Immobilization of Lewis acidic ionic liquid on perlite nanoparticle surfaces as a highly efficient solid acid catalyst for the solvent-free synthesis of xanthene derivatives

Moradi, Leila; Mirzaei, Mehdi

doi:10.1039/c9ra03312b

Cited by 28 publications

(9 citation statements)

References 56 publications

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“…The important bonds are Fe-O-Si (800 cm −1 ), Si-O-Si (1080 cm −1 ), C-H stretching vibrations of the imidazolium ring (3080, 3147 cm −1 ),Si-OH(3429 cm −1 ),CH 3 ,CH 2 stretchingvibrations (2922 cm −1 , 2852 cm −1 ), respectively, and CH 3 , CH 2 bending vibrations (1463 cm −1 , 1396 cm −1 ). The results provided that ILsweresuccessfullyattachedtothesurfaceofMNPscoatedwith a silica shell [36].…”

Section: Preparation Polyurethane Rigid Foam Nanocompositesmentioning

confidence: 94%

“…The product was washed with distilled water and neutralized with sodium hydroxide, then washed again with distilled water and filtered by filter paper under vacuum, then dried in oven at 100 °C for 2 hours, and calcinated at 700 °C for 1 hour. 1 g of perlite nanoparticles (PNPs) was added to 100 ml, 50% of TBAB in a stirred-refluxed flask at 80 °C for 24 hours, the product filtered, and dried vacuum oven at 100 °C (Figure 3) [36].…”

Section: Preparation Of Modified Perlite Nanoparticles (M-pnps)mentioning

confidence: 99%

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Preparation and Characterization of Polyurethane Rigid Foam Nanocomposites from Used Cooking Oil and Perlite

Sarim

Nikje

Dargahi

2023

International Journal of Polymer Science

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Modern chemical industries trend towards industrial ecology to achieve a circular economy, because of increasing environmental and economic awareness jointly. One of the most important of these industries is polyurethane, accompanied by more and more interest in using renewable polyols. The study focuses on synthesizing and characterizing polyurethane rigid foams formulated by replacing 40%, 60%, and 100% of a petrochemical polyol with a bio-polyol derived from used cooking oil, and introducing perlite and modified perlite nanoparticles into the bio-polyol. The products were evidenced by transmission electron microscopy (TEM), Fourier transform infrared (FTIR), nuclear magnetic resonance spectral analyses, thermogravimetric analysis (TGA), and scanning electron microscopy equipped with energy-dispersive spectroscopy. The results indicate that the hydroxide value and viscosity at 25°C of the bio-polyol were around 456 ± 30 mg KOH/g and 148 mPa s. Bio-polyol blends of 40% and 60% had no significant effect on the thermal properties of polyurethane systems. The lowest value of char yield was observed for the sample with a 100% bio-polyol content of 2.3%. The beneficial effects of both perlite and modified perlite particles on the 100% bio-polyol-based foam were observed as having an effective role in improving thermal stability and reconstructing cellular structure. The yield char increased to 13.2%, 14%, 14.7%, and 15% for the two filler contents 2.5% and 5%. However, the new bio-polyol has a fairly good value in industrial construction, and the perlite particles have enhanced and improved this value.

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Section: Preparation Polyurethane Rigid Foam Nanocompositesmentioning

confidence: 94%

Section: Preparation Of Modified Perlite Nanoparticles (M-pnps)mentioning

confidence: 99%

Preparation and Characterization of Polyurethane Rigid Foam Nanocomposites from Used Cooking Oil and Perlite

Sarim

Nikje

Dargahi

2023

International Journal of Polymer Science

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“…Moradi et al employed perlite nanoparticles modified with Lewis acidic ionic liquid (perlite NP@IL/ZrCl 4 ) as heterogeneous nanocatalyst for the one-pot synthesis of xanthene derivatives. [66] Perlite, an volcanic glass containing silica (70-75%), alumina (12-15%), and traces of oxides of sodium, potassium, iron, magnesium and calcium. As shown in scheme 96, ionic liquid Si(pmim)Cl 214 was prepared and attached to already synthesized perlite nanoparticle surfaces 215.…”

Section: Pt-au On Dmsi-al 2 O 3 Facilited Selective Hydrogenation Of mentioning

confidence: 99%

Synthetic Organic Transformations of Transition‐Metal Nanoparticles as Propitious Catalysts: A Review

Ganesh

Ramakrishna

2020

Asian J Org Chem

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Nanotechnology has produced compelling evidences in the field of catalysis, construction, electronics, energy, food, imaging, medical, packaging, pharmaceutical sectors and in water treatment. Nanoparticles of transition metal origin are enticing in catalytic applications due to their lowlying empty orbitals for bonding and can offer a distinct ability to expand the coordination sphere. This coupled with ease of synthesis, recyclability and occurrence in abundance staples them as unique industrial materials. Transition metals such as Gold, Palladium, Silver, Copper, Iron, Ruthenium, Rhodium and hetero-bimetallic versions have been in demand for various organic transformations. The sharp rise in number of literature reports justifies the stand in catalytic property. A unique ability to form Covalent and/or Van der Waals interactions with solid supports and activate the substrates through close functional group interactions renders them as effective entities in organic transformations. In this review, we present the new developments in this niche in the past five years with a retreat on the mechanistic aspects along with parameters involved in nanoparticle characterizations through advances in spectroscopy.

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“…Condensation of aldehydes, β-naphthol, and cyclic 1,3-dicarbonyl compounds is the simplest method for the synthesis of tetrahydrobenzoxanthene-11-ones. So far, many catalysts were used for synthesizing various xanthene derivatives such as nanocatalysts, [26][27][28][29][30][31] acid catalysts, [32,33] ionic liquids, [34,35] organocatalysts, [36,37] polymeric catalysts, [38] and natural catalysts. [39] However, such types of catalysts possessed some disadvantages like prolonged reaction time, toxic organic solvents, metal-based catalysts, sluggish reaction and low product yield, harsh reaction conditions, use of the excess quantity of catalysts, and difficult recovery and reusability of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Novel Carboxylic Acid Functionalized Dendronized Polymer: A Homogeneous, Reusable Metal Free Acid Catalyst for the Synthesis of Symmetric and Unsymmetric Xanthene Derivatives

et al. 2021

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In the present study, carboxylic acid‐functionalized tris(hydroxymethyl)propane initiated polyepichlorohydrin cored dendronized polymer (TMP‐PECH‐COOH) was successfully synthesized. Successful incorporation of carboxylic acid functionality was evidenced by Fourier transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TG/DTG), and NMR spectroscopy (1H NMR). Thermodynamic properties such as thermal energy, enthalpy, and Gibb's free energy as well as global reactivity descriptors such as chemical potential, chemical hardness, and electrophilicity index of the TMP‐PECH‐COOH dendronized polymer were investigated using Gaussian 09 program employing the hybrid density functional B3LYP method and 6‐31G basis set. The synthesized dendronized polymer (TMP‐PECH‐COOH) could act as a metal‐free acid catalyst for catalyzing the reactions for the synthesis of 1,8‐dioxooctahydroxanthenes and tetrahydrobenzoxanthene‐11‐ones under mild reaction conditions in an aqueous medium. The catalyst could be reused at least six times making the present procedure facile, practical, and sustainable. In addition, the efficiency of the present catalyst was compared with some previous reports.

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Immobilization of Lewis acidic ionic liquid on perlite nanoparticle surfaces as a highly efficient solid acid catalyst for the solvent-free synthesis of xanthene derivatives

Abstract: Perlite nanoparticles were prepared, modified with Lewis acidic ionic liquid, and used as a highly efficient catalyst for the eco-friendly, solvent free and high yield synthesis of xanthenes via a multicomponent reaction.

Cited by 28 publications

References 56 publications

Preparation and Characterization of Polyurethane Rigid Foam Nanocomposites from Used Cooking Oil and Perlite

Preparation and Characterization of Polyurethane Rigid Foam Nanocomposites from Used Cooking Oil and Perlite

Synthetic Organic Transformations of Transition‐Metal Nanoparticles as Propitious Catalysts: A Review

Novel Carboxylic Acid Functionalized Dendronized Polymer: A Homogeneous, Reusable Metal Free Acid Catalyst for the Synthesis of Symmetric and Unsymmetric Xanthene Derivatives

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