dc.contributor.author | Obuah, Collins | |
dc.contributor.author | Jordaan, Johan H.L. | |
dc.contributor.author | Otto, Daniel P. | |
dc.contributor.author | Lochee, Yemanlall | |
dc.contributor.author | Zinyemba, Orpah | |
dc.date.accessioned | 2016-09-06T10:53:30Z | |
dc.date.available | 2016-09-06T10:53:30Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Obuah, C. et al. 2015. (Ferrocenylpyrazolyl)zinc(II) acetate complexes as initiators and catalysts for the ring opening polymerization of ϵ-caprolacton. Journal of molecular catalysis A, 406:185-193. [https://doi.org/10.1016/j.molcata.2015.05.021] | en_US |
dc.identifier.issn | 1381-1169 | |
dc.identifier.issn | 1873-314X (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/18553 | |
dc.identifier.uri | https://doi.org/10.1016/j.molcata.2015.05.021 | |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S1381116915002058 | |
dc.description.abstract | The reaction of Zn(OAc)2 with 3-ferrocenylpyrazol-1-ylmethylenepyridine (L1), 3-ferrocenyl-5-methylpyrazol-1-ylmethylenepyridine (L2), 3-ferrocenylpyrazol-1-ylethylamine (L3) and 3-ferrocenyl-5-pyrazol-1-ylethylamine (L4) afford the corresponding zinc complexes [Zn(CH3COO)2(L1)] (1), [Zn(CH3COO)2(L2)] (2), [Zn(CH3COO)2(L3)] (3), and [Zn(CH3COO)2(L4)] (4). These zinc complexes behave as catalysts or initiators for the ring opening polymerization of ϵ-caprolactone, depending on the nature of the ligands, to produce polymers that are capped with α,ω-dihydroxy, hydroxyl or ferrocenylpyrazolylethylamino end groups. Complexes 1 and 2 were found to act as catalysts when the [CL]/[C] ratios were varied from 100 to 800 to produce PCL with α,ω-dihydroxy and nearly the same molecular weight. Complexes 3 and 4 on the other hand act as initiators to produce a mixture of PCL that have polymers with ferrocenylpyrazolylethylamino and a hydroxyl as end groups as the major component of the mixture and minor species with α,ω-dihydroxy end group | en_US |
dc.description.sponsorship | National Research Foundation (South Africa) and the University of
Johannesburg | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.subject | (Ferrocenylpyrazolyl)zinc(II) acetate | en_US |
dc.subject | ϵ-caprolactone | en_US |
dc.subject | Ring opening polymerization | en_US |
dc.subject | Catalysts | en_US |
dc.subject | Initiators | en_US |
dc.title | (Ferrocenylpyrazolyl)zinc(II) acetate complexes as initiators and catalysts for the ring opening polymerization of ϵ-caprolacton | en_US |
dc.type | Article | en_US |
dc.contributor.researchID | 10792341 - Jordaan, Johannes Hendrik Lodewikus | |
dc.contributor.researchID | 11333561 - Otto, Daniel Petrus | |