Publication detail

Undiscovered Potential: Ge Catalysts for Lactide Polymerization

Year: 2020

Type of publication: článek v odborném periodiku

Name of source: Chemistry - A European Journal

Publisher name: Wiley-VCH

Place: Weinheim

Page from-to: 212 – 221

Titles:

Language	Name	Abstract	Keywords
cze	Ge katalyzátory pro polymerizaci laktidů	Byly připraveny a studovány nové katalyzátory na bázi germylénů. Tyt sloučeniny byly testovány jako katalyzátory polymerizace laktidů.	katalyzátory; polymerizace laktidů
eng	Undiscovered Potential: Ge Catalysts for Lactide Polymerization	Polylactide (PLA) is a high potential bioplastic that can replace oil-based plastics in a number of applications. To date, in spite of its known toxicity, a tin catalyst is used on industrial scale which should be replaced by a benign catalyst in the long run. Germanium is known to be unharmful while having similar properties as tin. Only few germylene catalysts are known so far and none has shown the potential for industrial application. We herein present Ge complexes in combination with zinc and copper, which show amazingly high polymerization activities for lactide in bulk at 150 degrees C. By systematical variation of the complex structure, proven by single-crystal XRD and DFT calculations, structure-property relationships are found regarding the polymerization activity. Even in the presence of zinc and copper, germanium acts as the active site for polymerizing probably through the coordination-insertion mechanism to high molar mass polymers.	bioplastics; germanium; lactide; ring-opening polymerization; zinc

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