Article citationsMore>>

Tschan, M.J.-T., Guo, J., Raman, S.K., Brulé, E., Roisnel, T., Marie-Noelle Rager, M.N., Legay, R., Durieux, G., Rigaud, B. and Thomas, C.M. (2014) Zinc and Cobalt Complexes Based on Tripodal Ligands: Synthesis, Structure and Reactivity toward Lactide. Dalton Transactions, 43, 4550-4564.
https://doi.org/10.1039/c3dt52629a

has been cited by the following article:

• TITLE: Highly Branched Poly(α-Methylene-γ-Butyrolactone) from Ring-Opening Homopolymerization

  AUTHORS: Pascal Binda, Zakiya Barnes, Dechristian Guthrie, Rasaan Ford

  KEYWORDS: Lanthanide, α-Methylene-γ-Butyrolactone, Polyesters, Ring-Opening Polymerization

  JOURNAL NAME: Open Journal of Polymer Chemistry, Vol.7 No.4, November 30, 2017

  ABSTRACT: New heteroleptic lanthanide complex [L1ILaN{Si(CH3)2}] (1) containing tridentate [ONO] ancillary ligand was synthesized from an acid-base ligand exchange reaction with ligands H2L1 and corresponding homoleptic lanthanide compound La[N{Si(CH3)3}2]3. Meanwhile, dimeric complexes [L1LaCl] (2) and [L1ILaCl] (3) were prepared from salt metathesis reaction between one equivalent of ligands H2LI,II, three equivalent of NaN{Si(CH3)3}2, and one equivalent of LaCl3. These compounds were characterized by nuclear magnetic resonance (300 MHz) and elemental analysis. These complexes were used as catalysts in the ring-opening homopolymerization of α-methylene-γ-butyrolactone. While compound 1 did not show any significant reactivity, compounds 2 and 3 gave significant amount of highly branched poly(α-methylene-γ-butyrolactone) as confirmed by 1H NMR spectroscopy and Malvern’s triple detector GPCMax analysis in DMSO with molecular weights of over 500,000 Dalton. The glass-transition temperatures of the branched polymer samples were determined using a Dynamic Mechanical Analyzer, DMA Q800.