Cyclic polylactide synthesis initiated by a lithium anthraquinoid: understanding the selectivity through DFT and diffusion NMR

文献情報

出版日 2021-07-07

DOI 10.1039/D1PY00547B

インパクトファクター 5.582

著者

Cristina Ruiz Martínez, Juana M. Pérez, Francisco M. Arrabal-Campos, María Batuecas, Ignacio Fernández

原文を見る

要旨

We report herein the first lithium anthraquinoid catalyst able to produce polylactide at room temperature starting from both L- and rac-lactide in the absence of any other initiator. The new lithium-based system is selective towards cyclic polymers, having narrow dispersity and weight-average molecular weights ranging from 49.5 to 137.6 kDa. The cyclic structure of the PLA generated from the lithium catalyst has been determined by a combination of 1H NMR and DRIFT spectroscopy techniques and MALDI-TOF mass spectrometry. DFT calculations point to lithium aggregation as the key feature of the catalyst controlling the linear : cyclic polymer ratio. Molar mass distributions and dispersities were obtained through diffusion NMR experiments combined with inverse Laplace transform algorithms and compared with those obtained by SEC as the most established method.

掲載誌

Polymer Chemistry

CiteScore: 8.6

自己引用率: 7.3%

年間論文数: 457

Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.

Cyclic polylactide synthesis initiated by a lithium anthraquinoid: understanding the selectivity through DFT and diffusion NMR

文献情報

おすすめジャーナル

関連文献

DABCO-catalyzed silver-promoted direct thiolation of pyrazolones with diaryl disulfides

Supramolecular fluorescence sensing of l-proline and l-pipecolic acid

Synthesis and structural investigation of a series of mannose-containing oligosaccharides using mass spectrometry

Synthesis of spiro-tetrahydrothiopyran-oxindoles by Michael–aldol cascade reactions: discovery of potential P53-MDM2 inhibitors with good antitumor activity

Recent advances in annulation reactions based on zwitterionic π-allyl palladium and propargyl palladium complexes

Catalytic enantioselective synthesis of carboxy-substituted 2-isoxazolines by cascade oxa-Michael-cyclization

Synthesis of unnatural α-amino acid derivatives via selective o-C–H functionalization

Synthesis and characterization of water-soluble macrocyclic peptides stabilizing protein α-turn

Negishi cross-couplings in the synthesis of amino acids

Bioluminescent probe for detecting endogenous hypochlorite in living mice

こちらもおすすめ

カルボニル基が付いた5-氰基-1-{[(2-メチル-2-プロpanyl)オキシ]カーボンイル}1H-吲哚-2-イリド-2-ボリン酸はどのように保存すればよいですか？

tert-ブチル2-クロロメチルピリジン-3-基炭酸エステルの市場動向や研究トレンドはどうですか？

聚二季戊四醇六丙烯酸酯はどの業界で使用されていますか？

1-氯-5-硝基异喹啉の市場動向や研究トレンドはどうですか？

2-チロール-5-メチルスルフェニル-3-trifルオルメチルベンゼンはどのように合成されますか？

p-トールイルマグネシウムブロミドの物理化学的性質は何ですか？

1-(5-甲基-2-硫化素基)プロパン-1-酮の市場動向や研究トレンドはどうですか？

十一碳烯酰甘氨酸を取り扱う際の実験室安全事項は何ですか？

1H,1H-全氟-3,6-二氧杂葵-1-醇を取り扱う際の実験室安全事項は何ですか？

3-(4-(フルオロメチルオキシ)フェニル)-1,2,4-オキサジアゾール-5-カルボハイドライドは安全ですか？

掲載誌

Polymer Chemistry

おすすめ化合物

Ethanone, 1-[4-chloro-2-(methylthio)-5-pyrimidinyl]-

7-Bromo-5-chloro-1H-pyrazolo[4,3-b]pyridine

N-[(6-Bromo-3-pyridinyl)methyl]ethanamine

methyl 6-bromo-3-formyl-1H-indole-4-carboxylate

Trigoxyphin A

おすすめサプライヤー