A supramolecular peptide nanofiber templated Pd nanocatalyst for efficient Suzuki coupling reactions under aqueous conditions

Abstract

A bioinspired peptide amphiphile nanofiber template for formation of one-dimensional Pd nanostructures is demonstrated. The Pd and peptide nanocatalyst system enabled efficient catalytic activity in Suzuki coupling reactions in water at room temperature. The nanocatalyst system can be easily separated and reused in successive reactions without significant loss in activity and structural integrity.

Ultrasmall Pd nanoclusters: facile synthesis and versatile catalytic application

“…To date, many attempts have been made to develop novel Pd-based nanomaterials with higher catalytic activity. These include cross coupling [4,[6][7][8][9], hydrogenation of nitroarene [10,11] and other unsaturated groups [12], Ullmann-type homocoupling of haloarenes [13], hydrodehalogenation of aryl halides [14] and removal of volatile organic compounds (VOCs) [15][16][17]. It was reported that heterogeneous Pd or Pt nanoparticles are available, respectively, for nitrobenzene reduction or C-C coupling [18][19][20][21].…”

“…3.4.1 Hydrazobenzene 1 H NMR (400 MHz, [D 1 ] CDCl 3 , TMS):  7.20 (m, 4H, CH),6.82 (m, 6H, CH), 5.54 ppm (s, 2H, NH),13 C NMR (100 MHz, [D 1 ] CDCl 3 , TMS): =148.91, 129.40, 119.93, 112.39 ppm. H NMR (400 MHz, [D 1 ] CDCl 3 , TMS ):=7.92 (d, 3 J(H,H) =7.83, 2H, CH), 7.50 ppm (m, 3H, CH); 13 C NMR (100 MHz, [D 1 ] CDCl 3 , TMS): =152.69, 131.00, 129.10, 122.86 ppm.…”

Concurrent zero-dimensional and one-dimensional biomineralization of gold from a solution of Au3+and bovine serum albumin

“…At the crystal packing scale, a consensus is beginning to emerge about the sequence requirements needed for NP synthesis [2, 17–25]. When examining the reactions that must occur, the following are basic to the formation of metal NPs: (i) the reagents most often include a charged metal salt; (ii) the metal ion must be reduced to its elemental form; (iii) the metal atom needs to interact with a ligand in order to keep it suspended within the reaction solvent; and (iv) the ligands must organize the structure of the growing metal colloid.…”

Size-controlled conformal nanofabrication of biotemplated three-dimensional TiO2 and ZnO nanonetworks

“…Superior control over the size, shape, and uniformity of the materials constitute the principal parameters within the context of nanofabrication. Materials in different size and architectures, such as, zero-dimensional nanoparticles; one-dimensional nanowires, nanotubes; two-dimensional nanosheets; and three-dimensional mesoporous structures, and nanonetworks have been fabricated and their properties in desired applications have been closely investigated2345678910. Among these, nanonetwork architecture, which can be defined as isotropically distributed, three-dimensional interconnected nanowires, draws particular attention for its high surface area and porosity, which allow robust interaction with the solvent and solute molecules.…”

“…As opposed to hard (inorganic) templates, soft (organic) templates are particularly attractive due to relative ease of modification over the chemical functionality, architecture diversity, and physical properties of the template59. However, low chemical stability at high temperature, liability to organic solvents, and fast chemical degradation remain as the major challenges with organic templates16.…”