Zirconium Complexes Bearing Methyl/<i><SUP>t</SUP></i>Butyl Salicylate and Their Catalytic Activity on ε-Caprolactone

Uzun G., Kayan A.

REACTIONS, cilt.5, sa.3, ss.594-606, 2024 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 5 Sayı: 3
  • Basım Tarihi: 2024
  • Doi Numarası: 10.3390/reactions5030029
  • Dergi Adı: REACTIONS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
  • Sayfa Sayıları: ss.594-606
  • Kocaeli Üniversitesi Adresli: Evet

Özet

In this study, methyl/(t)butyl salicylate-bearing zirconium complexes (C1-C8) were prepared by the reaction of zirconium (IV) propoxide/butoxide with salicylic acid, 3-methylsalicylic acid, 4-methylsalicylic acid, and 3,5-di-tert-butylsalicylic acid in alcohols, respectively. All these complexes (C1-C8) were characterized by H-1 NMR, C-13 NMR, FTIR, mass spectroscopy (MS), elemental, and thermogravimetric analyses (TGA). These complexes were utilized as catalysts in the ring-opening polymerization (ROP) of epsilon-caprolactone and were very effective. Polycaprolactone (PCL) was characterized by H-1-NMR, C-13 NMR, and gel permeation chromatography (GPC). In this study, perhaps for the first time, the effects of electron-donating substituents (Me and Bu-t) on epsilon-caprolactone polymerization reactions on salicylate ligands linked to zirconium atoms were investigated.