CrystEngComm最新文献

{"title":"Blue- and white-light emitting 2D metal–organic frameworks of cis-5-norbornene-endo-2,3-dicarboxylic acid†","authors":"Ahmed Mohammed A. Alghamdi, Shakeeba Cholikadam, Mohammed Fettouhi, Abdul Nasar Kalanthoden, Almaz S. Jalilov and Abdul Malik P. Peedikakkal","doi":"10.1039/D4CE00985A","DOIUrl":"https://doi.org/10.1039/D4CE00985A","url":null,"abstract":"<p >Two-dimensional (2D) materials have recently gained increased attention owing to their potential applications in catalysis and as luminescent materials in optoelectronics. Herein, we report the synthesis of two distinct blue- and white-light emitting crystalline 2D-metal organic frameworks (MOFs) using <em>cis</em>-5-norbornene-<em>endo</em>-2,3-dicarboxylic acid (NDA) as a ligand with Pb(NO<small>₃</small>)<small>₂</small> [Pb(NDA)] (<strong>1</strong>) and Zn(OAc)<small>₂</small>·2H<small>₂</small>O [Zn(NDA)] (<strong>2</strong>), respectively. Compound <strong>1</strong> forms <em>hepta</em>-coordinated Pb(<small>II</small>) geometry with greater distortion, resulting in a 2D MOF with a (4,4) network topology. In contrast, in <strong>2</strong>, Zn(<small>II</small>) centers are linked through NDA ligands to furnish a 2D MOF. The final structural characteristics of the synthesized compounds were significantly impacted by the carboxylic acid ligand. Upon excitation at 365 nm, compound <strong>2</strong> displayed blue-light emission, while compound <strong>1</strong> demonstrated near-white-light emission of solid-state photoluminescence (PL). The differing emissions of the two 2D sheets were associated with the bridging NDA ligand and the relative structural differences between the 2D structures. The shortest non-bonded metal-to-metal distance is lower in <strong>1</strong> than that in <strong>2</strong>. Compound <strong>1</strong> exhibits a higher packing efficiency of bridging-metal centered clusters of layers; such packing is less pronounced in compound <strong>2</strong> because of the differences in coordination geometries. These differences profoundly affect the luminescent characteristics of <strong>1</strong> and <strong>2</strong>.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 913-920"},"PeriodicalIF":2.6,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379621","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":"Luminescent lanthanide-doped calcium phosphate from oyster shell waste: an example of bright recycling†","authors":"Paula Puentedura-Navarro, Raquel Fernández-Penas, Francisco Javier Acebedo-Martínez, Carla Triunfo, Jorge F. Fernández-Sánchez, Antonia Follenzi, Francesca Oltolina, Giuseppe Falini and Jaime Gómez-Morales","doi":"10.1039/D4CE01217H","DOIUrl":"https://doi.org/10.1039/D4CE01217H","url":null,"abstract":"<p >This research explores the transformation of biogenic CaCO<small>₃</small> microparticles (<em>Ø</em> &lt; 45 μm) from oyster shell waste into luminescent Eu- or Tb-doped calcium phosphate (apatites), using a sustainable “one-step” and eco-friendly method. The full transformation was achieved at 200 °C <em>via</em> a dissolution–precipitation mechanism. Precipitates were composed of Eu- or Tb-doped apatite particles, with average sizes <em>L</em> = 163 ± 7 nm and anisometric shapes for the former, and 41 ± 8 nm and more isometric shapes for the latter. Alongside these, particles of either EuPO<small>₄</small>·<em>n</em>H<small>₂</small>O or TbPO<small>₄</small>·<em>n</em>H<small>₂</small>O (rhabdophane) were present. The physicochemical and electrokinetic analysis revealed the A- and B-carbonate substitutions and labile CO<small>₃</small><small>²⁻</small> species in the apatite particles, and <em>ζ</em>-potentials approaching zero in the aqueous suspensions at physiological pH levels, indicating a tendency for particle aggregation. The luminescence properties, such as relative luminescent intensity and luminescence lifetimes, were dependent on the lanthanide content and the presence of the rhabdophane phase. The Ap–Ln samples demonstrated cytocompatibility, with cell viability exceeding 85% when incubated with murine pancreatic endothelial cells (MS1) and murine mesenchymal stem cells (m17.ASC), regardless of the lanthanide type or the particle dosage used (ranging from 0.1 to 100 μg mL<small>⁻¹</small>).</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 8","pages":" 1078-1089"},"PeriodicalIF":2.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ce/d4ce01217h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of ammonia on the microstructure and crystallinity of nickel-based carbonate materials†","authors":"Jing Lao, Jiashen Zhang and Yangcheng Lu","doi":"10.1039/D4CE01156B","DOIUrl":"https://doi.org/10.1039/D4CE01156B","url":null,"abstract":"<p >In this work, we focus on interpreting the effects of ammonia on the crystallization route of Ni-based metal carbonates, Ni<small>_<em>x</em></small>Co<small>_<em>y</em></small>Mn<small>_<em>z</em></small>CO<small>₃</small> (0 &lt; <em>x</em>, <em>y</em>, <em>z</em> &lt; 1, <em>x</em> : <em>y</em> : <em>z</em> = 8 :1 : 1, MCO<small>₃</small>). The nucleation and crystal growth processes of MCO<small>₃</small> are effectively decoupled by carrying out explosive nucleation in a microreactor, followed by hydrothermal crystallization in sequence. During the hydrothermal crystallization process, the presence and content of ammonia significantly affect the crystal structure, composition and morphology of MCO<small>₃</small> particles, which play a key role in the transformation process of crystals. Meanwhile, ammonia can regulate the precipitation–complexation balance through the interaction of hydrogen bonds and the formation of metal complexes and improve the formation of a nanocubic microstructure. The recognition of the growth mechanism may further help in the modification research on carbonate materials.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 964-973"},"PeriodicalIF":2.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379627","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":"Construction of lacunary α-K8SiW11O39 polyoxometalate/MIL-101(Cr) MOF/CoFe2O4 magnetic nanocomposites for adsorptive removal of toxic azo dyes and antibiotics from wastewater†","authors":"Hamidreza Nourolahi, Saeed Farhadi, Reihaneh Malakooti, Mansoureh Maleki and Farzaneh Mahmoudi","doi":"10.1039/D5CE00013K","DOIUrl":"https://doi.org/10.1039/D5CE00013K","url":null,"abstract":"<p >In this work, a ternary magnetic nanocomposite based on the MIL-101(Cr) metal–organic framework hybridized with lacunary Keggin-type polyoxometalate (α-K<small>₈</small>SiW<small>₁₁</small>O<small>₃₉</small>·13H<small>₂</small>O; LPOM) and cobalt ferrite nanoparticles (CoFe<small>₂</small>O<small>₄</small>; CFO) as a magnetic component was synthesized through a hydrothermal route. The ternary magnetic nanocomposite with the feature LPOM@MIL-101(Cr)/CFO was characterized <em>via</em> FT-IR, XRD, Raman, FE-SEM, EDX, TEM, VSM, zeta potential, BET, TGA, and UV-vis spectroscopy. The results confirmed that heteropolyanions were successfully encapsulated in MIL-101(Cr) cavities. The surface area and pore volume in the ternary magnetic nanocomposite have been significantly decreased compared to the metal–organic framework due to the integration of polyoxometalate and cobalt ferrite nanoparticles. The ability of the ternary magnetic nanocomposite to remove organic dyes methylene blue (MB), rhodamine B (RhB), and methyl orange (MO) and antibiotic drug ciprofloxacin (CIP) from aqueous solutions was investigated. The ternary magnetic nanocomposite revealed effective CIP drug adsorption. Additionally, it demonstrated rapid and selective adsorption for cationic dyes from the mixed dye solutions of MB/MO, MB/RhB, RhB/MO, and MB/RhB/MO. In comparison with its single and double components, the ternary magnetic LPOM@MIL-101(Cr)/CFO nanocomposite demonstrated superior adsorption performance. The adsorption process followed both the pseudo-second-order model and the Langmuir model, indicating that the reaction was spontaneous and achieved a maximum adsorption capacity of 103 and 64 mg g<small>⁻¹</small> for MB and CIP pollutants. Electrostatic attraction was found to be the primary driving force behind the adsorption process, and the material retained 95% of its maximum adsorption capacity even after four cycles. The magnetic nanocomposite LPOM@MIL-101(Cr)/CFO is easily separated using a magnet and recycled without any change in the structure.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 8","pages":" 1185-1205"},"PeriodicalIF":2.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430712","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":"Histidine-directed synthesis and optical properties of two indium phosphite–oxalates with three-dimensional structures†","authors":"Xuemei Wen, Ying Li, Yan Zhao, Jing Li, Hongmei Zeng, Guohong Zou and Zhien Lin","doi":"10.1039/D4CE01135J","DOIUrl":"https://doi.org/10.1039/D4CE01135J","url":null,"abstract":"<p >Two indium phosphite–oxalates with three-dimensional structures have been synthesized under the structure-directing effect of histidine. In compound <strong>1</strong>, histidine molecules act as terminal ligands, whereas in compound <strong>2</strong>, they function not only as terminal ligands but also as extra framework cations. The dual role of histidine induces compound <strong>2</strong> to form a noncentrosymmetric structure with an interesting second-harmonic generation response. Both compounds <strong>1</strong> and <strong>2</strong> exhibit blue luminescence under ultraviolet light irradiation, originating from the histidine molecules.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 903-907"},"PeriodicalIF":2.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379619","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":"Structural analysis and water adsorption properties of chloranilate anion–terpyridine metal complexes forming hydrogen-bonded frameworks†","authors":"Akio Mishima, Runa Mori, Ken Kanazashi, Tomohiko Hamaguchi, Ryuta Ishikawa and Satoshi Kawata","doi":"10.1039/D4CE01214C","DOIUrl":"https://doi.org/10.1039/D4CE01214C","url":null,"abstract":"<p >Emerging microporous hydrogen-bonded organic frameworks (HOFs) are expected to overcome water shortages owing to their potential in harvesting and releasing water at low energies. To investigate their water adsorption properties, two distinct types of HOFs are synthesized. The frameworks are composed of chloranilic acid (H<small>₂</small>CA), terpy complexes, and crystal water. The complexes are denoted as [M(terpy)<small>₂</small>](H<small>₂</small>CA)<small>_0.5</small>(HCA)(CA)<small>_0.5</small>·H<small>₂</small>O (<strong>M–A</strong>) and [M(terpy)<small>₂</small>](CA)·6H<small>₂</small>O (<strong>M–B</strong>), where M represents Fe<small>²⁺</small>, Co<small>²⁺</small>, or Ni<small>²⁺</small>. Structural characterization results reveal that <strong>M–A</strong> contains H<small>₂</small>CA, chloranilate monoanion (HCA<small>⁻</small>), and chloranilate dianion (CA<small>²⁻</small>). <strong>M–A</strong> complexes comprise one-dimensional chains of H<small>₂</small>CA–CA<small>²⁻</small> and HCA<small>⁻</small>–water, forming a three-dimensional framework <em>via</em> hydrogen bonding with [M(terpy)<small>₂</small>]<small>²⁺</small>. <strong>M–B</strong> complexes contain [M(terpy)<small>₂</small>]<small>²⁺</small>, CA<small>²⁻</small>, and six water molecules. The CA<small>²⁻</small> and water molecules form a two-dimensional layered arrangement <em>via</em> hydrogen bonding, and the water molecules form tetramers within the layers. N<small>₂</small> adsorption measurements indicate that both the <strong>M–A</strong> and <strong>M–B</strong> complexes are non-porous. In water adsorption–desorption experiments, <strong>M–A</strong> adsorbs one water molecule per unit with minimal structural changes, whereas <strong>M–B</strong> adsorbs six water molecules per unit and undergoes a multi-step isothermal adsorption process, indicating significant structural changes. Furthermore, the adsorption properties were observed to vary with the central metal ion. The differing adsorption behaviors of <strong>M–B</strong> may be attributed to the hydrogen bonding distances within the crystalline water tetramers forming the hydrogen bonded network. The HOFs explored in this study may be utilized for selectively adsorbing water molecules in low-humidity environments, such as arid regions.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 931-938"},"PeriodicalIF":2.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ce/d4ce01214c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing non-covalent interactions in modified thiophenes: structural design and applications in materials and biological sciences","authors":"Arvin Sain Tanwar and Franck Meyer","doi":"10.1039/D4CE01213E","DOIUrl":"https://doi.org/10.1039/D4CE01213E","url":null,"abstract":"<p >Thiophene, a ubiquitous and versatile heterocyclic compound, serves as a cornerstone for modern material sciences due to its distinctive electronic properties and ability to engage in non-covalent interactions, such as π⋯π stacking and chalcogen bonding. These interactions can be further enhanced by introducing hydrogen and halogen bond donor groups, rendering functionalized thiophenes highly adaptable and invaluable across a broad spectrum of scientific disciplines. This highlight examines the pivotal role of thiophene-based compounds in advancing organic electronic materials (semiconductors, nonlinear optics, solar cells), sensors, medicinal chemistry (drug design), solid-state reactions (polymerization, mechanochemistry), crystal engineering and the formation of supramolecular helices. The properties and applications of these compounds are predominantly explored through crystallographic data, complemented by microscopy and density functional theory (DFT) studies. From designing advanced functional materials to pioneering new approaches in health and technology, thiophene derivatives exemplify the power of non-covalent interactions in driving innovation.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 6","pages":" 736-748"},"PeriodicalIF":2.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107286","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":"Microscopic kinetic model of gas hydrate and the effect of brine: a case study of natural gas hydrate from the seabed off the Tokachi coast","authors":"Satoshi Takeya, Kiyofumi Suzuki, Akihiro Hachikubo, Hirotoshi Sakagami, Hirotsugu Minami, Satoshi Yamashita, Keiichi Hirano, Kazuyuki Hyodo, Masahide Kawamoto and Akio Yoneyama","doi":"10.1039/D4CE00999A","DOIUrl":"https://doi.org/10.1039/D4CE00999A","url":null,"abstract":"<p >Crystallization and dissociation are among the most prominent phenomena in condensed matter science; however, their microscopic understanding, such as with impurities, remains fragmentary. In this study, an experimental approach was used to investigate the microscopic mechanisms of crystallization and dissociation using structure I (sI) natural gas hydrates sampled from the seabed off the coast of Tokachi, Japan. Detailed information on the structural signature was obtained using multiscale imaging methods, including two synchrotron X-ray computed tomography (CT) methods, for samples with a hydrate mass fraction of 65 wt% and a salinity of 0.1 wt% in an icy sample. It was revealed that the crystallization step was driven by CH<small>₄</small> gas bubbles rising in the subsurface and that the pseudo-spherical structure, which was subsequently converted to gas hydrate, was retained. After cryopreservation of the sample, the dissociation front at the time of recovery was preserved by self-preservation; however, hydrate dissociation proceeded from the inner grain boundary, even at subzero temperatures. These results clearly indicate that the formation and dissociation processes of gas hydrates are affected by the salinity of seawater. Quantitative observations of natural gas hydrate crystals over time contribute to our understanding of the crystallization and decomposition mechanisms under more complex conditions.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 5","pages":" 695-702"},"PeriodicalIF":2.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107370","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":"A comparative study of edge-selective and face-specific growth of PdAg alloys on au nanoplates and their applications for the ethanol oxidation reaction†","authors":"Yanpei An, Yingying Wang, Yuanyuan Min, Xiaoyi Guo, Yanyun Ma, Xian-Sen Tao, Xianhong Li and Yiqun Zheng","doi":"10.1039/D4CE01165A","DOIUrl":"https://doi.org/10.1039/D4CE01165A","url":null,"abstract":"<p >We present the synthesis of two-dimensional Au–PdAg hybrid electrocatalysts with two distinct morphologies through site-specific deposition in seeded growth. The co-reduction of Pd and Ag precursors in the presence of plate-like Au seeds, using CTAC and CTAB as capping agents, led to edge- and face-specific deposition. This approach successfully and selectively engineered the interface between Au and PdAg phases along the edge region and upper/bottom faces, respectively. Our results demonstrate that the Au–PdAg products exhibit superior electrocatalytic activity and long-term durability for ethanol oxidation in alkaline media compared to commercial Pt/C electrocatalysts. DFT simulations further validated the advantages of constructing Au–PdAg interfaces over alloyed counterparts in EOR electrocatalysis. The current study offers a viable strategy for constructing two-dimensional trimetallic EOR electrocatalysts with well-defined interfaces, potentially paving the way for the rational design of high-performance fuel cell catalysts.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 1016-1025"},"PeriodicalIF":2.6,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379672","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":"Thiadiazole-functionalized Pb(ii)-MOF for “turn-on” fluorescence selective sensing of Al3+†","authors":"Hangchuan Zhang, Jingpeng Guo, Lin Liu, Zhan Yu and Na Wei","doi":"10.1039/D4CE01233J","DOIUrl":"https://doi.org/10.1039/D4CE01233J","url":null,"abstract":"<p >Multifunctional metal–organic frameworks (MOFs) for fluorescence sensing have received considerable attention. In this work, a novel thiadiazole-functionalized Pb(<small>II</small>) based MOF, [Pb(BTDB)(DMF)]<small>_<em>n</em></small> (H<small>₂</small>BTDB = 4,4′-(benzo[<em>c</em>][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid, DMF = <em>N</em>,<em>N</em>-dimethylformamide), has been constructed <em>via</em> a solvothermal method, which presents a two-dimensional layer structure. This Pb(<small>II</small>)-MOF exhibits chemical stability in some organic solvents for a long time, and the thiadiazole groups on the ligands endow this Pb(<small>II</small>)-MOF with outstanding fluorescence properties. Moreover, Pb(<small>II</small>)-MOF can selectively detect Al<small>³⁺</small> through fluorescence enhancement and blue shift, with a detection limit of 11 μM, and this material as a fluorescent sensor to identify Al<small>³⁺</small> demonstrates excellent anti-interference ability, sensitivity and recyclability. The mechanism of sensing is further explored using XPS and FTIR spectroscopy and the results reveal that the “turn-on” and blue-shift fluorescence phenomena are attributed to the intermolecular interaction between nitrogen atoms in the thiadiazole groups and Al<small>³⁺</small>.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 7","pages":" 956-963"},"PeriodicalIF":2.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379626","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}