ACS Macro Letters最新文献_第9页

IF 5.1

ACS Macro Letters Pub Date : 2025-07-15

Lillian E. Mortensen, Fernando Enriquez Barrero, Talaial B. Alina, Jennifer N. Cha and Andrew P. Goodwin*,

引用次数: 0

IF 5.1

ACS Macro Letters Pub Date : 2025-07-15

引用次数: 0

IF 5.1

ACS Macro Letters Pub Date : 2025-07-15

Haley K. Beech, Kseniia M. Karnaukh, Madeleine E. Miyamoto, KeRay Chen, Jerrick Edmund, Javier Read de Alaniz*, Craig J. Hawker* and Rachel A. Segalman*,

引用次数: 0

IF 5.1

ACS Macro Letters Pub Date : 2025-07-15

Jan-Michael Y. Carrillo*, and , Yangyang Wang,

引用次数: 0

Nonconjugated Fumaric Acid-Based Polymers with Red-Emissive Clusteroluminescence 非共轭富马酸基红发簇发光聚合物。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-14 DOI: 10.1021/acsmacrolett.5c00252

Weida Zhu, Ting Li, Xuhui Zhang, Bihua Xia, Jing Huang, Shibo Wang, Yang Wang* and Weifu Dong,

{"title":"Nonconjugated Fumaric Acid-Based Polymers with Red-Emissive Clusteroluminescence","authors":"Weida Zhu, Ting Li, Xuhui Zhang, Bihua Xia, Jing Huang, Shibo Wang, Yang Wang* and Weifu Dong, ","doi":"10.1021/acsmacrolett.5c00252","DOIUrl":"10.1021/acsmacrolett.5c00252","url":null,"abstract":"The practical utilization of clusteroluminogens (CLgens) is fundamentally constrained by their inherent limitations in short-wavelength emission and low quantum yield (QY). Although conventional heteroatom doping strategies can facilitate charge transfer states, they often introduce structural complexity and exacerbate nonradiative energy dissipation. In this study, a series of terpolymers were successfully synthesized using maleic anhydride, fumaric acid, and vinyl acetate through a one-pot free radical polymerization. This method preserved the advantages of a simple linear structure while containing only oxygen heteroatoms, thereby eliminating the need for intricate molecular designs and avoiding heavy atom effects. The saturated carbon chain structure of fumaric acid, in combination with the formation of intermolecular hydrogen bonding, effectively modulated the flexibility of the polymer chains, enhanced through-space interactions between molecular chains, and promoted the stacking effect of cluster groups. These synergistic effects enabled red light emission and bimodal emission characteristics with a high QY, demonstrating the potential for controllable emission wavelength tuning. This study, based on well-defined linear polymers, not only presents a new strategy for designing high-efficiency, long-wavelength-emitting CLgens through chain structure modulation and hydrogen bonding but also expands the practical applications of CLgens in light-converting films and encryption technologies.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 8","pages":"1060–1067"},"PeriodicalIF":5.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer Sequence Alters Sensitivity and Resolution in Chemically Amplified Polypeptoid Photoresists 聚合物序列改变化学扩增多肽类光刻胶的灵敏度和分辨率。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-10 DOI: 10.1021/acsmacrolett.5c00320

Cameron P. Adams, Carolyn Henein, Xiangxi Meng, Chenyun Yuan, Javier Read de Alaniz, Christopher K. Ober and Rachel A. Segalman*,

{"title":"Polymer Sequence Alters Sensitivity and Resolution in Chemically Amplified Polypeptoid Photoresists","authors":"Cameron P. Adams, Carolyn Henein, Xiangxi Meng, Chenyun Yuan, Javier Read de Alaniz, Christopher K. Ober and Rachel A. Segalman*, ","doi":"10.1021/acsmacrolett.5c00320","DOIUrl":"10.1021/acsmacrolett.5c00320","url":null,"abstract":"Continuous progress in semiconductor technology relies on the ability to pattern transistors at sub-10 nm dimensions, necessitating the development of high-resolution photoresists for extreme ultraviolet (EUV) lithography. Chemically amplified resists, traditionally composed of multicomponent polymer systems, face increasing challenges at such patterning wavelengths due to nanoscale heterogeneity and stochastic defects. To address these limitations, this study explores polypeptoids, monodisperse, sequence-defined polymers─as a new class of photoresists with precise molecular control. Systematic variation of the polypeptoid chain length reveals a critical threshold necessary for successful pattern formation. Additionally, variations in monomer sequence strongly impact both photoresist sensitivity and feature fidelity, challenging conventional models that assume that sequence effects should average out across polymer chains. Finally, processing conditions such as postexposure bake temperature can be optimized to mitigate sequence-dependent variability. These results highlight polymer sequence as a powerful yet underexplored tool for tuning resist performance, offering a promising pathway toward improved nanoscale lithography.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 8","pages":"1055–1059"},"PeriodicalIF":5.2,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144594398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Commodity Polymer Functionalization by a Combination of Hydrogen Atom Transfer Reversible Addition–Fragmentation Chain Transfer Polymerization and Pentafluorophenyl-Ester-Ligation Chemistry 氢原子转移、可逆加成-破碎链转移聚合和五氟苯基酯-连接化学相结合的商品聚合物功能化研究。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-09 DOI: 10.1021/acsmacrolett.5c00368

Guanwen Huang, Zhuohan Wu, Yichen Liu, Lingjie Chang, Zhongming Wang, Xinghao Du, Binbin Xu, Zhongfan Jia* and Chun Feng*,

{"title":"Commodity Polymer Functionalization by a Combination of Hydrogen Atom Transfer Reversible Addition–Fragmentation Chain Transfer Polymerization and Pentafluorophenyl-Ester-Ligation Chemistry","authors":"Guanwen Huang, Zhuohan Wu, Yichen Liu, Lingjie Chang, Zhongming Wang, Xinghao Du, Binbin Xu, Zhongfan Jia* and Chun Feng*, ","doi":"10.1021/acsmacrolett.5c00368","DOIUrl":"10.1021/acsmacrolett.5c00368","url":null,"abstract":"Development of highly efficient and versatile strategies for functionalization of commodity polymers direct from carbon–hydrogen (C–H) bonds has attracted growing interest due to the ubiquity of C–H bonds in various commodity polymers and the great desire for upcycle of commodity polymers. However, the efficiency of C–H activation is usually low (<20%) and only one (potential) functional unit was introduced into each activated C–H bond. The low content of introduced functional units could be one great hindrance to the improvement of performance of resulting polymers. Herein we report a photocatalytic hydrogen atom transfer reversible addition–fragmentation chain transfer (HAT-RAFT) grafting polymerization strategy to introduce polymeric side chains of activated pentafluorophenyl esters (PFEs) into commodity polymers of poly(ethylene glycol), poly(propylene oxide), polybutylene, polypropylene, and poly(vinylpyrrolidone) by using the C–H bonds of commodity polymers as the initiating sites. The grafting polymerization of pentafluorophenyl acrylate (PFA) exhibits living/controlled features and temporal controllability. With the amplification effect of grafting polymerization, each activated C–H bond allows to the introduction of tens of PFEs, leading to a high content of PFE groups. Owing to the high reactivity of PFEs toward amino- and hydroxyl-containing molecules under mild conditions with excellent efficiency and group tolerance, the introduced PFEs of PPFA chains enable quantitative transesterification and amidation for efficient functionalization of commodity polymers via PFE-ligation chemistry.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 8","pages":"1038–1047"},"PeriodicalIF":5.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144586709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High Performance, Reprocessable, and Degradable Biobased Polyhydroxyurethane Vitrimers from an Imine-Containing Vanillin Dicyclocarbonate 高性能，可再加工，可降解的生物基聚羟基聚氨酯聚合物，从含亚胺的香草醛二环碳酸盐。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-09 DOI: 10.1021/acsmacrolett.5c00308

Yuanmeng Wang, Min Fan and Jingbo Zhao*,

{"title":"High Performance, Reprocessable, and Degradable Biobased Polyhydroxyurethane Vitrimers from an Imine-Containing Vanillin Dicyclocarbonate","authors":"Yuanmeng Wang, Min Fan and Jingbo Zhao*, ","doi":"10.1021/acsmacrolett.5c00308","DOIUrl":"10.1021/acsmacrolett.5c00308","url":null,"abstract":"Polyhydroxyurethane (PHU) is an emerging type of nonisocyanate polyurethane that is accessible by the aminolysis of cyclocarbonates (CCs) with amines. Biobased PHUs additionally conform to green, environmentally friendly, and sustainable development. Here, a five-membered vanillin di-CC with an imine group (VAI-5CC) was prepared through a cyclocarbonation of an imine-containing vanillin-tetraol with dimethyl carbonate under normal pressure, and the aminolysis of VAI-5CC with a triamine and hexanediamine or poly(propylene glycol) bis(2-aminopropyl ether) was explored. Several new biobased vanillin PHU vitrimers (CC-PHUs) with hydroxyurethane and imine (HU-IM) dual dynamic bonds were prepared successfully through this sustainable and green strategy. Aromatic vanillin units provide the CC-PHUs with excellent mechanical properties (storage modulus of 3.6–4.2 GPa and tensile strength of 74–106 MPa). HU-IM dual dynamic covalent bonds make the CC-PHUs easily reprocessed at a low temperature (110 °C). CC-PHUs were easily degraded under acidic conditions due to the presence of imine bonds.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 8","pages":"1048–1054"},"PeriodicalIF":5.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144594399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoparticle Percolation Improves the Mechanical Properties of Polymer Nanocomposite Films 纳米颗粒的渗透改善了聚合物纳米复合膜的力学性能。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-08 DOI: 10.1021/acsmacrolett.5c00258

Aria C. Zhang, Kohji Ohno and Russell J. Composto*,

{"title":"Nanoparticle Percolation Improves the Mechanical Properties of Polymer Nanocomposite Films","authors":"Aria C. Zhang, Kohji Ohno and Russell J. Composto*, ","doi":"10.1021/acsmacrolett.5c00258","DOIUrl":"10.1021/acsmacrolett.5c00258","url":null,"abstract":"Nanoparticle (NP) percolation governs the mechanical reinforcement of polymer nanocomposite (PNC) films. In this study, we demonstrate that both internal network morphology and near-surface morphology of NPs influence the mechanical properties of PNC films composed of poly(methyl methacrylate)-grafted silica nanoparticles (PMMA-NPs) in a poly(styrene-ran-acrylonitrile) (SAN) matrix. By systematically varying film thickness and annealing conditions, we achieve distinct NP morphologies, including continuous pillars, discrete pillars, clusters, and interconnected networks, each exhibiting different levels of NP percolation. Atomic force microscopy nanoindentation reveals that films with interconnected networks exhibit the highest reduced modulus (7.6 GPa), nearly quadrupling that of as-cast films with uniform NP dispersion (1.8 GPa), along with a substantial increase in hardness (624 MPa compared to 298 MPa). Notably, surface NP structures formed during annealing contribute to an enhanced modulus at low loads. These findings establish a direct structure–property relationship, providing insights into designing mechanically robust PNCs for applications in coatings, electronics, and energy storage.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 8","pages":"1032–1037"},"PeriodicalIF":5.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144586281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tough Hydrogels Designed for a Stretch-Induced Decrease in Electrical Resistance Using Tandem Host–Guest and Ionic Cross-Linking 使用串联主-客体和离子交联设计用于拉伸诱导电阻降低的坚韧水凝胶。

IF 5.2

ACS Macro Letters Pub Date : 2025-07-07 DOI: 10.1021/acsmacrolett.5c00347

May Myat Noe, Akihide Sugawara*, Yoshinori Takashima and Hiroshi Uyama*,

{"title":"Tough Hydrogels Designed for a Stretch-Induced Decrease in Electrical Resistance Using Tandem Host–Guest and Ionic Cross-Linking","authors":"May Myat Noe, Akihide Sugawara*, Yoshinori Takashima and Hiroshi Uyama*, ","doi":"10.1021/acsmacrolett.5c00347","DOIUrl":"10.1021/acsmacrolett.5c00347","url":null,"abstract":"Developing hydrogels that simultaneously exhibit mechanical toughness, interfacial adhesion, and a stretch-induced decline in electrical resistance remains a key challenge for soft and stretchable devices. Here, we present a supramolecular hydrogel system based on a tandem cross-linking strategy, formed through host–guest complexation between β-cyclodextrin (β-CD) and hydrophobic anions (TFSI– or NFO–), followed by sequential ionic interactions between anions and imidazolium polycations. The supramolecular hydrogels formed stable networks with enhanced mechanical strength, moderate swelling, and tunable adhesion, governed by the alkyl chain length of polycations, counteranions, and matrix polymers. Under tensile strain, the tandem cross-linked hydrogels exhibited a distinctive reduction in resistance, attributed to the sacrificial dissociation of dynamic cross-links that increase the anion mobility and facilitate ion transport. This supramolecular approach provides a versatile platform for designing robust, multifunctional hydrogels suited for mechanically demanding and stimuli-responsive applications with strong potential in flexible and wearable electronics.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"14 7","pages":"1019–1025"},"PeriodicalIF":5.2,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0