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Open AccessArticle

One-Pot Aqueous and Template-Free Synthesis of Mesoporous Polymeric Resins

Department of Chemical Engineering, Rowan University, Glassboro, NJ 08028, USA
Department of Chemistry, University of Connecticut, Storrs, CT 06268, USA
National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou University, Gongye Street 523, Fuzhou 350002, China
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(9), 782;
Received: 14 August 2019 / Revised: 2 September 2019 / Accepted: 10 September 2019 / Published: 19 September 2019
(This article belongs to the Section Catalytic Materials)
This work explores the novel one-pot aqueous phase synthesis of mesoporous phenolic-hyperbranched polyethyleneimine resins without the use of a template, and their utility as heterogeneous catalysts in batch reactors and continuous microreactors. Catalyst surface areas of up to 432 m2/g were achieved with a uniform Pd distribution and an interconnected, highly porous, network structure, confirmed through Brunauer–Emmett–Teller (BET) surface area measurements, scanning electron microscopes (SEM), X-Ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM), and Energy-dispersive X-ray spectroscopy (EDS). The heterogeneous catalysts achieved a maximum 98.98 ± 1% conversion in batch Suzuki couplings, with conversions being dependent upon reaction conditions, reactant chemistries, Pd loading and catalyst surface area. The catalysts were shown to be recyclable with only a marginal loss in conversion achieved after five runs. Up to 62 ± 5% and 46.5 ± 8% conversions at 0.2 mL/s and 0.4 mL/s flow rates, respectively, were achieved in a continuous microreactor. Understanding the mechanism of action of this mesoporous resin is a future research area, which could help expand the application vistas for this catalyst platform. View Full-Text
Keywords: mesoporous polymers; heterogeneous catalysis; cross-coupling; microreactor mesoporous polymers; heterogeneous catalysis; cross-coupling; microreactor
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Nabavinia, M.; Kanjilal, B.; Hesketh, A.; Wall, P.; Shirazi Amin, A.; Kerns, P.; Stanzione, J.F., III; Suib, S.; Liu, F.; Noshadi, I. One-Pot Aqueous and Template-Free Synthesis of Mesoporous Polymeric Resins. Catalysts 2019, 9, 782.

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