity in the order of 10-3 S/m at 300 K and an electrical band gap estimated with 0.4 eV. The presence of varying numbers of cluster electrons in the given compounds is discussed in the light of second-order Jahn-Teller distortion.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"13 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495740","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":"Tailoring the local environment of Ln3+ in pyridine-based complexes: effect on the thermodynamic, kinetic, structural and relaxation properties","authors":"Martina Sanadar, Loeza Collobert, Harlei Martin, Jean-François Morfin, Zoltán Garda, Agnès Pallier, Serge Gambarelli, Andrea Melchior, Célia S. Bonnet","doi":"10.1039/d5dt00236b","DOIUrl":"https://doi.org/10.1039/d5dt00236b","url":null,"abstract":"The replacement of one or two negatively charged carboxylate functions by neutral pyridine or imidazole pendant groups in pyridine-based polyaminopolycarboxylate ligands was investigated. Four ligands were synthesized and the thermodynamic, kinetic, structural and relaxation properties of their corresponding Ln3+ complexes was thoroughly studied. The protonation constants of the ligands as well as the stability constants of the corresponding Ln3+ complexes were determined by pH potentiometric measurements. While no strong effect on the stability constant of the Ln3+ complexes is observed when one carboxylate is replaced by an imidazole or a pyridine, the replacement of two carboxylate functions is detrimental to the overall stability of the complexes. The dissociation kinetics of GdImPy and GdPyPy, evaluated through Eu3⁺-exchange reactions, predominantly proceed via an acid-catalyzed mechanism, with minimal direct Eu3⁺ attack. The presence of a protonatable function on the imidazole ring leads to more labile complexes. NMR and luminescence studies combined with DFT calculations evidenced the coordination of the imidazole or pyridine pendant arms. The Gd3+ complexes exhibit high relaxivity values (r1 = 8.25 mM−1.s−1 and 7.97 mM−1.s−1 at 60 MHz and 25 °C, for GdImPy and GdPyPy, respectively) in accordance with their bishydrated character, and no aggregation phenomena are observed over a wide range of concentrations. Variable-temperature ¹⁷O NMR and NMRD data analysis of GdImPy and GdPyPy provided insights into the microscopic parameters affecting their relaxation properties. Interestingly, the water exchange rate is strongly accelerated with the imidazole pendant arm compared to the pyridine, which could be related to steric crowding around the Ln3+ ion. The two inner-sphere water molecules are not displaced by interactions with biological cations such as citrate and phosphate. However, a relaxivity decrease of ca. 30% is observed in the presence of carbonate, as confirmed by ¹H relaxivity and luminescence lifetime measurements.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"10 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495742","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":"Influence of ancillary ligands on the formation and functionality of oxovanadium(V) metallosupramolecular assemblies: advanced computational and catalytic analysis","authors":"Edi Topic, Josipa Sarjanović, Danijela Musija, Mirna Mandarić, Andrea Cocut, Tomica Hrenar, Dominique Agustin, Jana Pisk, Višnja Vrdoljak","doi":"10.1039/d5dt00105f","DOIUrl":"https://doi.org/10.1039/d5dt00105f","url":null,"abstract":"Coordination-driven self-assembly approach offers opportunity for designing metallosupramolecular architectures with tailored properties. Applying this strategy, we present the synthesis and detailed characterization of tetranuclear and polynuclear vanadium(V) compounds with an aroylhydrazone ligand. These assemblies were obtained using the 3-methoxy-2-hydroxybenzaldehyde isonicotinoyl hydrazone ligand (H<small>₂</small>VIH) and NH<small>₄</small>VO<small>₃</small> in the presence of primary alcohols of increasing carbon chain length (from one to five carbon atoms). Reactions in lower alcohols selectively yielded metallocyclic compounds [VO(VIH)(OR)]<small>₄</small> (<strong>1</strong>, <strong>2</strong>, and <strong>3</strong>, where R = CH<small>₃</small>, C<small>₂</small>H<small>₅</small>, and C<small>₃</small>H<small>₇</small>, respectively), while reactions in higher alcohols afforded infinite zig-zag chain polymers [VO(VIH)(OR)]<em><small>_n</small></em> (<strong>4</strong> and <strong>5</strong>, where R = C<small>₄</small>H<small>₉</small> and C<small>₅</small>H<small>₁₁</small>, respectively). Their formation was studied experimentally and computationally. Quantum chemical calculations using density functional theory provided valuable insights into the stability of both cyclic and chain assemblies. The solid-state structures of <strong>1</strong>–<strong>5</strong> and pseudopolymorphs of [VO<small>₂</small>(HVIH)] (<strong>6·0.5H<small>₂</small>O·0.5CH<small>₃</small>OH</strong> and <strong>6·2H<small>₂</small>O</strong>) were confirmed using single-crystal and powder X-ray diffraction methods. The oxovanadium(V) species were tested as catalysts for cyclooctene and benzyl alcohol oxidation, with results correlated to those for analogous molybdenum complexes [MoO<small>₂</small>(VIH)]<small>₄</small> (<strong>7</strong>) and [MoO<small>₂</small>(VIH)(C<small>₂</small>H<small>₅</small>OH)] (<strong>8</strong>). The influence of the metal centre, nuclearity, and ancillary ligand identity on catalytic performance was also investigated, revealing that the vanadium metal center influences the catalytic activity due to its capacity to form robust structures.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"25 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495748","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":"Nitrogen and phosphorus co-doped porous carbons for high energy density and low shuttling Na/S batteries","authors":"Navid Aslfattahi, Maryam Sadat Kiai, Nilgun Baydogan, Lingenthiran Samylingam, Kumaran Kadirgama, Chee Kuang Kok","doi":"10.1039/d5dt00148j","DOIUrl":"https://doi.org/10.1039/d5dt00148j","url":null,"abstract":"Porous carbons with their abundant availability and high electrical conductivity present significant potential as cathode materials for Na–S batteries. In this study, we report the synthesis of nitrogen and phosphorus co-doped porous carbon (P–N co-doped PC) through a one-step carbonization process utilizing ammonium polyphosphate as the source of nitrogen and phosphorus. The average reversible capacities for P–N co-doped PC were 920, 861, 823 and 756 mA h g<small>⁻¹</small> at current densities of 0.2, 0.5, 1.0 and 2.0 C, respectively. Notably, upon returning to current densities of 1.0, 0.5 and 0.2 C, the capacities were restored to 805, 853 and 906 mA h g<small>⁻¹</small>, highlighting the exceptional stability of the P–N co-doped PC. The pronounced capacitive storage mechanism of P–N co-doped PC can be attributed to the presence of numerous surface defects and active sites resulting from the co-doping of nitrogen and phosphorus. In particular, the remarkable cycling stability exhibited by the P–N co-doped PC can be ascribed to the exceptional stability of the surface layer that has undergone phosphorus doping, thereby facilitating the migration of ions. This research contributes valuable insights into the development of advanced Na–S batteries through the utilization of heteroatom-doped functionalized porous carbons.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"15 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495739","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}