Synthesis and characterization of the novel diamine‐functionalized Fe₃O₄@SiO₂ nanocatalyst and its application for one‐pot three‐component synthesis of chromenes

Abstract

Fe 3 O 4 @SiO 2 @propyltriethoxysilane@o-phenylendiamine as an environmentallybenign functionalized silica-coated magnetic organometallic nanomaterial has been synthesized and characterized by Fourier transforms infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) images and energy dispersive X-ray (EDX) and vibrating sample magnetometer (VSM) analyses. Then, its catalytic activity was investigated for the one-pot three-component condensation reaction between dimedone, malononitrile and various substituted aromatic aldehydes to afford the corresponding 2-amino-4H-chromene derivatives under mild reaction conditions. This nanocatalyst can be easily recovered from the reaction mixture by using a magnet and reused for at least five times without significant decrease in catalytic activity.

Green synthesis of silver nanoparticles using Eucalyptus comadulensis leaves extract and its immobilization on magnetic nanocomposite (GO‐Fe3O4/PAA/Ag) as a recoverable catalyst for degradation of organic dyes in water

“…Separation of nanoparticles from the reaction medium using simple methods such as filtration and centrifugation is difficult . To overcome these difficulties, different solid supports such as TiO 2 , graphene, mesoporous materials, and Fe 3 O 4 were applied for the immobilization of metal nanoparticles and the construction of the heterogeneous nanocatalyst . Graphene oxide (GO) has been identified as a new group of interesting catalysts because of their unique properties such as good stability, large surface area, high mechanical strength, and good adsorption capacity.…”

Synthesis and crystal structure of a new copper (II) complex, designed to produce efficient successor of Cu2O, toward synergy of adsorption and photodegradation of MB

“…They concluded that the particle size and morphology of nanostructure complex depended on temperature, power ultrasound and reaction time. Magnetic composites nanostructure is particularly attractive owing to their potential applications in catalysis due to their high catalytic performance as well as their easy separation and recycling 22–31 . Among various techniques for the synthesis of transition metal oxide nanoparticles such as impregnation, 32 co‐precipitation, 33 microwave heating, 34 and etc., thermal decomposition of inorganic complexes is one of the most common methods.…”

Preparation and Characterization of CuFe2O4 Nanoparticles by the Sol-Gel Method and Investigation of Its Microwave Absorption Properties at Ku-Band Frequency Using Silicone Rubber

“…CuFe2O4 nanoparticles have attracted substantial attention because of their various applications in photocatalysts, sensors, water treatment catalysts, and air purification systems [1,2]. Microemulsion, thermal decomposition, aerosol, co-precipitation, mechanochemical, and hydrothermal methods have been used to synthesize spinel nanoparticles [3][4][5][6][7]. In the last decade, the microwave absorption capability of materials has been widely investigated due to various applications of microwave absorbing materials in the electric industries.…”