Hydrothermal synthesis of a novel mu-dihydroxo-bis(2,6-pyridinedicarboxylatoaquachromium(III)) complex and investigation of its catalytic activity

AY B., YILDIZ E., Jones S., Zubieta J.

INORGANICA CHIMICA ACTA, cilt.387, ss.15-19, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 387
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.ica.2011.12.043
  • Dergi Adı: INORGANICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.15-19
  • Anahtar Kelimeler: Cr(III) complex, 2,6-Pydc, Hydrothermal synthesis, Heterogeneous catalysis, Crystal structure, Thymoquinone, ORGANIC FRAMEWORK STRUCTURES, CRYSTAL-STRUCTURES, COORDINATION POLYMER, PYRIDINE-3,4-DICARBOXYLIC ACID, PYRIDINE-2,6-DICARBOXYLIC ACID, THYMOQUINONE, OXIDATION, NI(II), MONOTERPENES, COMPOUND
  • Çukurova Üniversitesi Adresli: Evet

Özet

A new chromium(III) compound [Cr(H2O)(OH)(C7H3NO4)](2), mu-dihydroxo-bis(2,6-pyridinedicarboxylato aquachromium(III)), has been successfully synthesized by the hydrothermal reaction of 2,6-pyridinedicarboxylic acid (H(2)pydc) and CrCl3 center dot 6H(2)O in the alkali medium. This metal complex was characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. The X-ray analysis showed that the structure is molecular and consists of units of two Cr(H2O)(OH)(C7H3NO4) groups linked through two OH groups. In the complex, each Cr centre is in a distorted octahedral environment, defined by two hydroxyl bridges, an aqua ligand and a tridentate pyridinedicarboxylate anion. The thermal stability and catalytic properties of the complex were also investigated. The complex affected the oxidation of thymol to thymoquinone with 100% selectivity and a conversion rate of 20.25%. (C) 2011 Elsevier B. V. All rights reserved.