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      Hibiscus Rosasinensis L. aqueous extract-assisted valorization of lignin: Preparation of magnetically reusable Pd NPs@Fe3O4-lignin for Cr(VI) reduction and Suzuki-Miyaura reaction in eco-friendly media.

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          Abstract

          Hibiscus Rosasinensis L. extract mediated biosynthesis of Pd nanoparticles (NPs) and their deposition on the magnetic calcium lignosulfonate (MCaLig), as a simple and eco-friendly process for the preparation of Pd NPs@Fe3O4-lignin, is reported. The Pd NPs@Fe3O4-lignin was characterized by TEM, XRD, EDS, FE-SEM, FT-IR, VSM, and UV-Vis. The magnetic NPs were employed as exceptional catalysts in the catalytic reduction of Cr(VI) and Suzuki-Miyaura reaction between PhB(OH)2 and substituted aryl halides in EtOH:H2O as well as under ligand free conditions in the presence of K2CO3 with satisfactory product yields. Regeneration of the Pd NPs@Fe3O4-lignin was carried out by a magnet after the preparation of biphenyls. Catalytic efficiency retention was achieved after seven cycles.

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          Author and article information

          Journal
          Int. J. Biol. Macromol.
          International journal of biological macromolecules
          Elsevier BV
          1879-0003
          0141-8130
          Apr 01 2020
          : 148
          Affiliations
          [1 ] Department of Chemistry, Faculty of Science, University of Qom, 3716146611, Qom, Iran. Electronic address: mahmoudnasr81@gmail.com.
          [2 ] Department of Chemistry, Faculty of Science, University of Qom, 3716146611, Qom, Iran.
          [3 ] Aksaray University, Faculty of Science and Letters, Department of Chemistry, 68100 Aksaray, Turkey.
          [4 ] Departamento de Quimica Organica, Universidad de Cordoba, Campus de Rabanales, Ctra Nnal IV-A, Km 396, E14014 Cordoba, Spain; Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., 117198 Moscow, Russia. Electronic address: rafael.luque@uco.es.
          Article
          S0141-8130(19)37383-0
          10.1016/j.ijbiomac.2020.01.107
          31935407
          17babe63-d05f-4f8b-b414-9a09d85a4a92
          History

          Suzuki-Miyaura,Hibiscus Rosasinensis L.,Pd NPs@Fe(3)O(4)-lignin,Biowaste,Cr(VI) reduction

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