Results 11 to 20 of about 1,640 (146)

Effective Ligand Design: Zinc Complexes with Guanidine Hydroquinoline Ligands for Fast Lactide Polymerization and Chemical Recycling. [PDF]

open access: yesChemSusChem, 2022
Specific design: Using a hydroquinoline backbone for zinc guanidine complexes in the ring‐opening polymerization of lactide results in an enormous activity increase compared to their aromatic counterparts. Not only is the complex very active in the polymerization of lactide, but it also catalyzes the chemical recycling process of solvolysis.
Hermann A   +4 more
europepmc   +2 more sources

A Multitool for Circular Economy: Fast Ring‐Opening Polymerization and Chemical Recycling of (Bio)polyesters Using a Single Aliphatic Guanidine Carboxy Zinc Catalyst

open access: yesChemSusChem, Volume 16, Issue 12, June 22, 2023., 2023
Complex as multitool: A new aliphatic N,O‐guanidine ligand and its ZnCl2 complex are presented. The complex shows high catalytic activity towards both ring‐opening polymerization of lactide in the monomer melt and methanolysis of polylactide, as well as other (bio)polyesters.
Martin Fuchs   +7 more
wiley   +1 more source

Open Loop Recycling – Guanidine Iron(II) Polymerization Catalyst for the Depolymerization of Polylactide

open access: yesChemistry – An Asian Journal, Volume 18, Issue 5, March 1, 2023., 2023
Versatile Allrounder: We report the first iron catalyst active in the selective alcoholysis and aminolysis of PLA using different nucleophiles. Having the increasing plastic waste problem and the acute danger imposed by climate change in mind solvent‐free alcoholysis and catalyst recycling were investigated.
Lisa Burkart   +3 more
wiley   +1 more source

Taking the Next Step—Model‐Based Analysis of Robust and Non‐Toxic Zn Catalysts for the Ring Opening Polymerization of Lactide in the Polymer Melt

open access: yesAdvanced Sustainable Systems, Volume 7, Issue 2, February 2023., 2023
This article reports the development of a simulation model for the ring‐opening polymerization of lactide with nontoxic “asme”‐type Zn catalysts. The influences of various input parameters are investigated experimentally and model‐based. The generality of the developed model for other “asme”‐type Zn catalysts is validated with a second catalyst ...
Niclas Conen   +4 more
wiley   +1 more source

Geometrical benchmarking and analysis of redox potentials of copper(I/II) guanidine‐quinoline complexes: Comparison of semi‐empirical tight‐binding and DFT methods and the challenge of describing the entatic state (part III)

open access: yesJournal of Computational Chemistry, Volume 44, Issue 3, Page 319-328, January 30, 2023., 2023
Geometrical Benchmarking and Analysis of Redox Potentials of Copper(I/II) Guanidine‐Quinoline Complexes: Comparison of semi‐empirical tight‐binding and DFT methods and the challenge of describing the entatic state (Part III). The geometry optimization and the calculation of the redox potential of five real‐life model complex pairs (up to 50 non ...
Lukas Raßpe‐Lange   +5 more
wiley   +1 more source

Das RADAR Projekt: Datenarchivierung und -publikation als Dienstleistung - disziplinübergreifend, nachhaltig, kostendeckend

open access: yeso-bib. Das offene Bibliotheksjournal, 2014
Die Nachvollziehbarkeit und Reproduzierbarkeit wissenschaftlicher Erkenntnisse basiert zunehmend auf digitalen Daten. Deren Publikation, Verfügbarkeit und Nachnutzung muss im Rahmen guter wissenschaftlicher Praxis gewährleistet werden.
Matthias Razum, Janna Neumann
doaj   +1 more source

Dauerhafter Zugriff auf digitale Publikationen – das DFG-Projekt NatHosting

open access: yeso-bib. Das offene Bibliotheksjournal, 2015
Das Arbeiten mit digitalen Veröffentlichungen und Daten in Forschung, Lehre und Studium erfordert eine kontinuierliche und möglichst störungsfreie Verfügbarkeit dieser Inhalte.
Hildegard Schäffler   +2 more
doaj   +1 more source

Web Site Controlling [PDF]

open access: yes, 1999
Ein Unternehmen zeigt seine eBusiness-Präsenz anhand einer unternehmenseigenen Web Site, über die die eBusiness-Aktivitäten des Unternehmens abgewickelt werden.
Beiser, Armin, Schwickert, Axel C.
core   +1 more source

Qualität durch Kooperation: UR Library Services

open access: yeso-bib. Das offene Bibliotheksjournal, 2023
Die UR Library Services der Universitätsbibliothek Regensburg führen unter dem Leitgedanken „Qualität durch Kooperation“ die seit Jahren etablierten kooperativen Bibliotheksservices Datenbank-Infosystem (DBIS), Elektronische Zeitschriftenbibliothek (EZB)
Brigitte Doß   +3 more
doaj   +1 more source

Die Reform der Informationsinfrastrukturen als Governance-Problem [PDF]

open access: yes, 2016
Die von der Gemeinsamen Wissenschaftskonferenz, dem Wissenschaftsrat und der Deutschen Forschungsgemeinschaft initiierte und im Koalitionsvertrag der Bundesregierung verankerte Reform der Informationsinfrastrukturen ist ein hochkomplexes Vorhaben, das ...
Reuter, Peter
core   +1 more source

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