Showing papers on "Acetonitrile published in 2018"
TL;DR: In this article, the authors elucidate the mechanism of formation of crystalline Li7P3S11 synthesized in the liquid phase [acetonitrile (ACN)].
Abstract: Crystalline Li7P3S11 is a promising solid electrolyte for all solid-state lithium/lithium ion batteries. A controllable liquid phase synthesis of Li7P3S11 is more desirable than conventional mechanochemical synthesis, but recent attempts suffer from reduced ionic conductivities. Here we elucidate the mechanism of formation of crystalline Li7P3S11 synthesized in the liquid phase [acetonitrile (ACN)]. We conclude that crystalline Li7P3S11 forms through a two-step reaction: (1) formation of solid Li3PS4·ACN and amorphous “Li2S·P2S5” phases in the liquid phase and (2) solid-state conversion of the two phases. The implication of this two-step reaction mechanism for morphology control and the transport properties of liquid phase synthesized Li7P3S11 is identified and discussed.
120 citations
TL;DR: In this article, a ligand-free perovskite nanocrystals of Cs4PbBr6, which retained high photoluminescence quantum yield (44%), were prepared using a polar solvent (acetonitrile) and two small molecules (ammonium acetate and cesium chloride).
Abstract: Although ligands of long carbon chains are very crucial to form stable colloidal perovskite nanocrystals (NCs), they create a severe barrier for efficient charge injection or extraction in quantum-dot-based optoelectronics, such as light emitting diode or solar cell. Here, we report a new approach to preparing ligand-free perovskite NCs of Cs4PbBr6, which retained high photoluminescence quantum yield (44%). Such an approach involves a polar solvent (acetonitrile) and two small molecules (ammonium acetate and cesium chloride), which replace the organic ligand and still protect the nanocrystals from dissolution. The successful removal of hydrophobic long ligands was evidenced by Fourier transform infrared spectroscopy, ζ potential analysis, and thermogravimetric analysis. Unlike conventional perovskite NCs that are extremely susceptible to polar solvents, the ligand-free Cs4PbBr6 NCs show robust resistance to polar solvents. Our ligand-free procedure opens many possibilities not only from a material hybridi...
58 citations
TL;DR: The recyclability test indicates that 1' is a promising probe for the long-term detection of 4-NP and Fe3+ ions.
Abstract: A Zr(IV) based luminescent metal–organic framework (MOF; 1) was synthesized by a solvothermal method using a mixture of ZrCl4, quinoline-2,6-dicarboxylic acid (H2QDA) ligand and trifluoroacetic acid (modulator) having a 1 : 1 : 10 molar ratio in N,N-dimethylformamide (DMF). For activation, the methanol-exchanged sample was heated under high vacuum at 120 °C for 1 day. Different techniques like X-ray powder diffraction (XRPD), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy and energy dispersive X-ray (EDX) analysis were applied to fully characterize 1. The activated form of 1 (called 1′) has the formula [Zr6O6(OH)2(CF3COO)2(C11H5NO4)4(H2O)4]. It exhibited quick response and great selectivity for the fluorimetric sensing of 4-nitrophenol (4-NP) in acetonitrile and Fe3+ ions in water. The probe maintained its high selectivity for 4-NP and Fe3+ ions even in the presence of potentially intrusive nitroaromatics and metal ions, respectively. The detection limits for 4-NP and Fe3+ were found to be 1.40 ppt and 0.71 ppb, respectively. These values are the lowest among the existing MOF probes for Fe3+ and 4-NP. The electron and energy transfer processes along with the electrostatic interactions of 4-NP with the MOF can be the possible reasons for the selectivity for 4-NP. The fluorescence resonance energy transfer (FRET) process can be the major reason behind the quenching mechanism for Fe3+ ions. The recyclability test indicates that 1′ is a promising probe for the long-term detection of 4-NP and Fe3+ ions.
53 citations
TL;DR: The results lead to the proposal of a model where the hydroxyphenyl group behaves as a local proton source, a hydrogen bond donor to CO2-bound intermediates, and a hydrogen bonding partner to Brønsted acids.
Abstract: Rapid and efficient electrochemical CO2 reduction is an ongoing challenge for the production of sustainable fuels and chemicals In this work, electrochemical CO2 reduction is investigated using metalloporphyrin catalysts (metal = Mn, Fe, Co, Ni, Cu) that feature one hydroxyphenyl group, and three other phenyl groups, in the porphyrin heterocycle (5-(2-hydroxyphenyl)-10,15,20-triphenylporphyrin, TPOH) These complexes, which are minimal versions of related complexes bearing up to eight proton relays, were designed to allow more straightforward determination of the role of the 2-hydroxylphenyl functional group The iron-substituted version of TPOH supports robust reduction of CO2 in acetonitrile solvent, where carbon monoxide is the only detected product Addition of weak Bronsted acids (1 M water or 8 mM phenol) gives rise to almost 100-fold enhancement in turnover frequency Surprisingly, the iron analogue is a poor catalyst when the solvent is changed to dimethylformamide These results lead to the prop
53 citations
TL;DR: In this paper, two chromofluorescent coumarin-functionalized salicylidene based probes (3a and 3b) have been synthesized and evaluated for selective detection of fluoride and cyanide ions.
Abstract: Two chromofluorescent coumarin-functionalized salicylidene based probes (3a and 3b) have been synthesized and evaluated for selective detection of fluoride and cyanide ions. Probes 3a and 3b selectively detect fluoride ions in acetonitrile medium via H-bond interaction and subsequent deprotonation to elicit a distinct visual colour change from colourless to deep red with a significant enhancement in their emission intensity to “turn on” a yellow fluorescence. In addition, probe 3a could optically discriminate the presence of cyanide ions over other anions by a colour change from colourless to deep yellow with an enhancement of green fluorescence in aqueous-acetonitrile medium (1:1 v/v). Job’s plot experiments revealed a 1:2 binding stoichiometry between the probes and fluoride or cyanide ions. A detailed analysis of the binding characteristics of probe 3a with fluoride and cyanide ions have been further carried out by 1H NMR titration studies which indicates a good correlation between colorimetric, UV–vis and 1H NMR observations. These experimental results were further corroborated from the theoretical models using quantum chemical calculations.
52 citations
TL;DR: In this article, three polar Ni(II), Cu(II)- and Zn(II) complexes of salicylidene anthranilate sodium salt ligand were synthesized.
Abstract: Three polar Ni(II)-, Cu(II)- and Zn(II)-complexes (M-SSA) of salicylidene anthranilate sodium salt ligand were synthesized. The ligand (H2SSA) and its corresponding metal-complexes are characterized by alternative physico-chemical tools in which H2SSA acts as tridentate bi-basic chelating agent. Catalytic potential of M-SSA was investigated in the homogenous oxidation of 1,2-cyclohexene at 80 °C in acetonitrile, water or under solvent-free condition. M-complexes exhibit high catalytic reactivity with high chemoselectivity in acetonitrile. Cu-SSA shows the highest catalytic potential for the oxidation of 1,2-cyclohexene than Ni-SSA or Zn-SSA. The lowest yield of the epoxy-product was obtained in water due to the hydrolysis ring opening reaction affording 1,2-cyclohexanediol. The inhibition performance of H2SSA and M-SSA on the carbon steel corrosion (CS) in HCl was studied using electrochemical techniques. The inhibition capability was increased with increasing inhibitor dose. The adsorption of inhibitors on the surface of CS obeyed the Langmuir isotherm paradigm. Surface characterizations (SEM/EDX) revealed that the investigated compounds adsorbed on CS surface and form protective layer that shield the surface from direct corrosion attack. The experimental data have been completed by density functional theory treatment. The obtained theoretical results are exceedingly in agreement with empirical results catalytically and inhibitory.
48 citations
TL;DR: In this paper, the authors presented novel ink systems for perovskite precursors composed of protic ionic liquids (PILs) based on methylammonium cation and carboxylate anion and their binary blends with water, alcohols and acetonitrile for solution processing of CH3NH3PbX3.
41 citations
TL;DR: A transition metal-free cross-dehydrogenative coupling of coumarins with acetonitrile or acetone has been established and a radical pathway was proposed to describe the cross- dehydrogenic coupling of cationic coumarin with aconetitrile.
Abstract: A transition metal-free cross-dehydrogenative coupling of coumarins with acetonitrile or acetone has been established. A series of coumarins were subjected to reaction with acetonitrile or acetone in the presence of tert-butyl benzoperoxoate and potassium fluoride for direct synthesis of 3-cyanomethyl (or acetomethyl) coumarins. The method exhibits good functional group tolerance, and desired products were obtained in moderate to good yields. Meanwhile, a radical pathway was proposed to describe the cross-dehydrogenative coupling of coumarins with acetonitrile.
38 citations
TL;DR: Amide-functionalized MOF shows high selectivity for sensing of nitroaromatic compounds such as nitrophenol, nitroaniline, and nitrobenzene in acetonitrile solution due to fluorescence quenching effect.
37 citations
TL;DR: In this article, an iron tetraphenyl porphyrin complex substituted by positively charged trimethylammonio groups at the para position of each phenyl ring and reduction with three electrons by the excited state of an iridium sensitizer (λ > 420 nm) reduce CO2 to CO and to CH4 in both acetonitrile and aqueous solutions with good selectivity.
Abstract: Solar fuels may be generated upon visible light induced catalytic reduction of carbon dioxide. This appealing approach remains highly challenging, especially when earth abundant catalysts, mild conditions, and water as a solvent were used. Employing an iron tetraphenyl porphyrin complex substituted by positively charged trimethylammonio groups at the para position of each phenyl ring and reduction with three electrons by the excited state of an iridium sensitizer (λ > 420 nm) reduce CO2 to CO and to CH4 in both acetonitrile and aqueous solutions (acetonitrile/water 3:7 v:v) with good selectivity. Stability of the catalytic system remains a weakness and the reasons were analyzed.
34 citations
TL;DR: This work shows that miscibility with the lowest dielectric solvent, dichloroethane, is directly attributed to ion solvation enhancement mediated by both electronic and conformational polarization of the solvent molecules, implying that explicitly polarizable force fields are essential for modeling many of the organic electrolytes that are used in electrochemical applications.
Abstract: Organic electrolytes are unique in that their constituent solvents may be of much lower dielectric strength than water. This is because the ions of organic electrolytes are often those that comprise room-temperature ionic liquids, which are surprisingly miscible with many different organic solvents of low dielectric strength. Strong ion correlation results from the relatively low dielectric screening of the solvent, resulting in properties that can substantially deviate from Debye–Huckel descriptions; in addition remains the fundamental question of why the ionic liquids and low dielectric solvents are even miscible in the first place. In this work, we study electrolyte mixtures composed of the room-temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM+][BF4–] mixed with four solvents of systematically varying dielectric strength, 1,2-dichloroethane, acetone, acetonitrile, and water. We show that miscibility with the lowest dielectric solvent, dichloroethane, is directly attributed t...
TL;DR: The photophysical properties, gel formation, hierarchical structures, surface wettability, and their function in this self-assembly system could be tuned through the molecular isomer effect.
Abstract: A series of naphthalimide derivative gelators (G-o, G-m, and G-p) with three molecular isomers as their terminal groups were designed and synthesized. Only G-m and G-p could form stable organogels in some solvents including methanol, acetonitrile, n-hexane, toluene, ethanol, DMSO, DMF, and mixed solvents of acetonitrile/H2O (1/1, v/v). The different self-assembly structures were obtained from the self-assembly process of G-o, G-m, and G-p such as structures like a Chinese chestnut formed by irregular micrometer pieces, microbelts, and microbelt structures mingled with the bird’s nest structures which exhibited different surface hydrophobicity with water contact angles of 121–139° due to their different intermolecular noncovalent interactions. To our surprise, G-p acetonitrile solution emitted 492 nm light with a red-shift of 72 nm compared with that emitted from G-o and G-m acetonitrile solution under 350 nm light excitation. Three gelators showed different detection abilities toward metal ions. G-o did n...
TL;DR: In this paper, the use of acetonitrile as an alternative solvent to nitromethane was investigated for post-process immersion of polymeric semiconducting films into a polyoxometalate (PMA) solution.
Abstract: The immersion of polymeric semiconducting films into a polyoxometalate (PMA) solution was found to lead to electrical doping over a limited depth, enabling the fabrication of organic photovoltaic devices with simplified geometry; yet, the technique was highly solvent selective and the use of nitromethane was found to be limiting. Here, we report on the use of acetonitrile as an alternative solvent to nitromethane. Morphology studies on pristine and PMA doped P3HT films suggest that dopants reside in between the lamella of the polymer, but cause no distortion to the P3HT π–π stacking. With this information, we propose an explanation for the observed solvent-selectivity of the doping method. Degradation studies reveal a superior stability of films doped with PMA in acetonitrile. Based on these findings, we believe that the post-process immersion technique, when dissolving PMA in acetonitrile, is a more suitable candidate to conduct solution-based electrical p-doping of organic semiconductors on an industrial scale.
TL;DR: A quinoline-based C3-symmetric fluorescent probe has been developed which can selectively detect Zn2+ without the interference of Cd2+via significant enhancement in emission intensity (fluorescence "turn-ON") associated with distinct fluorescence colour changes and very low detection limits.
Abstract: A quinoline-based C3-symmetric fluorescent probe (1), N,N′,N′′-((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(1-(quinolin-2-yl)-N-(quinolin-2-ylmethyl)methanamine), has been developed which can selectively detect Zn2+ without the interference of Cd2+via significant enhancement in emission intensity (fluorescence “turn-ON”) associated with distinct fluorescence colour changes and very low detection limits (35.60 × 10−9 M in acetonitrile and 29.45 × 10−8 M in 50% aqueous buffer (10 mM HEPES, pH = 7.4) acetonitrile media). Importantly, this sensor is operative with a broad pH window (pH 4–10). The sensing phenomenon has been duly studied through UV-vis, steady-state, and time-resolved fluorescence spectroscopic methods indicating 1 : 3 stoichiometric binding between 1 and Zn2+ which is further corroborated by 1H NMR studies. Density functional theoretical (DFT) calculations provide the optimized molecular geometry and properties of the zinc complex, 1[Zn(ClO4)]33+, which is proposed to be formed in acetonitrile. The results are in line with the solution-state experimental findings. The single crystal X-ray study provides the solid state structure of the trinuclear Zn2+ complex showing solubility in an aqueous buffer (10 mM HEPES, pH = 7.4). Finally, the resulting trinuclear Zn2+ complex has been utilized as a fluorescence “turn-OFF” sensor for the selective detection of pyrophosphate in a 70% aqueous buffer (10 mM HEPES, pH = 7.4) acetonitrile solvent with a nanomolar detection limit (45.37 × 10−9 M).
TL;DR: A Co complex with a redox-active bis(pyridylmonoimine) ligand has been prepared and shows catalytic activity for electrochemical CO2 reduction in acetonitrile.
TL;DR: Chiral recognition ability of most chiral selectors towards studied sulfoxides was higher in pure acetonitrile compared to previously studied methanol and the effect of water addition to the mobile phase on analyte retention and enantioseparation was also quite different from that observed with methnol.
TL;DR: In this paper, the role of solvent system plays in determining the properties of the resulting perovskite films is poorly understood; however, significant steps are being made toward their commercialization, and significant differences are observed in the chemistry and electronic structure of CH3NH3PbI3 films made with each solvent.
Abstract: Perovskite-based photovoltaics are an emerging solar technology with lab scale device efficiencies of over 22 %, and significant steps are being made toward their commercialization. Conventionally high efficiency perovskite solar cells are formed from high boiling point, polar aprotic solvent solutions. Methylammonium lead iodide (CH3NH3PbI3) films can be made from a range of solvents and blends; however, the role the solvent system plays in determining the properties of the resulting perovskite films is poorly understood. Acetonitrile (ACN), in the presence of methylamine (MA), is a viable nontoxic solvent for fabrication of CH3NH3PbI3 photovoltaic devices with efficiencies >18 %. Herein we examine films prepared from ACN/MA and dimethylformamide (DMF) and scrutinize their physical and electronic properties using spectroscopy, scanning probe imaging, and ion scattering. Significant differences are observed in the chemistry and electronic structure of CH3NH3PbI3 films made with each solvent, ACN/MA produc...
TL;DR: A continuous-flow protocol for the synthesis of diazo acetonitrile was developed and it was further applied in iron-catalysed insertion reactions of diazonitrile into N-H and S-H bonds to yield valuable α-substituted aconetitrile, including gram-scale synthesis.
Abstract: A continuous-flow protocol for the synthesis of diazo acetonitrile was developed It was further applied in iron-catalysed insertion reactions of diazo acetonitrile into N-H and S-H bonds to yield valuable α-substituted acetonitrile, including gram-scale synthesis
TL;DR: The first solid state porphyrin dication of a weak carboxylic acid was synthesized through the reaction of meso-tetrakis(N-methylpyridinium-4-yl)porphyrin (H2TMPyP) supported on the sodium salt of Amberlyst 15 nanoparticles (nanoAmbSO3Na) with formic acid.
TL;DR: Chemos sensor L produced a strong fluorescence response with an enhancement of very high fluorescence intensity while addition of CN- ion and the strength of the chemosensor L towards cyanide binding is found to be 3.9813×104M-1.
TL;DR: This work is an unprecedented example of redox interconversion between a high-spin Co(II) disulfide compound and a low- spin Co(III) thiolate compound triggered by the nature of the anion.
Abstract: The redox interconversion between Co(III) thiolate and Co(II) disulfide compounds has been investigated experimentally and computationally. Reactions of cobalt(II) salts with disulfide ligand L1SSL1 (L1SSL1 = di-2-(bis(2-pyridylmethyl)amino)-ethyl disulfide) result in the formation of either the high-spin cobalt(II) disulfide compound [CoII2(L1SSL1)Cl4] or a low-spin, octahedral cobalt(III) thiolate compound, such as [CoIII(L1S)(MeCN)2](BF4)2. Addition of thiocyanate anions to a solution containing the latter compound yielded crystals of [CoIII(L1S)(NCS)2]. The addition of chloride ions to a solution of [CoIII(L1S)(MeCN)2](BF4)2 in acetonitrile results in conversion of the cobalt(III) thiolate compound to the cobalt(II) disulfide compound [CoII2(L1SSL1)Cl4], as monitored with UV–vis spectroscopy; subsequent addition of AgBF4 regenerates the Co(III) compound. Computational studies show that exchange by a chloride anion of the coordinated acetonitrile molecule or thiocyanate anion in compounds [CoIII(L1S)(M...
TL;DR: In this article, three imidazolium-based ionic liquids (ILs) with different anions were tested as entrainers to separate acetonitrile and methanol mixtures.
TL;DR: Holding steady state fluorescence quenching measurements of a coumarin derivative namely 3-hydroxy-3-[2-oxo-2-(3-Oxo-3H-benzo[f]chromen-2-yl)-ethyl]-1,3-dihydro-indol- 2-one (3HBCD) in a binary mixture of acetonitrile and 1,4-dioxane is narrated.
Abstract: Photo physical properties of fluorescent organic compounds give an immense improved knowledge on characteristics of excited state that is beneficial to devise innovate molecules and understand their performance in particular applications. Coumarin derivatives have been extensively investigated in this regard. This article narrates steady state fluorescence quenching measurements of a coumarin derivative namely 3-hydroxy-3-[2-oxo-2-(3-oxo-3H-benzo[f]chromen-2-yl)-ethyl]-1,3-dihydro-indol-2-one (3HBCD) in a binary mixture of acetonitrile and 1,4-dioxane. Aniline is used as quencher. Fluorescence intensity is large in acetonitrile and decreases as the percentage of 1,4-dioxane in the solvent mixture increases. With modest quencher concentration a deviation towards the x axis is noticed in the Stern-Volmer (S-V) plots. This downward curvature is interpreted as due to the presence of 3HBCD in different conformers in the lowest energy level. Ground state intramolecular hydrogen bonding formation is observed due to the conformational changes in the solute. Figured estimations of various quenching parameters recommend that, while dynamic quenching prompts linearity in S-V plot at lower quencher concentration, increasing quenching efficiency with increasing medium viscosity suggests that reaction is not entirely controlled by material diffusion. Stern-Volmer constant increases with decreasing medium dielectric constant.
TL;DR: In this article, the solvent effect on the efficiency of the sulfide photooxidation reaction was investigated using acetonitrile, 1,2-dichloroethane (DCE) and toluene.
TL;DR: In this article, the synthesis of aryldiazonium tetrachloroaurate(III) salts was carried out by the oxidation of anilines, dissolved in HCl, using sodium nitrite followed by the exchange of the counter anion with [AuCl4]- in water.
TL;DR: It is demonstrated that use of a minute amount of polar carrier solvents of different types significantly enhances the gelling ability of seven structurally different organogelators in hydrophobic oil.
Abstract: Use of carrier solvents to assist dissolution of phase-selective organogelators (PSOGs) before application in oil gelation is a common approach for solution-based gelators. Because of the competition in H-bonds by the polar carrier solvent, decreased gelling ability of PSOGs was often observed. That is, while data are available, the previously documented biphasic minimum gelling concentrations (BMGCs) are much larger than the MGCs determined using heating–cooling cycle for the same PSOG against the same oil. In this study, we show that, by minimizing amount of polar carrier solvent used, the gelling ability of PSOGs actually can be enhanced very substantially, rather than being weakened. More specifically, we demonstrate that use of a minute amount of polar carrier solvents of different types (e.g., ethyl acetate, acetone, acetonitrile, and tetrahydrofuran) significantly enhances the gelling ability of seven structurally different organogelators in hydrophobic oil. In particular, with the use of 5 vol % e...
TL;DR: DFT B3LYP calculations convincingly showed that aromatic pnictogen oxides offer scaffolds suitable for tailoring powerful organic superbases exhibiting exceptional oxygen basicity in both the gas phase and polar aprotic acetonitrile solution.
Abstract: DFT B3LYP calculations convincingly showed that aromatic pnictogen-oxides offer scaffolds suitable for tailoring powerful organic superbases exhibiting exceptional oxygen basicity in both gas-phase and polar aprotic acetonitrile solution. With their protonation enthalpies and pKa values, they surpass the basicity of classical proton sponges and related nitrogen bases. The most potent system is provided with two arsenic-oxide moieties on the phenanthrene framework assisted with the two phosphazeno groups in the para-position to both basic centers. With its proton affinity PA = 300.5 kcal mol-1, the latter system breaks the gas-phase hyperbasicity threshold of 300 kcal mol-1, while its pKa = 54.8 promotes it as an unprecedented superbase in acetonitrile. The origin of such a dramatic basicity enhancement is traced to a fine interplay between (a) steric repulsions of the two negatively charged oxygens destabilizing a neutral base, (b) a favorable intramolecular [O–H.....O]- hydrogen bonding in conjugate acid...
TL;DR: In this paper, a novel acrylonitrile embedded benzimidazole-based probe 3 has been designed and synthesized by conjugating anthraquinone with 2-(1H-benzo[d]imidaxol-2-yl)acetonitrile.
Abstract: A novel acrylonitrile embedded benzimidazole-based probe 3 has been designed and synthesized by conjugating anthraquinone with 2-(1H-benzo[d]imidazol-2-yl)acetonitrile. The probe 3 potentially detects CN− ions in H2O/CH3CN (1:9; v/v), solid state, and plasma-like solution via chromo and fluorometric approach. The probe 3 displayed an absorption redshift from 415 nm to 472 nm and emission redshift from 510 nm to 610 nm in the presence of CN− ions, in H2O/CH3CN (1:9; v/v). The probe 3 displayed colour change from yellow to orange along with red emission in the presence of CN− ions. The probe 3 showed very low detection limit of 37 × 10−9 M. Furthermore, probe 3 is also utilized as a portable paper strip for on-site detection of CN− ions. The 1H NMR and mass spectrometry analysis confirmed the nucleophilic addition of CN− ions to probe 3.
TL;DR: A PNP-ruthenium pincer complex catalyzed the α-deuteration of aliphatic nitriles including acetonitrile with efficient deuteration occurred with a low catalyst load and under mild conditions.
TL;DR: In this article, a novel copper (II) catalyst supported on polyethylenimine-functionalized magnetic graphene oxide (denoted Cu@PEI-MGO) has been developed and applied for the cyclization of benzylacetamide with 2-aminobenzamide to afford 2-arylquinazolin-4(3H)-ones in acetonitrile as an inexpensive, non-toxic and reusable solvent medium.
Abstract: A novel copper (II) catalyst supported on polyethylenimine-functionalized magnetic graphene oxide (denoted Cu@PEI-MGO) has been developed and applied for the cyclization of benzylacetamide with 2-aminobenzamide to afford 2-arylquinazolin-4(3H)-ones in acetonitrile as an inexpensive, non-toxic and reusable solvent medium. Cu@PEI-MGO was characterized by transmission electron microscopy, scanning electron microscopy, thermo-gravimetric analysis, and Fourier-transform infra-red spectroscopy.