Synergistic Effect of NiLDH@YZ Hybrid and Mechanochemical Agitation on Glaser Homocoupling Reaction

• Published in: Chemistry : a European journal Vol. 27; no. 34; pp. 8875 - 8885
• Main Authors: Mokhtar, Mohamed, Alzhrani, Ghalia, Aazam, Elham S., Saleh, Tamer S., Al‐Faifi, Sulaiman, Panja, Subir, Maiti, Debabrata
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 16.06.2021
• Subjects: acid-base bifunctional catalyst; Acidity; Agitation; Ammonia; ball milling; Basicity; Carbon dioxide; Catalysis; Catalysts; Catalytic activity; Chemistry; Glaser reaction; Hybrids; Nickel; NiLDH@Y-zeolite hybrid catalyst; Porosity; Synergistic effect; synergistic effects; Glaser reaction; acid-base bifunctional catalyst; ball milling; synergistic effects; NiLDH@Y-zeolite hybrid catalyst
• ISSN: 0947-6539; 1521-3765; 1521-3765
• DOI: 10.1002/chem.202100018

Herein, we report the synthesis of nickel‐layered double hydroxide amalgamated Y‐zeolite (NiLDH@YZ) hybrids and the evaluation of the synergistic effect of various NiLDH@YZ catalysts and mechanochemical agitation on Glaser homocoupling reactions. Nitrogen adsorption‐desorption experiments were carried out to estimate the surface area and porosity of NiLDH@YZ hybrids. The basicity and acidity of these hybrids were determined by CO2‐TPD and NH3‐TPD experiments respectively and this portrayed good acid‐base bifunctional feature of the catalysts. The NiLDH@YZ‐catalyzed mechanochemical Glaser coupling reaction achieved best yield of 83 % for the 0.5NiLDH@0.5YZ hybrid after 60 min of agitation, which revealed the highest acid‐base bifunctional feature compared to all the investigated catalysts. The developed catalyst has proven itself as a robust and effective candidate that can successfully be employed up to four catalytic cycles without significant loss in catalytic activity, under optimized reaction conditions. This work demonstrated a new strategy for C−C bond formation enabled by the synergy between mechanochemistry and heterogeneous catalysis. In the present study, NiLDH, YZ and amalgamated NiLDH@YZ catalysts were tested for the Glaser homocoupling reaction. The catalyst 0.5NiLDH@0.5YZ showed superior catalytic efficiency under mechanochemical agitation. This robust catalyst used for four times provides a new strategy in C−C coupling reactions by using mechanochemistry.