Samuel W. Kaplan, Matthew C. Satkowiak and Aleksandr V. Zhukhovitskiy*,
{"title":"Carbodiimide Ring-Opening Metathesis Polymerization and Depolymerization Using Terminal Iridium Imido Initiators","authors":"Samuel W. Kaplan, Matthew C. Satkowiak and Aleksandr V. Zhukhovitskiy*, ","doi":"10.1021/acs.organomet.5c00220","DOIUrl":null,"url":null,"abstract":"<p >Carbodiimide ring-opening polymerization (CDI-ROMP) enables chain growth of main-chain poly(CDI)s, which in principle could allow for control over the molecular weight, dispersity, and architecture of these polymers and their derivatives. However, thus far, chain transfer has limited this control. Herein, we describe the use of terminal iridium imido initiators, which reduce chain transfer in CDI-ROMP and improve the polymerization control: dispersities of ∼ 1.3 were achieved at complete monomer consumption, with even lower dispersities (1.1–1.2) at conversions below 85%, and the previously observed undershooting of theoretical molecular weight was avoided. Furthermore, we show that these initiators also enable depolymerization of poly(CDI)s to monomer with conversions of 50–60% under mild reaction conditions.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"44 17","pages":"1945–1950"},"PeriodicalIF":2.9000,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organometallics","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.organomet.5c00220","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Carbodiimide ring-opening polymerization (CDI-ROMP) enables chain growth of main-chain poly(CDI)s, which in principle could allow for control over the molecular weight, dispersity, and architecture of these polymers and their derivatives. However, thus far, chain transfer has limited this control. Herein, we describe the use of terminal iridium imido initiators, which reduce chain transfer in CDI-ROMP and improve the polymerization control: dispersities of ∼ 1.3 were achieved at complete monomer consumption, with even lower dispersities (1.1–1.2) at conversions below 85%, and the previously observed undershooting of theoretical molecular weight was avoided. Furthermore, we show that these initiators also enable depolymerization of poly(CDI)s to monomer with conversions of 50–60% under mild reaction conditions.
期刊介绍：
Organometallics is the flagship journal of organometallic chemistry and records progress in one of the most active fields of science, bridging organic and inorganic chemistry. The journal publishes Articles, Communications, Reviews, and Tutorials (instructional overviews) that depict research on the synthesis, structure, bonding, chemical reactivity, and reaction mechanisms for a variety of applications, including catalyst design and catalytic processes; main-group, transition-metal, and lanthanide and actinide metal chemistry; synthetic aspects of polymer science and materials science; and bioorganometallic chemistry.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
