Reusable α-MoO3 nanobelts catalyzes the green and heterogeneous condensation of 1,2-diamines with carbonyl compounds

Abstract

Crystalline nanobelts of a-MoO 3 have been obtained successfully using novel and safe agents through a simple and safe sol-gel method (polymerizing-complexing) and characterized by XRD, FT-IR, Raman spectroscopies, high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and the temperature programmed desorption (TPD) of ammonia. An orthorhombic lattice system for nano-MoO 3 was established. The HRTEM images showed that the nanobelt morphology of a-MoO 3 mostly ranged from 20-70 nm in width and 200-400 nm in length. The ammonia TPD profile demonstrated strong acidic sites. The spectral and analysis data confirmed the effectiveness of the method for the preparation of a-MoO 3 nanobelts by prevention of grain growth or agglomeration of the particles. The nanostructured MoO 3 exhibited a high efficiency in catalyzing the condensation reaction of various 1,2-diamine and carbonyl compounds for synthesis of heterocyclic compounds. The recovery of the title heterogenous nanocatalyst was easy and efficient and its catalytic activity was strikingly different from the bulk material.

Supramolecular photocatalyst of Palladium (II) Encapsulated within Dendrimer on TiO2 nanoparticles for Photo‐induced Suzuki‐Miyaura and Sonogashira Cross‐Coupling reactions

“…Using Pd (II) [PTATA G1‐NH 2 ] @TiO 2 nanodendritic as photocatalyst led to a conversion of 80%, indicating that growing of dendritic branches in nanodendritic catalysts effect on photocatalytic activity. So, considering the results presented in Figure S7, the catalytic performance of by Pd (II) [PTATA G2‐NH 2 ] @ TiO 2 nanodendritic catalyst can be explained with respect to catalytic C‐C coupling activity of Pd (II) centers combined with photocatalytic activity of TiO 2 core which acts as support and the number of dendritic branches.…”

A nanoscopic icosahedral {Mo72Fe30} cluster catalyzes the aerobic synthesis of benzimidazoles

“…To show the merit of title methodology for the synthesis of 2aryl-1H-benzimidazole derivatives, the reaction conditions and the catalytic performance of a number of catalysts in literature, are summarized in Table 4 in comparison with this work. [35][36][37][38][39][40][41][42][43][44][45][46] Most of the catalysts given in Table 4, suffer seriously from toxicity and high catalyst dose. Additionally, they require toxic solvents and tedious work-up procedures or long reaction times.…”

Additive- and Oxidant-Free Expedient Synthesis of Benzimidazoles Catalyzed by Cobalt Nanocomposites on N-Doped Carbon

“…2-Phenyl-1H-benzimidazole (3a) [1] , White solid; 1 2-(4-chlorophenyl)-1H-benzimidazole (3b) [1] , White solid; 1 4-(1H-benzimidazol-2-yl)benzonitrile (3c) [2] , White solid; 1 3-(1H-benzimidazol-2-yl)benzonitrile (3d) [3] , White solid; 1 2-(4-nitrophenyl)-1H-benzimidazole (3e) [1] , Yellow solid; 1 [2] , Yellow solid; 1 [4] , Yellow solid; 1 2-(o-tolyl)-1H-benzimidazole (3h) [4] , White solid; 1 2-(4-methoxyphenyl)-1H-benzimidazole (3i) [4] , White solid; 1 2-benzyl-1H-benzimidazole (3j) [4] , Yellow solid; 1 2-styryl-1H-benzimidazole (3k) [5] , Brown solid; 1…”