Supercritical carbondioxide deposition of gamma-Alumina supported Pd nanocatalysts with new precursors and using on Suzuki-Miyaura coupling reactions

Ulusal F., DARENDELI B., ERÜNAL E., EGITMEN A., GÜZEL B.

JOURNAL OF SUPERCRITICAL FLUIDS, cilt.127, ss.111-120, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 127
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.supflu.2017.03.024
  • Dergi Adı: JOURNAL OF SUPERCRITICAL FLUIDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.111-120
  • Anahtar Kelimeler: Vic-dioxime, Precursor, Catalyst, gamma-Alumina, Supercritical deposition, Suzuki Miyaura cross-coupling reaction, TRANSITION-METAL-COMPLEXES, CARBON-DIOXIDE, ARYL CHLORIDES, PALLADIUM NANOPARTICLES, EFFICIENT CATALYST, MIZOROKI-HECK, SOLUBILITY, LIGAND, FLUIDS, INTERFACE
  • Çukurova Üniversitesi Adresli: Evet

Özet

New non-fluorinated precursors (Pd(PTQD)(2) and Pd(DGM)(2)) derived from Pd(II) complexes of dimethylglioxime (DMG) and phenanthrenequinonedioxime (PTQD) were used for supercritical carbondioxide deposition of Pd on gamma-Alumina support. Homogeneous well-dispersed Pd nanoparticles on gamma-Alumina with a size range of 2 nm (for Pd(PTQD)(2)) and 7 nm (for Pd(DGM)(2)) were detected with HR-TEM micrographs. Moreover, XRD analysis showed that the synthesized structures were composed of cubic and octahedral crystals as Pd and PdHX nanoparticles with a high ratio of PdHX. Then, the prepared nanoparticles were used as catalysts for Suzuki-Miyaura reactions of bromobenzene and phenylboronic acid in two different solutions of n-methyl-2-prolydon and dimethylformamide at 60 degrees C. Two bases K2CO3 and Na2CO3 were used to observe their interactions with the catalysts. For all cases, catalysts prepared from Pd(PTQD)(2) showed better performance. This is attributed to the smaller particle size distribution in Pd(PTQD)(2) than Pd(DMG)(2) catalysts.