ACS Macro Letters最新文献_第2页

Intrinsic Doping and Electrostatic Complexation of Sulfonated Poly(3,4-ethylenedioxythiophenes) (PEDOTs). 磺化聚（3,4-乙烯二氧噻吩）（PEDOTs）的本征掺杂和静电络合。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-21 DOI: 10.1021/acsmacrolett.5c00508

Hyunki Yeo,Anush Singhal,Alexandra Zele,Rachel A Segalman,Michael L Chabinyc

{"title":"Intrinsic Doping and Electrostatic Complexation of Sulfonated Poly(3,4-ethylenedioxythiophenes) (PEDOTs).","authors":"Hyunki Yeo,Anush Singhal,Alexandra Zele,Rachel A Segalman,Michael L Chabinyc","doi":"10.1021/acsmacrolett.5c00508","DOIUrl":"https://doi.org/10.1021/acsmacrolett.5c00508","url":null,"abstract":"Self-doped conjugated polymers represent a compelling strategy for forming conductive electrostatically complexed polymer blends without the need for additional processing steps for electronic doping. Although self-doped polymers simplify processing, fundamental questions remain about structure-property relationships and the role of doping in electrostatic complexation. A class of sulfonated PEDOT derivatives was investigated to study their self-doping behavior and the ability to form electrostatically mediated complexes with cationic polyelectrolytes. Remarkably, even a subtle change in side chain architecture (differing by only a single carbon) influenced the electrical conductivity, with the shorter side chain exhibiting values up to ≈500 S cm-1, roughly 1000 times higher than its longer-chain counterpart. Comprehensive spectroscopic and electrochemical analyses were performed to gain insight into the origin of the behavior. These self-doped conjugated polyelectrolytes maintain high electrical conductivity (≈300 S cm-1), even after complexation with an insulating polyelectrolyte. The phase behavior of complexation revealed the ability to define an effective charge fraction of ionic groups per monomer that can guide the design of electrostatically complex conjugated polyelectrolytes.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"26 1","pages":"1431-1438"},"PeriodicalIF":5.8,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093568","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

Modulation of Depolymerizable Poly(thioether-thioester) Properties in Reversible Covalent Composites. 可逆共价复合材料中可解聚聚硫醚-硫酯性能的调控。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-19 DOI: 10.1021/acsmacrolett.5c00422

Binoy Maiti,Mridula Nandi,Jaehyun Cho,Liang Yue,Kellie Stellmach,Blair Brettmann,Qi Jerry,Will Gutekunst,M G Finn

引用次数: 0

Incorporation of Visible Light-Responsive Push-Pull Azobenzene into Polymer Networks toward the Construction of Photodynamic Hydrogel Scaffolds. 在聚合物网络中加入可见光响应推拉偶氮苯以构建光动力水凝胶支架。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-19 DOI: 10.1021/acsmacrolett.5c00549

Itsuki Miyaguni,Kenta Homma,Michiya Matsusaki

{"title":"Incorporation of Visible Light-Responsive Push-Pull Azobenzene into Polymer Networks toward the Construction of Photodynamic Hydrogel Scaffolds.","authors":"Itsuki Miyaguni,Kenta Homma,Michiya Matsusaki","doi":"10.1021/acsmacrolett.5c00549","DOIUrl":"https://doi.org/10.1021/acsmacrolett.5c00549","url":null,"abstract":"Forces play vital roles in regulating cellular behavior, and integrins are prime examples that cells use to sense forces. Designer scaffolds have been developed to trigger integrin-mediated mechanotransduction to control cellular functions. However, current scaffolds lack spatiotemporal control of integrin mechanostimulation in a three-dimensional matrix. In this study, a photoresponsive hydrogel scaffold in which a cell-adhesive push-pull azobenzene was covalently loaded onto the hydrogel was synthesized. The cis-trans photoisomerization of azobenzene is expected to mechanostimulate the interaction of integrins with the cell-adhesive peptides (RGD peptide; arginine-glycine-aspartic acid) bound to azobenzene. The photoresponsive behavior of the synthesized azobenzene exhibited a photoresponse immediately after the on-off switching of blue light. The efficient cross-linking of azobenzene-bearing PEG through a click reaction allowed successful cell encapsulation in the azobenzene-bearing hydrogel. Taken together, the photoresponsive hydrogel scaffold is expected to find applications in controlling cellular behaviors in four dimensions via integrin-mediated mechanotransduction.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"79 1","pages":"1418-1424"},"PeriodicalIF":5.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145083601","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

Wrapping of Nano- and Microgels by Lipid-Bilayer Membranes. 脂质双层膜包裹纳米和微凝胶。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-18 DOI: 10.1021/acsmacrolett.5c00424

Tanwi Debnath,Jiarul Midya,Thorsten Auth,Gerhard Gompper

引用次数: 0

Shape Transformation of Poly(l-methionine sulfoxide)-b-poly(dehydroalanine) Vesicles 聚（l-蛋氨酸亚砜）-b-聚（脱氢丙氨酸）囊泡的形状转变

IF 5.8

ACS Macro Letters Pub Date : 2025-09-17 DOI: 10.1021/acsmacrolett.5c00527

Casey A. Morrison, Timothy J. Deming

引用次数: 0

Ultraviolet-Shielding Recyclable Polymer Film Fabricated via Knoevenagel Condensation. Knoevenagel缩合法制备可回收聚合物防紫外线膜。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-15 DOI: 10.1021/acsmacrolett.5c00423

Jiayi Chen,Yaowei Zhu,Keyu Chang,Xiaonong Zhang,Li Chen,Chunsheng Xiao

{"title":"Ultraviolet-Shielding Recyclable Polymer Film Fabricated via Knoevenagel Condensation.","authors":"Jiayi Chen,Yaowei Zhu,Keyu Chang,Xiaonong Zhang,Li Chen,Chunsheng Xiao","doi":"10.1021/acsmacrolett.5c00423","DOIUrl":"https://doi.org/10.1021/acsmacrolett.5c00423","url":null,"abstract":"Ultraviolet (UV) radiation presents serious risks to human health, materials, and the environment. UV-shielding materials play a vital role in health, industry, and environmental protection. Previously, we have developed a facile method to construct recyclable thermosetting polymer through the Knoevenagel condensation (KC) reaction. Herein, an ultraviolet-shielding recyclable film, P-TFMBTC-PCL, was fabricated through the KC reaction by introducing dynamic covalent bonds into the cross-linking network. We initially developed a cross-linking agent using vanillin and 1,3,5-benzenetricarbonyl chloride as starting materials. Subsequently, P-TFMBTC-PCL was synthesized through KC reaction of the cross-linking agent with polycaprolactone (PCL). In cyanoacetic acid end-modified PCL, active methylene groups react with aldehyde groups from the cross-linking agent to create dynamic C═C bonds. Consequently, this film exhibits an exceptionally tensile strength of 18.78 MPa and an elongation at break of 959.11%. Also, the dynamic exchange of dynamic C═C bonds confers both reprocessability and recyclability to the obtained thermosetting materials. Additionally, the C═C bonds expand the conjugation domain of the aromatic ring, endowing the film with ultraviolet resistance that blocks 100% of the ultraviolet rays from 200 to 432 nm. Overall, this dynamic networked film exhibits significant potential in the packaging, agriculture, and automotive industry.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"24 1","pages":"1402-1407"},"PeriodicalIF":5.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059224","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

Dynamics of Polymer Rings in Ring-Linear Blends by Neutron Spin Echo Spectroscopy. 用中子自旋回波光谱研究环形-线性共混体系中聚合物环的动力学。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-15 DOI: 10.1021/acsmacrolett.5c00507

Margarita Kruteva,Jürgen Allgaier,Michael Monkenbusch,Peter Falus,Katerina Peponaki,Dimitris Vlassopoulos,Dieter Richter

引用次数: 0

Bond-Reversibility Effects on Self-Crowding of Unimacromolecular Nano-Objects. 单大分子纳米物体自拥挤的键可逆性效应。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-11 DOI: 10.1021/acsmacrolett.5c00512

Ainara Ruiz-Bardillo,Isabel Asenjo-Sanz,Ester Verde-Sesto,Lionel Porcar,Joachim Kohlbrecher,José A Pomposo,Angel J Moreno,Arantxa Arbe,Juan Colmenero

{"title":"Bond-Reversibility Effects on Self-Crowding of Unimacromolecular Nano-Objects.","authors":"Ainara Ruiz-Bardillo,Isabel Asenjo-Sanz,Ester Verde-Sesto,Lionel Porcar,Joachim Kohlbrecher,José A Pomposo,Angel J Moreno,Arantxa Arbe,Juan Colmenero","doi":"10.1021/acsmacrolett.5c00512","DOIUrl":"https://doi.org/10.1021/acsmacrolett.5c00512","url":null,"abstract":"The scaling behavior of linear chains with reversible bonds and, in particular, its dependence on the concentration are fundamental problems of polymer physics that are not fully understood. By means of small-angle neutron scattering we investigate the conformations of reversibly bonding polymers from high dilution (where they form unimacromolecular nano-objects, usually known as single-chain nanoparticles) to crowded solutions and bulk state far above the overlap concentration (where they are expected to form a dynamic polymer network). Unlike the cases of simple linear chains with no bonds and of chains with strictly intramolecular irreversible bonds, no shrinkage is found, and the size and scaling exponent of the reversibly bonding polymers are essentially unperturbed by crowding. This is a relevant result that confirms the negligibility of many-body effects beyond the overlap concentration in crowded systems of reversibly bonding polymers and the validity of ultrasoft effective interactions for predicting their structural and phase behavior.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"67 1","pages":"1389-1395"},"PeriodicalIF":5.8,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145036041","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

Sulfone-Bond-Toughened Multifunctional Hydrogels with Ion-Modulated Fluorescence and Mechanical Properties. 具有离子调制荧光和力学性能的砜键增韧多功能水凝胶。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-09 DOI: 10.1021/acsmacrolett.5c00511

Shujing Lei,Meng Huo

引用次数: 0

Short-Time Relaxation and Anomalous Diffusion in Dynamic Covalent Networks. 动态共价网络中的短时弛豫和异常扩散。

IF 5.8

ACS Macro Letters Pub Date : 2025-09-09 DOI: 10.1021/acsmacrolett.5c00456

Hojin Kim,Kexin Li,Alex E Crolais,Stuart J Rowan

{"title":"Short-Time Relaxation and Anomalous Diffusion in Dynamic Covalent Networks.","authors":"Hojin Kim,Kexin Li,Alex E Crolais,Stuart J Rowan","doi":"10.1021/acsmacrolett.5c00456","DOIUrl":"https://doi.org/10.1021/acsmacrolett.5c00456","url":null,"abstract":"Introducing dynamic covalent chemistries into polymer networks allows access to complex linear viscoelasticity, owing to the reversible nature of the dynamic bonds. While this macroscopic mechanical behavior is influenced by the dynamic exchange of these chemistries, connecting the microscopic dynamics to the bulk properties is hindered by the time scale conventional techniques can observe. Here, light scattering passive microrheology is applied to probe short-time dynamics of dynamic covalent networks that consist of telechelic benzalcyanoacetate (BCA) Michael acceptors and thiol-functionalized cross-linkers. The mean-squared displacement of probe particles embedded in the dynamic covalent networks is analyzed to explore the microscopic short-term dynamics and relaxation behavior. A series of Michael acceptors with varying equilibrium constants when reacted with thiols confirms that the observed microscopic relaxation arises from the bond dissociation. The data suggest the particles undergo local superdiffusivity, suggesting that bond breaking and bond reformation exert external force on the probe particles driving this non-Brownian anomalous diffusion.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"35 1","pages":"1375-1381"},"PeriodicalIF":5.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145017988","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