Neutral Bidendate Guanidine-Based Zinc Complexes for the Ring Opening Polymerization of Lactide

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dc.contributor.advisorLavoie, Gino G.
dc.contributor.authorKhan, Brandon Sharaz
dc.date.accessioned2022-12-14T16:18:53Z
dc.date.available2022-12-14T16:18:53Z
dc.date.copyright2022-04-12
dc.date.issued2022-12-14
dc.date.updated2022-12-14T16:18:53Z
dc.degree.disciplineChemistry
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractHerein is reported the synthesis and structure elucidation of three novel zinc complexes bearing neutral bidentate guanidine ligands for the ring opening polymerization (ROP) of lactide to PLA. Ligand and complex structures were obtained computationally and leveraged against single-crystal studies to develop a method for predicting solid state structures of future complexes. The catalysts were tested for ring opening polymerization of lactide to PLA. The most active complex displayed a rate constant for propagation, kp, of 26 M-1h-1. The catalyst showed some stereoselectivity with a heterotactic bias in the polymer (Pr = 0.60). The polymer number average molecular weight was determined to be ~4700 g mol-1. The end analysis of the MALDI-TOF mass spectrum suggested water activation for the polymerization. The polydispersity index of the polymer was determined by gel permeation chromatography to be 1.10, indicating a well-behaved polymerization.
dc.identifier.urihttp://hdl.handle.net/10315/40601
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectChemistry
dc.subjectInorganic chemistry
dc.subjectMaterials Science
dc.subject.keywordsGuanidine
dc.subject.keywordsZinc
dc.subject.keywordsNHC
dc.subject.keywordsModular
dc.subject.keywordsPLA
dc.subject.keywordsPoly(lactic)acid
dc.subject.keywordsBiodegradable
dc.subject.keywordsGreen
dc.subject.keywordsElectron-poor
dc.subject.keywordsPi-acidic
dc.subject.keywordsVariable temperature
dc.subject.keywordsComputational chemistry
dc.subject.keywordsDFT
dc.titleNeutral Bidendate Guanidine-Based Zinc Complexes for the Ring Opening Polymerization of Lactide
dc.typeElectronic Thesis or Dissertation

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