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    Efficient degradation of environmental contaminants using Pd-RGO nanocomposite as a retrievable catalyst
    (Springer, 2020) Nasrollahzadeh, Mahmoud; Jaleh, Babak; Baran, Talat; Varma, Rajender S.
    Abstract: Pd nanoparticles (NPs)/reduced graphene oxide (RGO) nanocomposite was prepared in a one-pot process by using Euphorbia stenoclada extract as antioxidant media in the absence of any surfactant, dangerous reactants or using external energy input. Catalytic potential of the fabricated Pd-RGO nanocomposite was examined for the degradation of environmental contaminants including Cr(VI), 4-nitrophenol (4-NP), Congo red (CR), methylene blue (MB) and methyl orange (MO). The Pd-RGO nanocomposite has been thoroughly characterized by employing X-ray diffraction, UV–Vis and TEM studies. Furthermore, recyclability and reusability aspects of the nanocomposite were monitored for multiple uses without much change in catalytic activity. Graphic abstract: [Figure not available: see fulltext.].
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    Pd nanoparticles stabilized on the Schiff base-modified boehmite: Catalytic role in Suzuki coupling reaction and reduction of nitroarenes
    (Elsevier, 2019) Yılmaz Baran, Nuray; Baran, Talat; Nasrollahzadeh, Mahmoud; Varma, Rajender S.
    Palladium nanoparticles (Pd NPs) were decorated on Schiff base-modified boehmite (Sch-boehmite) particles via a simple method without deploying any additional reducing agents and their structure was confirmed by different characterization methods. The ensuing Pd NPs@Sch-boehmite was evaluated as a retrievable catalyst for multiple cycles in Suzuki cross-coupling reactions with extensive substrate tolerance to produce biaryls in high yields within 6 min, and the reduction of 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP) at room temperature in 3e4 min, respectively. Moreover, Pd NPs@Sch-boehmite catalyst could be conveniently recovered and reused multiple times.
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    Recent advances in polymer supported palladium complexes as (nano)catalysts for Sonogashira coupling reaction
    (Elsevier, 2020) Nasrollahzadeh, Mahmoud; Motahharifar, Narjes; Ghorbannezhad, Fatemeh; Soheili Bidgoli, Nayyereh Sadat; Baran, Talat; Varma, Rajender S.
    Palladium (Pd) complexes supported on the polymers have been widely used in various organic syntheses endeavors because of their thermal stability, high catalytic activities and recyclability. This article provides contemporary advancements in the deployment of polymer-supported Pd complexes (PSP complexes) in Sonogashira coupling reactions (SCR) of halobenzenes with alkynes. Although most of the reports on SCR are focused on aryl iodides, newer methodologies with supported Pd enable the activation of other aryl halides, especially chlorides, which are discussed in this review.