Macromolecular Rapid Communications最新文献_第9页

Zinc Phthalocyanine Core-First Star Polymers Through Nitroxide Mediated Polymerization and Nitroxide Exchange Reaction. 通过氧化亚氮介导的聚合反应和氧化亚氮交换反应制备锌酞菁芯先星聚合物。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-09-28 DOI: 10.1002/marc.202400601

Erem Ahmetali, Azra Kocaarslan, Stefan Bräse, Patrick Théato, M Kasım Şener

{"title":"Zinc Phthalocyanine Core-First Star Polymers Through Nitroxide Mediated Polymerization and Nitroxide Exchange Reaction.","authors":"Erem Ahmetali, Azra Kocaarslan, Stefan Bräse, Patrick Théato, M Kasım Şener","doi":"10.1002/marc.202400601","DOIUrl":"10.1002/marc.202400601","url":null,"abstract":"Nitroxide-mediated polymerization (NMP) and nitroxide exchange reaction (NER) are very efficient methodologies that require only suitable alkoxyamine derivatives and create different polymeric architectures in a controlled manner. Herein, the synthesis of star polymers containing TEMPO-substituted symmetric zinc phthalocyanine (ZnPc) is presented via NMP and NER. Moreover, linear polymer formation is conducted in a single arm on TEMPO-substituted asymmetric ZnPc to elucidate the properties of star polymers. All linear and star polymers are characterized by FT-IR, UV-vis, fluorescence, GPC, NMR, and EPR techniques. The results show that the proposed reactions are capable of forming controlled star-shaped polymers. The increasing arm number (from a single to four arms) results in variable dispersity values (Đ) (1.2-3) due to different arm lengths, especially in NMP. However, this difficulty has been overcome via NER, and star polymers have been successfully synthesized with relatively low molecular weight (30 K > 10 K) and low dispersity (1.2-1.9). The results clearly indicate that while styrene and 4-vinyl benzyl chloride monomers are introduced to the structure equally, star polymers with phthalocyanine can be synthesized in a controlled manner, and their quarternized derivatives have the potential to be effective as photoactive agents in photodynamic therapy.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400601"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11713867/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142338001","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}

引用次数: 0

Uniform Polymer Microspheres by Photoinduced Metal-Free Atom Transfer Radical Precipitation Polymerization. 通过光诱导无金属原子转移自由基沉淀聚合技术制备均匀聚合物微球。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-11-05 DOI: 10.1002/marc.202400502

Tugrul Cem Bicak, Huiyin Liu, Karsten Haupt, Carlo Gonzato, Jérôme Fresnais, Christine Ménager, Louis Fensterbank, Cyril Ollivier, Nébéwia Griffete

引用次数: 0

Exploration of the Photoluminescence Behavior and Emission Mechanism of Thioester Polyacrylamide Tablets During the Gradual Increase of Molecular Weight. 硫酯聚丙烯酰胺片在分子量逐渐增加过程中的光致发光行为和发射机制探索

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-10-18 DOI: 10.1002/marc.202400657

Qing Zhou, Jun Wang, Yuanchao Zhang, Lei Yang

{"title":"Exploration of the Photoluminescence Behavior and Emission Mechanism of Thioester Polyacrylamide Tablets During the Gradual Increase of Molecular Weight.","authors":"Qing Zhou, Jun Wang, Yuanchao Zhang, Lei Yang","doi":"10.1002/marc.202400657","DOIUrl":"10.1002/marc.202400657","url":null,"abstract":"To enhance the photoluminescence (PL) of unconventional luminescent compounds, particularly their persistent room temperature phosphorescence (p-RTP) performance, compressing the powder into tablets has been demonstrated as a viable approach. Nevertheless, the alterations in the emission capability of PL in compacted tablets have not been comprehensively investigated. In this study, four polyacrylamide (PAM) with controllable molecular weight (MW) are fabricated from powder to tablets, and their PL emission properties are thoroughly examined and compared with corresponding powders to elucidate the emission mechanism. As MW increases, both PL and p-RTP emissions of the tablets gradually intensify, exhibiting significant enhancement compared to the corresponding powder while retaining the characteristic blue shift. Through small angle X-ray scattering (SAXS), construction of molecular models for tablets, detailed analysis of molecular interactions, and theoretical calculations are conducted to reasonably explain these emission phenomena using clustering-triggered emission (CTE) and average packing density promoted emission (PDE) mechanisms. These findings not only advance the understanding of nonconventional luminogens' emission mechanisms but also offer new insights for preparing nonconventional luminescent polymers with controllable p-RTP emission performance.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400657"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of Zinc(II) Mediated Poly(Acrylamide Co Acrylic Acid) Hydrogel with Thixotropic and Tribological Properties. 制备具有触变性和摩擦学特性的锌(II)介导聚丙烯酰胺-丙烯酸水凝胶。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-10-26 DOI: 10.1002/marc.202400670

Paresh Nageshwar, Suraj W Wajge, Gopal Lal Dhakar, Avinash A Thakre, Swapnil Tripathi, Shiva Singh, Pradip K Maji, Chayan Das

{"title":"Fabrication of Zinc(II) Mediated Poly(Acrylamide Co Acrylic Acid) Hydrogel with Thixotropic and Tribological Properties.","authors":"Paresh Nageshwar, Suraj W Wajge, Gopal Lal Dhakar, Avinash A Thakre, Swapnil Tripathi, Shiva Singh, Pradip K Maji, Chayan Das","doi":"10.1002/marc.202400670","DOIUrl":"10.1002/marc.202400670","url":null,"abstract":"Hydrogels have emerged as promising candidates for biomedical applications, such as replacing natural articular cartilage, owing to their unique viscoelastic properties. However, sufficient mechanical properties, self-healing ability, and adhesive nature are some issues limiting its application window. Here, a facile one-pot synthesis of dual cross-linked zinc-coordinated copolymer hydrogels is presented. The network structure of the copolymer hydrogels is strategically developed via dynamic and reversible physical cross-linking by Zn2+ ions and simultaneous covalent cross-linking through a covalent cross-linker viz methylene bisacrylamide. Fourier-transform infrared (FTIR), X-ray diffraction (XRD) scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) analysis have thoroughly characterized the structure of the synthesized hydrogels. The introduction of Zn2+ offers dynamic and reversible complexation, leading to excellent mechanical properties and self-healing features. Moreover, the percentage of the equilibrium water content of zinc-coordinated copolymer hydrogel samples is comparable with that of natural articular cartilage. The Shear sliding study shows the dominant adhesive behavior of HGel-Zn(NO3)2 sample compared to the parent HGel sample. This facile dual cross-linked hydrogel, HGel-Zn(NO3)2, with a combination of good mechanical properties, efficient self-recovery, adequate water content, and favorable adhesive nature, seems very promising to mimic the articular cartilage.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400670"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Self-Assembly of Poly(4-acetoxystyrene) Cubosomes. 聚（4-乙酰氧基苯乙烯）立方体的合成与自组装。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-10-16 DOI: 10.1002/marc.202400633

Marcel Schumacher, Marvin Foith, Manuel Trömer, Nadine Tänzer, Sabine Rosenfeldt, Markus Retsch, André H Gröschel

引用次数: 0

The Trade-Off between Dechlorination and Polymerization for Facile Fabrication of Electronic Grade Epoxidized Cardol. 在脱氯和聚合之间权衡利弊，轻松制造电子级环氧卡尔德酚。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2025-01-01 Epub Date: 2024-11-23 DOI: 10.1002/marc.202400489

Fengyan Zhang, Zihao Tian, Liangyong Chu, Wenxiao Lv, Liming Shen, Xiaoyan Zhang, Xiaobao Li, Ningzhong Bao

{"title":"The Trade-Off between Dechlorination and Polymerization for Facile Fabrication of Electronic Grade Epoxidized Cardol.","authors":"Fengyan Zhang, Zihao Tian, Liangyong Chu, Wenxiao Lv, Liming Shen, Xiaoyan Zhang, Xiaobao Li, Ningzhong Bao","doi":"10.1002/marc.202400489","DOIUrl":"10.1002/marc.202400489","url":null,"abstract":"The dechlorination of epoxidized Cardol (E-Cardol), which is a high-performance and sustainable adhesive and packaging material for electronics, remains challenging. The previous work proposed a new alcohol-sodium refining method to efficiently remove the chlorine of E-Cardol. However, this method is strongly limited by the trade-off between the dechlorination efficiency and its polymerization side effect, which leads to the viscosity as well as the epoxy equivalent increase of E-Cardol. Based on the detailed analysis of the refining process using fourier transform infrared spectroscopy (FTIR), simultaneous thermal analysis (STA), and nuclear magnetic resonance spectrometer (NMR) epoxidized Cardol (E-Cardol), this trade-off is studied. It is found that the dechlorination efficiency increases with the increase of the usage of the alcohol sodium. Meanwhile, when the residual alcohol-sodium content after refining exceeds 3000 ppm, the viscosity of the E-Cardol increases significantly due to the increased polymerization of E-Cardol by epoxy ring-opening reaction. It is demonstrated that the alcohol-sodium refining method can efficiently reduce the chlorine content of E-Cardol with the initial hydrolyzable chlorine content not higher than 3000 ppm to below 300 ppm without influencing their epoxy equivalent and viscosity. This paper thoroughly explores the mechanism and application range of the proposed alcohol-sodium refining method, which is crucial for the facile preparation of electronic-grade E-Cardol materials.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400489"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142694931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical Deformation Behavior of Polymer Blend Thin Films. 聚合物共混薄膜的力学变形行为。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-12-31 DOI: 10.1002/marc.202400736

Geeta Pokhrel, Hyungyung Jo, Nicholas M Christ, Hyeyoung Son, John A Howarter, Chelsea S Davis

{"title":"Mechanical Deformation Behavior of Polymer Blend Thin Films.","authors":"Geeta Pokhrel, Hyungyung Jo, Nicholas M Christ, Hyeyoung Son, John A Howarter, Chelsea S Davis","doi":"10.1002/marc.202400736","DOIUrl":"https://doi.org/10.1002/marc.202400736","url":null,"abstract":"Examining the mechanical properties of polymer thin films is crucial for high-performance applications such as displays, coatings, sensors, and thermal management. It is important to design thin film microstructures that excel in high-demand situations without compromising mechanical integrity. Here, a polymer blend of polystyrene (PS) and polyisoprene (PI) is used as a model to explore microscale deformation behavior under uniaxial mechanical testing. Six thin film compositions ranging from pure PS to a 4.5:5.5 ratio of PS to PI are fabricated. The thin films are deformed under compression, tension, and cyclic loadings, while monitoring the behavior utilizing a micromechanical stage and optical microscopy. To calculate the plane strain modulus, a strain-induced elastic buckling instability technique is employed. The results show that as the PI concentration increases, the plane strain modulus of the films decreases while the fracture strain increases. For the 4.5:5.5 ratio of PS to PI with a continuous rubbery PI phase, the thin films show major recoverable mechanical performance. This behavior is attributed to the mechanical strength of glassy PS combined with the strain energy absorption capability of rubbery PI, enabling elastic recovery. These fundamental observations provide valuable insights for designing mechanically resilient thin films for coatings and flexible devices.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400736"},"PeriodicalIF":4.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142908746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Building a Co-Salen-Immobilized Porous Organic Polymer Catalyst for CO₂ Cycloaddition. co - salen固定化多孔有机聚合物CO2环加成催化剂的构建。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-12-27 DOI: 10.1002/marc.202400836

Shuai Gu, Lei Li, Lingling Hu, Shuyu Guo, Yi Feng, Huicong Zhang, Guipeng Yu, Juntao Tang

引用次数: 0

1D Covalent Organic Frameworks with Tunable Dual-Cobalt Synergistic Sites for Efficient CO₂ Photoreduction. 具有可调双钴协同位点的1D共价有机框架用于有效的CO2光还原。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-12-27 DOI: 10.1002/marc.202400780

Shu-Kun Xia, Yong Liu, Ruo-Meng Zhu, Jing-Dong Feng, Wang-Kang Han, Zhi-Guo Gu

{"title":"1D Covalent Organic Frameworks with Tunable Dual-Cobalt Synergistic Sites for Efficient CO2 Photoreduction.","authors":"Shu-Kun Xia, Yong Liu, Ruo-Meng Zhu, Jing-Dong Feng, Wang-Kang Han, Zhi-Guo Gu","doi":"10.1002/marc.202400780","DOIUrl":"https://doi.org/10.1002/marc.202400780","url":null,"abstract":"Diatomic catalysts enhance photocatalytic CO2 reduction through synergistic effects. However, precisely regulating the distance between two catalytic centers to achieve synergistic catalysis poses significant challenges. In this study, a series of one-dimensional (1D) covalent organic frameworks (COFs) are designed with adjustable micropores to facilitate efficient CO2 photoreduction. CO2 molecules are anchored between dual-cobalt centers within micropores, thus effectively reducing their activation energy and initiating the photocatalytic process. Additionally, the formation of *COOH intermediates is significantly influenced by the coordination microenvironment around dual-cobalt sites. Notably, COF-Co-N4 exhibited remarkable CO2 photoreduction activity with a CO evolution rate of 110.3 µmol·g-1·h-1, which surpasses most of previously reported single-atom-site photocatalysts. Comprehensive characterization and density functional theory (DFT) calculations revealed that 1D COFs with dual-cobalt sites possess the ability to anchor CO2 molecules, thereby enhancing the efficacy of synergistic catalysis. Simultaneously, COF-Co-N4 with quadruple nitrogen coordination significantly reduced the energy barrier of crucial *COOH intermediate, facilitating efficient photocatalytic CO2 reduction. This study meticulously modulated the coordination microenvironment surrounding dual-cobalt synergistic sites, providing new insight into the design of high-performance photocatalysts.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400780"},"PeriodicalIF":4.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142891104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Intramolecular Self-Assembly of Statistical Copolymers in Aqueous Solution to Form Anisotropic Single-Chain Nanoparticles with Tunable Aspect Ratio. 统计共聚物在水溶液中的分子内自组装形成具有可调长宽比的各向异性单链纳米颗粒。

IF 4.2 3区化学

Macromolecular Rapid Communications Pub Date : 2024-12-27 DOI: 10.1002/marc.202400898

Thomas J Neal, Rebecca E Stone, Csilla György, Svetomir B Tzokov, Sebastian G Spain, Oleksandr O Mykhaylyk

{"title":"The Intramolecular Self-Assembly of Statistical Copolymers in Aqueous Solution to Form Anisotropic Single-Chain Nanoparticles with Tunable Aspect Ratio.","authors":"Thomas J Neal, Rebecca E Stone, Csilla György, Svetomir B Tzokov, Sebastian G Spain, Oleksandr O Mykhaylyk","doi":"10.1002/marc.202400898","DOIUrl":"https://doi.org/10.1002/marc.202400898","url":null,"abstract":"Natural single-chain nanoparticles (SCNPs) such as proteins have inspired research into the formation and application of synthetic SCNPs. Although the latter can mimic general aspects of the self-assembly behavior of their biological counterparts, these systems remain relatively understudied. In this respect, a systematic series of amphiphilic statistical copolymers (ASC) of different molecular weights, with a hydrophilic comonomer (methacrylic acid) and varying hydrophobic comonomer to encompass methacrylates of different hydrophobicity, are synthesized. Small-angle X-ray scattering studies confirmed that SCNPs are achieved for each copolymer series when dispersed in basified water at 1% w/w. When the aggregation number of the ASC nanoparticles is close to unity the particle shape elongates resulting in a larger particle surface area to volume ratio, allowing more hydrophilic groups to locate on the particle surface tending to keep the particle surface charge density (PSC) constant. Thus, within a series, particle elongation increases with copolymer molecular weight. Structural parameters of SCNPs formed by ASCs composed of hydrophobic components with low partition coefficients are well consistent with predictions obtained from the PSC model. These results highlight the main parameters, namely molecular weight and acid content, responsible for the SCNP formation and provide insight into how specific particle morphology can be targeted.","PeriodicalId":205,"journal":{"name":"Macromolecular Rapid Communications","volume":" ","pages":"e2400898"},"PeriodicalIF":4.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0