Synthetic Application of Palladium(II) Anchored on a Magnetic Mesoporous Polymelamine-formaldehyde as a Heterogeneous Nanocatalyst withExcellent Regeneracy Performance in Suzuki Coupling Reactions

Development and design of different mesoporous organic polymers (MOPs) as a type of highlycross-linked amorphous polymers can be done by efficient synthetic strategies includinginterlinking of miscellaneous chemical group with porous network that present versatile andattractive properties and applications such as gas storage, separation, catalysts and catalystsupports [1]. Particularly, catalysts based on palladium are widely studied due to their wellknownapplications in the synthesis of organic compounds including Heck, Suzuki, andNegishi coupling reactions [2, 3]. Regeneration of catalyst and designing of a strategy toavoid the risk of gradually decreasing of precious and noble metals is also especially essentialissue in the case of economically perspective. In the present work, we develop palladium(II)anchored on magnetic mesoporous poly melamine-formaldehyde Fe3O4-mPMF/Pd(II) nano-composite as one impressive heterogeneous nanocatalyst with excellent chemical tenability,better durability and desirable porosity. The composite was prepared simply in twosteps. This catalyst was applied for Suzuki reaction to create the corresponding couplingproduct in excellent yields. The influence of reaction time, catalyst amount and temperaturewas investigated and maximum yield of 98% at optimum conditions was obtained. The synthesizednanocatalyst can be easily separated from the reaction medium and reused withoutremarkable changes in its catalytic activity.