Shweta Sagar, Priyanku Nath, Shiva Lall Sunar, Aranya Ray, Mridula Choudhary, Alok Sarkar, Saurabh K. Singh and Tarun K. Panda
{"title":"用无金属催化剂通过非共价相互作用绿色合成聚ε-己内酯","authors":"Shweta Sagar, Priyanku Nath, Shiva Lall Sunar, Aranya Ray, Mridula Choudhary, Alok Sarkar, Saurabh K. Singh and Tarun K. Panda","doi":"10.1039/D4GC04411H","DOIUrl":null,"url":null,"abstract":"<p >The ring-opening polymerization (ROP) of ε-caprolactone (CL) catalyzed by a metal-free initiator <em>N</em>,<em>N</em>′-dibutyl-<em>N</em>,<em>N</em>,<em>N</em>′,<em>N</em>′-tetramethylethane1,2-diammonium bromide [<small><sup><em>n</em></sup></small>BuMe<small><sub>2</sub></small>NCH<small><sub>2</sub></small>CH<small><sub>2</sub></small>N<small><sup><em>n</em></sup></small>BuMe<small><sub>2</sub></small>]Br<small><sub>2</sub></small> (DBTMEDA)Br<small><sub>2</sub></small> has been investigated. The catalyst (DBTMEDA)Br<small><sub>2</sub></small> promotes polymerization under mild conditions without any external initiator. Polymerization was demonstrated in a controlled and living manner, producing PCLs with a precisely controlled molecular weight of up to 50 kDa with narrow polydispersity. Density Functional Theory (DFT) calculations indicated the involvement of a C–H⋯O type non-covalent interaction between DBTMEDA cations and the carbonyl group of ε-CL in the monomer activation step. Remarkably, DBTMEDA can also be easily recovered and reused for up to six consecutive cycles without an appreciable decrease in catalytic activity.</p>","PeriodicalId":78,"journal":{"name":"Green Chemistry","volume":" 2","pages":" 527-534"},"PeriodicalIF":9.3000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Green synthesis of poly ε-caprolactone using a metal-free catalyst via non-covalent interactions†\",\"authors\":\"Shweta Sagar, Priyanku Nath, Shiva Lall Sunar, Aranya Ray, Mridula Choudhary, Alok Sarkar, Saurabh K. Singh and Tarun K. Panda\",\"doi\":\"10.1039/D4GC04411H\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >The ring-opening polymerization (ROP) of ε-caprolactone (CL) catalyzed by a metal-free initiator <em>N</em>,<em>N</em>′-dibutyl-<em>N</em>,<em>N</em>,<em>N</em>′,<em>N</em>′-tetramethylethane1,2-diammonium bromide [<small><sup><em>n</em></sup></small>BuMe<small><sub>2</sub></small>NCH<small><sub>2</sub></small>CH<small><sub>2</sub></small>N<small><sup><em>n</em></sup></small>BuMe<small><sub>2</sub></small>]Br<small><sub>2</sub></small> (DBTMEDA)Br<small><sub>2</sub></small> has been investigated. The catalyst (DBTMEDA)Br<small><sub>2</sub></small> promotes polymerization under mild conditions without any external initiator. Polymerization was demonstrated in a controlled and living manner, producing PCLs with a precisely controlled molecular weight of up to 50 kDa with narrow polydispersity. Density Functional Theory (DFT) calculations indicated the involvement of a C–H⋯O type non-covalent interaction between DBTMEDA cations and the carbonyl group of ε-CL in the monomer activation step. Remarkably, DBTMEDA can also be easily recovered and reused for up to six consecutive cycles without an appreciable decrease in catalytic activity.</p>\",\"PeriodicalId\":78,\"journal\":{\"name\":\"Green Chemistry\",\"volume\":\" 2\",\"pages\":\" 527-534\"},\"PeriodicalIF\":9.3000,\"publicationDate\":\"2024-11-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Green Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/gc/d4gc04411h\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Green Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/gc/d4gc04411h","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Green synthesis of poly ε-caprolactone using a metal-free catalyst via non-covalent interactions†
The ring-opening polymerization (ROP) of ε-caprolactone (CL) catalyzed by a metal-free initiator N,N′-dibutyl-N,N,N′,N′-tetramethylethane1,2-diammonium bromide [nBuMe2NCH2CH2NnBuMe2]Br2 (DBTMEDA)Br2 has been investigated. The catalyst (DBTMEDA)Br2 promotes polymerization under mild conditions without any external initiator. Polymerization was demonstrated in a controlled and living manner, producing PCLs with a precisely controlled molecular weight of up to 50 kDa with narrow polydispersity. Density Functional Theory (DFT) calculations indicated the involvement of a C–H⋯O type non-covalent interaction between DBTMEDA cations and the carbonyl group of ε-CL in the monomer activation step. Remarkably, DBTMEDA can also be easily recovered and reused for up to six consecutive cycles without an appreciable decrease in catalytic activity.
期刊介绍：
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.
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