{"id":1377,"date":"2020-02-07T11:13:00","date_gmt":"2020-02-07T10:13:00","guid":{"rendered":"http:\/\/www.microgels.rwth-aachen.de\/?p=1377"},"modified":"2020-02-07T11:41:20","modified_gmt":"2020-02-07T10:41:20","slug":"sfb-985-on-the-cover-of-chemistry","status":"publish","type":"post","link":"https:\/\/www.microgels.rwth-aachen.de\/?p=1377","title":{"rendered":"SFB 985 on the cover of Chemistry"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\">Undiscovered Potential: Ge Catalysts for Lactide Polymerization<\/h4>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><a href=\"http:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m-770x1024.jpg\" alt=\"\" class=\"wp-image-1378\" width=\"306\" height=\"407\" srcset=\"https:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m-770x1024.jpg 770w, https:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m-226x300.jpg 226w, https:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m-768x1021.jpg 768w, https:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/chem201904774-toc-0001-m.jpg 826w\" sizes=\"auto, (max-width: 306px) 100vw, 306px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>Polylactide (PLA) is a high potential bioplastic that can replace oil\u2010based 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\u2009\u00b0C. By systematical variation of the complex structure, proven by single\u2010crystal XRD and DFT calculations, structure\u2013property 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\u2013insertion mechanism to high molar mass polymers.<\/p>\n\n\n\n<p><em>Ruth D. Rittinghaus, Jakub Tremmel, Prof.\u2005Dr. Ales R\u016f\u017ei\u010dka, Christian Conrads, Pascal Albrecht, Dr. Alexander Hoffmann, Agnieszka N. Ksiazkiewicz, Prof.\u2005Dr. Andrij Pich, Prof.\u2005Dr. Roman Jambor, and Prof.\u2005Dr. Sonja Herres\u2010Pawlis<\/em><\/p>\n\n\n\n<p>DOI:  <a href=\"http:\/\/dx.doi.org\/10.1002\/chem.201903949\">10.1002\/chem.201903949<\/a> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Undiscovered Potential: Ge Catalysts for Lactide Polymerization Polylactide (PLA) is a high potential bioplastic that can replace oil\u2010based plastics in<\/p>\n","protected":false},"author":3,"featured_media":1381,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"categories":[26,6,36],"tags":[],"class_list":["post-1377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cover","category-featured","category-slider"],"author_meta":{"display_name":"Anna Eisele","author_link":"https:\/\/www.microgels.rwth-aachen.de\/?author=3"},"featured_img":"https:\/\/www.microgels.rwth-aachen.de\/wp-content\/uploads\/2020\/02\/SHP_Cover-300x169.jpg","coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/www.microgels.rwth-aachen.de\/?cat=26\" class=\"advgb-post-tax-term\">Cover<\/a>","<a href=\"https:\/\/www.microgels.rwth-aachen.de\/?cat=6\" class=\"advgb-post-tax-term\">Featured<\/a>","<a href=\"https:\/\/www.microgels.rwth-aachen.de\/?cat=36\" class=\"advgb-post-tax-term\">Slider<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Cover<\/span>","<span class=\"advgb-post-tax-term\">Featured<\/span>","<span class=\"advgb-post-tax-term\">Slider<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Posted 6 years ago","modified":"Updated 6 years ago"},"absolute_dates":{"created":"Posted on February 7, 2020","modified":"Updated on February 7, 2020"},"absolute_dates_time":{"created":"Posted on February 7, 2020 11:13","modified":"Updated on February 7, 2020 11:41"},"featured_img_caption":"","series_order":"","_links":{"self":[{"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/posts\/1377","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1377"}],"version-history":[{"count":1,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/posts\/1377\/revisions"}],"predecessor-version":[{"id":1380,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/posts\/1377\/revisions\/1380"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=\/wp\/v2\/media\/1381"}],"wp:attachment":[{"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.microgels.rwth-aachen.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}