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Mohamed Mokhtar, Speaker at Speaker for Catalysis Conference- Mohamed Mokhtar
King Abdulaziz University, Saudi Arabia
Title : Novel efficient Pd-free catalyst for Suzuki C-C coupling reaction: Green protocol

Abstract:

Suzuki cross-coupling reaction has developed one of the furthermost effectual approaches for the synthesis of biaryls or substituted aromatic moieties from aryl halides and arylboronic acids with a palladium-catalyst in the past two era’s. Herein, Pd-free layered double hydroxide containing nickel catalysts were prepared by co-precipitation method under ultrasonic irradiation and N2 atmosphere with different molar ratios of Ni: Mg: Al and coded as (1NiLDHs-Dr), (1.5NiLDHs-Dr) and (2NiLDHs-Dr). A series of reduced catalysts under 5%H2/N2 at different temperatures were coded as 1NiLDHs-R200, 1.5NiLDHs-R200 and 2NiLDHs-R200. As-synthesized 2NiLDHs-Dr was the superlative catalyst when coupling different aryl halides with different boronic acids derivatives. Deep investigation of all catalysts was done using different techniques such as inductively coupled plasma optical emission spectroscopy (ICP-OES), x-ray photoelectron spectroscopy (XPS), powder x-ray diffraction (XRD), thermogravimetric analyses (TGA), Fourier transfer infrared (FTIR), scanning electron microscope (SEM) connected with energy dispersive x-ray (EDX) and N2-physisorption at -196 oC.  The results attained verified that ?-Ni(OH)2 was fashioned for 2NiLDHs-Dr catalyst and the enclosure of nickel ions in the cationic sheet of layered structure were responsible for the fascinating catalytic efficacy rather than the basic nature of material. The Ni-containing LDHs catalysts encourage forthcoming studies in Pd-free catalyzed C-C coupling reactions.

Biography:

His dual roles as Professor of Physical Chemistry, Surface Chemistry and Catalysis Lab in the Physical Chemistry Department of the National Research Centre (NRC) in Egypt, as well as my “delegation”, since 2004, to King Abdul-Aziz University (KAU) in Saudi Arabia, are just the latest in a string of leadership roles he has held in the academic and scientific research field for almost 30 years. His research interests in advanced materials, nanomaterials with special interest in their application in heterogeneous catalysis. Solid acids and solid bases for liquid phase and gas phase reactions. In addition, he is specialist in catalyst and adsorbent characterization with particular expertise in adsorption measurements. He has also served as journal reviewer for over 100 articles, as a member of journals’ editorial boards, and in academic and industrial collaboration on projects in various parts of the world. His scientific and research career includes contributions and participation in over 30 workshops and conferences, close to 100 publications and 10 patents registered in Japan and the USA and distinctions from numerous professional and major global bodies. He was cited in Marquis Who’s Who in Science in 2013 and was awarded an outstanding research award in 2011-2017 from the deanship of scientific research at KAU. 

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