Synthesis, Characterization and Catalytic Activities of Palladium(II) Nitroaryl Complexes

Mohammad Maududul Huq, Md Robiur Rahman, Masnun Naher, Mohammad Mizanur Rahman Khan, Mostafa Kamal Masud, Golam Mohammad Golzar Hossain, Nianyong Zhu, Yih Hsing Lo, Muhammad Younus, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Two palladium(II) nitroaryl complexes trans-[bromo(p-nitrophenyl)bis(triphenylphosphine)palladium(II)] 1 and trans-[bromo(2,4-dinitrophenyl)bis(triphenylphosphine)palladium(II)] 2 have been synthesized. The complexes were characterized by FTIR and NMR (1H,13C and31P) spectroscopy and elemental analysis. The molecular structure of complex 2, as confirmed by X-ray crystallography, reveals that the Pd atom and its neighboring groups (two PPh3, Br and phenylene group) lie in a slightly distorted square plane. In the UV–Vis spectra of the complexes 1 and 2, the palladium to aryl charge transfer bands were observed. The emission peaks from the singlet excited states (S1 → S0) were observed in the photoluminescence spectra of the complexes. The thermal stability of the complexes has been studied by thermal gravimetric analysis (TGA). TGA data showed that both complexes are thermally stable up to 200 °C, and complex 1 is more stable than 2. The catalytic efficiency of the new palladium(II) complexes was studied as demonstrated using the Sonogashira coupling reactions with good yields. The experimental results suggest that the Sonogashira coupling reactions can be performed at moderate temperature (50 °C) using these new palladium(II) complexes as catalysts.
Original languageEnglish
Pages (from-to)1243-1252
Number of pages10
JournalJournal of Inorganic and Organometallic Polymers and Materials
Volume26
Issue number6
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Keywords

  • Catalysis
  • Crystal structure
  • Palladium
  • Photoluminescence
  • Sonogashira coupling

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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