Nickel Nanoparticles Immobilized on a Porous Triazine-Thiourea-Sulfonamide as an Efficient Heterogeneous Catalyst for Reduction of Carbonyl Compounds

Abstract

In order to investigate the role of silica template, polymers and nickel nanoparticles on the reduction of aldehydes/ketones, a novel porous triazine-thiourea-sulfonamide polymeric organic support (TTSA) was prepared via in-situ polymerization of melamine (1,3,5-triazine-2,4,6-triamine), thiourea and benzene-1,3-disulfonyl chloride in the presence of silica nanoparticles as a template led to the synthesize silica TTSA nanocomposite. Next, after removal of the template, the nanocomposite was transformed into mesoporous poly triazine-thiourea-sulfonamide. Ni nanoparticles (Ni NPs) were then decorated on the designed mesoporous polymer support and the resulting TTSA@Ni NPs nanospheres were employed as heterogeneous catalyst in the construction of alchohols from reduction of aldehydes/ketones using formic acid/triethyl amine as a reducing agent in water as solvent. The catalyst is low-cost, non-toxic, and can be reused for several catalytic cycles without decreasing the activity.

Catalytic application of a novel melamine–naphthalene-1,3-disulfonic acid metal–organic framework in the synthesis of β-acetamido ketones

“…Herein, regarding the interesting properties of Zr-based MOFs and pursuing our interest in porous substances as catalysts in MCRs, [76][77][78][79][80][81][82][83][84][85] we aimed to design and prepare a stable multifunctional Zr-MOF (UiO-66-Mel-NHC 10 H 5 (SO 3 H) 2 ) consisting of a melamine-sulfonic acid covalently bonded to the UiO-66-NH 2 (Scheme 1). The obtained MOF was prepared through PSM of the UiO-66-NH 2 in the following two steps: (I) covalent hybridization of cyanuric chloride and (II) functionalization with 7-aminonaphthalene-1,3-disulfonic acid.…”