{"title":"催化 l-乳内酯开环聚合的镍(II)配合物的合成与表征","authors":"Xuhao Li, Manqi Zang, Lipeng Zhang, Wei Jiang, Xiuxian Zhao*, Xuchuan Jiang* and Wei Yao*, ","doi":"10.1021/acs.organomet.4c0029510.1021/acs.organomet.4c00295","DOIUrl":null,"url":null,"abstract":"<p >Industrial polylactide (PLA) production typically uses stannous octoate as a catalyst for lactide (LA) polymerization, which has drawback that PLA degradation caused by tin residual. This study explores the synthesis and application of tetradentate nitrogen-coordinated Ni(II) complexes (L<sup>1</sup>Ni–L<sup>4</sup>Ni) as alternative catalysts for the ring-opening polymerization of unpurified <span>l</span>-LA. The robust Ni(II) complexes were synthesized and characterized, and their catalytic performance was evaluated. Results indicated that in the presence of benzyl alcohol, the Ni(II) complexes demonstrated relatively good catalytic activity, achieving over 90% conversion of <span>l</span>-LA within 4 h. The polymerization reaction even can be operated in air without affecting the catalytic effect. The molecular weight of the resulting PLA showed a linear relationship with the [LA]/[Ni] ratio, indicating characteristics of living polymerization. The polymerization mechanism was proposed based on MALDI–TOF, NMR, FT-IR and DFT calculation.</p>","PeriodicalId":56,"journal":{"name":"Organometallics","volume":"43 22","pages":"2862–2871 2862–2871"},"PeriodicalIF":2.5000,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synthesis and Characterization of Nickel(II) Complexes for Catalyzing the Ring-Opening Polymerization of l-Lactide\",\"authors\":\"Xuhao Li, Manqi Zang, Lipeng Zhang, Wei Jiang, Xiuxian Zhao*, Xuchuan Jiang* and Wei Yao*, \",\"doi\":\"10.1021/acs.organomet.4c0029510.1021/acs.organomet.4c00295\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Industrial polylactide (PLA) production typically uses stannous octoate as a catalyst for lactide (LA) polymerization, which has drawback that PLA degradation caused by tin residual. This study explores the synthesis and application of tetradentate nitrogen-coordinated Ni(II) complexes (L<sup>1</sup>Ni–L<sup>4</sup>Ni) as alternative catalysts for the ring-opening polymerization of unpurified <span>l</span>-LA. The robust Ni(II) complexes were synthesized and characterized, and their catalytic performance was evaluated. Results indicated that in the presence of benzyl alcohol, the Ni(II) complexes demonstrated relatively good catalytic activity, achieving over 90% conversion of <span>l</span>-LA within 4 h. The polymerization reaction even can be operated in air without affecting the catalytic effect. The molecular weight of the resulting PLA showed a linear relationship with the [LA]/[Ni] ratio, indicating characteristics of living polymerization. The polymerization mechanism was proposed based on MALDI–TOF, NMR, FT-IR and DFT calculation.</p>\",\"PeriodicalId\":56,\"journal\":{\"name\":\"Organometallics\",\"volume\":\"43 22\",\"pages\":\"2862–2871 2862–2871\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-11-14\",\"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.4c00295\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organometallics","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.organomet.4c00295","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Synthesis and Characterization of Nickel(II) Complexes for Catalyzing the Ring-Opening Polymerization of l-Lactide
Industrial polylactide (PLA) production typically uses stannous octoate as a catalyst for lactide (LA) polymerization, which has drawback that PLA degradation caused by tin residual. This study explores the synthesis and application of tetradentate nitrogen-coordinated Ni(II) complexes (L1Ni–L4Ni) as alternative catalysts for the ring-opening polymerization of unpurified l-LA. The robust Ni(II) complexes were synthesized and characterized, and their catalytic performance was evaluated. Results indicated that in the presence of benzyl alcohol, the Ni(II) complexes demonstrated relatively good catalytic activity, achieving over 90% conversion of l-LA within 4 h. The polymerization reaction even can be operated in air without affecting the catalytic effect. The molecular weight of the resulting PLA showed a linear relationship with the [LA]/[Ni] ratio, indicating characteristics of living polymerization. The polymerization mechanism was proposed based on MALDI–TOF, NMR, FT-IR and DFT calculation.
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.
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