ACS Macro Letters最新文献_第10页

Correction to “Cross-Linked Polyolefins through Tandem ROMP/Hydrogenation” 更正“通过串联ROMP/加氢交联聚烯烃”

IF 5.8

ACS Macro Letters Pub Date : 2024-12-09 DOI: 10.1021/acsmacrolett.4c00775

Caitlin S. Sample, Brenden D. Hoehn, Marc A. Hillmyer

引用次数: 0

Correction to “Cross-Linked Polyolefins through Tandem ROMP/Hydrogenation”

IF 5.1

ACS Macro Letters Pub Date : 2024-12-09 DOI: 10.1021/acsmacrolett.4c0077510.1021/acsmacrolett.4c00775

Caitlin S. Sample, Brenden D. Hoehn and Marc A. Hillmyer*,

引用次数: 0

Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets 热固性聚合物闭环解聚直接回收单体

IF 5.1

ACS Macro Letters Pub Date : 2024-12-07 DOI: 10.1021/acsmacrolett.4c0066510.1021/acsmacrolett.4c00665

Chihui Zheng, Gadi Slor, Youwei Ma* and Francesco Stellacci*,

{"title":"Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets","authors":"Chihui Zheng, Gadi Slor, Youwei Ma* and Francesco Stellacci*, ","doi":"10.1021/acsmacrolett.4c0066510.1021/acsmacrolett.4c00665","DOIUrl":"https://doi.org/10.1021/acsmacrolett.4c00665https://doi.org/10.1021/acsmacrolett.4c00665","url":null,"abstract":"Recovering monomers from the depolymerization of thermosets presents a significant challenge, which becomes even more daunting if one sets the goal of doing it directly, i.e., without complex chemical separation steps. To this end, we have synthesized a new type of polycarbonate thermoset by first copolymerizing alkyl cyclic carbonates (ACCs) with small amounts of allyloxy cyclic carbonates (AoCCs), followed by cross-linking the resulting allyloxy polycarbonate with excess tetrathiol compounds under UV irradiation. These cross-linked polycarbonates demonstrate enhanced thermal and mechanical properties compared to their linear analogues, while maintaining the linear polymers’ capacity for ring-closing depolymerization. The depolymerization process enables the direct recovery of ACC and its dimer, bypassing complex chemical separation steps that are commonly employed in the recycling of conventional chemically recyclable thermosets. The yields range from 74.7% to 91.7% depending on the ratios of AoCC to ACC in the thermosets. Furthermore, the recovered compounds can be repolymerized with AoCCs leading to polycarbonate of the same quality to the initially synthesized one.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"13 12","pages":"1704–1710 1704–1710"},"PeriodicalIF":5.1,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmacrolett.4c00665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets 热固性聚合物闭环解聚直接回收单体

IF 5.8

ACS Macro Letters Pub Date : 2024-12-07 DOI: 10.1021/acsmacrolett.4c00665

Chihui Zheng, Gadi Slor, Youwei Ma, Francesco Stellacci

{"title":"Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets","authors":"Chihui Zheng, Gadi Slor, Youwei Ma, Francesco Stellacci","doi":"10.1021/acsmacrolett.4c00665","DOIUrl":"https://doi.org/10.1021/acsmacrolett.4c00665","url":null,"abstract":"Recovering monomers from the depolymerization of thermosets presents a significant challenge, which becomes even more daunting if one sets the goal of doing it directly, i.e., without complex chemical separation steps. To this end, we have synthesized a new type of polycarbonate thermoset by first copolymerizing alkyl cyclic carbonates (ACCs) with small amounts of allyloxy cyclic carbonates (AoCCs), followed by cross-linking the resulting allyloxy polycarbonate with excess tetrathiol compounds under UV irradiation. These cross-linked polycarbonates demonstrate enhanced thermal and mechanical properties compared to their linear analogues, while maintaining the linear polymers’ capacity for ring-closing depolymerization. The depolymerization process enables the direct recovery of ACC and its dimer, bypassing complex chemical separation steps that are commonly employed in the recycling of conventional chemically recyclable thermosets. The yields range from 74.7% to 91.7% depending on the ratios of AoCC to ACC in the thermosets. Furthermore, the recovered compounds can be repolymerized with AoCCs leading to polycarbonate of the same quality to the initially synthesized one.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"220 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788623","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

Highly Ordered Bimodal Mesoporous Carbon from ABC Triblock Terpolymers with Phenolic Resol 具有酚醛树脂的ABC三嵌段三元聚合物的高有序双峰介孔碳

IF 5.8

ACS Macro Letters Pub Date : 2024-12-05 DOI: 10.1021/acsmacrolett.4c00651

Yuta Miyamori, Youngwon Kong, Yuta Nabae, Kan Hatakeyama-Sato, Teruaki Hayakawa

引用次数: 0

Highly Ordered Bimodal Mesoporous Carbon from ABC Triblock Terpolymers with Phenolic Resol 具有酚醛树脂的ABC三嵌段三元聚合物的高有序双峰介孔碳

IF 5.1

ACS Macro Letters Pub Date : 2024-12-05 DOI: 10.1021/acsmacrolett.4c0065110.1021/acsmacrolett.4c00651

Yuta Miyamori, Youngwon Kong, Yuta Nabae, Kan Hatakeyama-Sato and Teruaki Hayakawa*,

{"title":"Highly Ordered Bimodal Mesoporous Carbon from ABC Triblock Terpolymers with Phenolic Resol","authors":"Yuta Miyamori, Youngwon Kong, Yuta Nabae, Kan Hatakeyama-Sato and Teruaki Hayakawa*, ","doi":"10.1021/acsmacrolett.4c0065110.1021/acsmacrolett.4c00651","DOIUrl":"https://doi.org/10.1021/acsmacrolett.4c00651https://doi.org/10.1021/acsmacrolett.4c00651","url":null,"abstract":"Mesoporous carbons (MPCs) with a bimodal distribution of pore diameters are more advantageous than their monomodal counterparts for applications in adsorption, catalysis, and drug delivery systems; however, reports on their fabrication remain limited. In this study, we successfully fabricated bimodal MPCs using a soft template method with poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA)-b-poly(4-vinylpyridine) (P4VP)-b-polystyrene (PS) and resol. The blend samples formed microphase-separated structures comprising PTFEMA spheres, PS cylinders, and matrix domains composed of P4VP and resol, leading to the separation of the PTFEMA and PS domains. The P4VP and resol matrix domains were carbonized at a high temperature of 900 °C, whereas the PTFEMA and PS domains were thermally decomposed. This process resulted in bimodal MPCs with both spherical and cylindrical mesopores. The pore diameters calculated using scanning electron microscopy were approximately 10 and 30 nm, while nitrogen adsorption measurements indicated a large specific surface area with a bimodal pore distribution.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"13 12","pages":"1698–1703 1698–1703"},"PeriodicalIF":5.1,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmacrolett.4c00651","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rational Design of Self-Reporting Polymersomes for the Controlled Release of Sulfur Dioxide 二氧化硫控制释放的自报告聚合体的合理设计

IF 5.1

ACS Macro Letters Pub Date : 2024-11-27 DOI: 10.1021/acsmacrolett.4c0068710.1021/acsmacrolett.4c00687

Zhezhe Li, Yue Zhang, Suzhen Wang, Yihan Wu and Hailong Che*,

{"title":"Rational Design of Self-Reporting Polymersomes for the Controlled Release of Sulfur Dioxide","authors":"Zhezhe Li, Yue Zhang, Suzhen Wang, Yihan Wu and Hailong Che*, ","doi":"10.1021/acsmacrolett.4c0068710.1021/acsmacrolett.4c00687","DOIUrl":"https://doi.org/10.1021/acsmacrolett.4c00687https://doi.org/10.1021/acsmacrolett.4c00687","url":null,"abstract":"As a new member of the gaseous regulators, sulfur dioxide (SO2) plays a crucial role in many biological activities. Recent studies have shown that SO2 is capable of inducing cancer cell apoptosis by regulating intracellular reactive oxygen species (ROS), allowing SO2 to serve as an efficient therapeutic agent. Although various polymer-based platforms have presented great potential for the controlled release of SO2, most of the systems are incapable of monitoring the intracellular generation of SO2. In this work we present the rational design of SO2-releasing biodegradable polymersomes, accompanied by a self-reporting property. The polymersome consists of a hydrophilic block of poly(ethylene glycol) (PEG) and a hydrophobic segment of poly(trimethylene carbonate) (PTMC)-based SO2 donors. The polymersomes not only exhibit good SO2-releasing performance upon treatment with glutathione (GSH), but can also regulate the fluorescence change of the system, offering a good platform for real-time monitoring of the intracellular production of SO2. Significantly, the in vitro and in vivo studies indicate the potential for exploitation of these polymersomes as antitumor agents. We expect that incorporating both the SO2-releasing capacity and self-reporting feature within a polymersome system will provide a unique opportunity for the development of intelligent gas nanovehicles.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"13 12","pages":"1691–1697 1691–1697"},"PeriodicalIF":5.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850626","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

Rational Design of Self-Reporting Polymersomes for the Controlled Release of Sulfur Dioxide 合理设计用于控制二氧化硫释放的自报告聚合体

IF 5.8

ACS Macro Letters Pub Date : 2024-11-27 DOI: 10.1021/acsmacrolett.4c00687

Zhezhe Li, Yue Zhang, Suzhen Wang, Yihan Wu, Hailong Che

{"title":"Rational Design of Self-Reporting Polymersomes for the Controlled Release of Sulfur Dioxide","authors":"Zhezhe Li, Yue Zhang, Suzhen Wang, Yihan Wu, Hailong Che","doi":"10.1021/acsmacrolett.4c00687","DOIUrl":"https://doi.org/10.1021/acsmacrolett.4c00687","url":null,"abstract":"As a new member of the gaseous regulators, sulfur dioxide (SO2) plays a crucial role in many biological activities. Recent studies have shown that SO2 is capable of inducing cancer cell apoptosis by regulating intracellular reactive oxygen species (ROS), allowing SO2 to serve as an efficient therapeutic agent. Although various polymer-based platforms have presented great potential for the controlled release of SO2, most of the systems are incapable of monitoring the intracellular generation of SO2. In this work we present the rational design of SO2-releasing biodegradable polymersomes, accompanied by a self-reporting property. The polymersome consists of a hydrophilic block of poly(ethylene glycol) (PEG) and a hydrophobic segment of poly(trimethylene carbonate) (PTMC)-based SO2 donors. The polymersomes not only exhibit good SO2-releasing performance upon treatment with glutathione (GSH), but can also regulate the fluorescence change of the system, offering a good platform for real-time monitoring of the intracellular production of SO2. Significantly, the in vitro and in vivo studies indicate the potential for exploitation of these polymersomes as antitumor agents. We expect that incorporating both the SO2-releasing capacity and self-reporting feature within a polymersome system will provide a unique opportunity for the development of intelligent gas nanovehicles.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"258 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142718897","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

A Macrocycle-Mediated Protein Cage 大环介导的蛋白笼

IF 5.1

ACS Macro Letters Pub Date : 2024-11-26 DOI: 10.1021/acsmacrolett.4c0065610.1021/acsmacrolett.4c00656

Ronan J. Flood, Aurélien Thureau and Peter B. Crowley*,

引用次数: 0

A Macrocycle-Mediated Protein Cage 大循环介导的蛋白质笼

IF 5.8

ACS Macro Letters Pub Date : 2024-11-26 DOI: 10.1021/acsmacrolett.4c00656

Ronan J. Flood, Aurélien Thureau, Peter B. Crowley

引用次数: 0