Journal
ARABIAN JOURNAL OF CHEMISTRY
Volume 10, Issue 8, Pages 1125-1135Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.arabjc.2016.06.019
Keywords
Calix[4]pyrrole tetrahydrazide; Palladium nanoparticles; Nanocatalyst; Mizoroki-Heck reaction; Recyclability
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Funding
- Department of Science & Technology (DST) - Innovation in Science Pursuit for Inspired Research (INSPIRE), (New Delhi), India
- DRDO (Defence Research and Development Organisation), New Delhi, India
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An approach to synthesize calix[4]pyrrole protected palladium nanoparticles (PdNPs) employed for catalytic Mizoroki-Heck C-C coupling reaction is reported. The nanoparticles are synthesized in water using novel calix[4]pyrrole tetrahydrazide (CPTH) as a reducing as well as stabilizing agent which is a proficient one-pot synthesis discouraging the need of an external stabilizer. CPTH-PdNPs have been characterized and studied by UV-Vis spectroscopy, Fourier transform infrared, transmission electron microscopy, energy-dispersive X-ray and powder X-ray diffraction. The synthesized palladium nanoparticles with a size range of 5-9 nm show an efficient catalytic activity for Heck cross-coupling reactions giving good yields within short reaction time in comparison with conventional palladium catalyst. Also, a good degree of recyclability is shown by the nanocatalyst with five consecutive catalytic cycles. CPTH-PdNPs also exhibit a potential antimicrobial activity against gram-negative bacteria which shows the biological applicability of the synthesized CPTH-PdNPs. (C) 2016 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University.
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