Semnan University Press Applied Chemistry Today 2981-2437 16 59 2021 06 22 Co (II) complex immobilized on functionalized graphene oxide: An efficient catalyst for epoxidation of alkenes Co (II) complex immobilized on functionalized graphene oxide: An efficient catalyst for epoxidation of alkenes 85 98 5252 10.22075/chem.2021.20168.1826 FA Ali Zarnegaryan Department of Chemistry, Yasuj University, Yasuj, Iran Dawood Elhamifar Department of Chemistry, Yasuj University, Yasuj, Iran Journal Article 2020 04 13 In this research, the 1, 2-bis‌(4-pyridylthio)ethane (PTE) functionalized grapheme oxide is used as powerful support for immobilization of cobalt complex to deliver a novel heterogeneous catalyst (Co-PTE-GO) for epoxidation of alkenes. The Co-PTE-GO catalyst was characterized by different techniques such as Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Raman spectroscopy and inductively coupled plasma optical emission spectrometry (ICP-OES). These analyses confirmed high chemical and thermal stability of the designed catalyst. The Co-PTE-GO was used for epoxidation of linear and cyclic alkenes giving corresponding epoxides in high yields (81-97%). This catalyst was recovered and reused at least 4 times with keeping its performance under reaction conditions. In this research, the 1, 2-bis‌(4-pyridylthio)ethane (PTE) functionalized grapheme oxide is used as powerful support for immobilization of cobalt complex to deliver a novel heterogeneous catalyst (Co-PTE-GO) for epoxidation of alkenes. The Co-PTE-GO catalyst was characterized by different techniques such as Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Raman spectroscopy and inductively coupled plasma optical emission spectrometry (ICP-OES). These analyses confirmed high chemical and thermal stability of the designed catalyst. The Co-PTE-GO was used for epoxidation of linear and cyclic alkenes giving corresponding epoxides in high yields (81-97%). This catalyst was recovered and reused at least 4 times with keeping its performance under reaction conditions. https://chemistry.semnan.ac.ir/article_5252_f3e5b9f6b85595fb30499d3af8bb333b.pdf