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The ability of 2,6-bis(2-benzimidazolyl)pyridine (bbp) as an optical sensor was studied by fluorescence spectroscopy, colorimetric and UV-visible techniques. The fluorescence spectra of bbp demonstrated a red-shifted upon addition of Zn2+ ion, whereas rest of the cations did not induce any shift. Selectivity of the sensor was examined toward Zn2+ in the presence of a wide range of cations, as interfering...
An efficient method for the synthesis of spiroquinazolinones was developed using isatoic anhydride, hydrazides and cyclic ketones, through a rapid one-pot three-component reaction in the presence of SBA-Pr-SO3H under solvent-free conditions. SBA-Pr-SO3H was an efficient heterogeneous nanoreactor with a pore size of 6 nm which can be easily handled and removed from the reaction mixture by simple filtration...
A nanoporous carbon (CMK-3) was synthesized and used to adsorb 2-phenylethanol (PEA) from aqueous solutions. The characterization of CMK-3 by N2 adsorption isotherm revealed the formation of a nanoporous carbon with average pore diameter and surface area of 3.34 nm and 1268 m2 g−1, respectively. Column-like particle morphology of CMK-3 was observed from scanning electron microscope images. To evaluate...
Indandione is an important starting material that has drawn great attention in various organic transformations because of its attributes, such as low cost, easy to handle and eco-friendliness generally affording the corresponding products in excellent yields. In this review, we summarize recent data describing the most important MCRs reactions in which one of the starting materials is indandione....
Ce doped ZnTiO3 as a novel catalyst with highly efficient and stable sonocatalytic activity was synthesized via an ultrasound-assisted sol–gel method using non-ionic surfactant Pluronic F127 as structure directing agent. Synthesized samples were characterized by using various techniques, such as XRD, TEM, SEM, EDX, XRF, BET, DRS, and PL, and their sonocatalytic activity studied toward degradation...
Fluorene‐di‐ammonium‐functionalized mesoporous silica (FDMS) was prepared through post synthesis grafting method of SBA‐15. The obtained material was characterized by means of small and wide angle X‐ray diffraction, nitrogen adsorptiondesorption, Fourier transform infrared spectroscopy, Raman spec‐ troscopy, thermo gravimetric analysis and elemental analysis. The results showed that the original...
Sulfonic acid functionalized SBA-15 nanoporous material (SBA-Pr-SO3H) with a pore size of 6nm was found to be a green and effective solid acid catalyst in the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under solvent-free conditions. SBA-Pr-SO3H was proved to be a recyclable, green, and highly efficient catalyst which could be easily handled, recovered, and reused...
Removal of two triphenylmethane dyes, Acid Fuchsin (AF) and Malachite green (MG), was studied by hybrid advanced oxidation processes of homogeneous (UV/Fe2+/H2O2) and heterogeneous (UV/TiO2−SiO2) photocatalysis. A comparison of various processes for removal of model pollutants was performed. The results showed that the utilizing hybrid photocatalytic processes in the presence of silica leads to rapid...
A novel organic-inorganic hybrid material was designed and prepared by grafting 8-hydroxyquinoline on the surface of SBA-15 via click reaction for optical sensing of ions. The characterizations were performed using low-angle X-ray diffraction, N2 adsorption-desorption, FT-IR and thermal gravimetric analysis confirming the successful attachment of the organic moieties onto the walls and the preservation...
Mesoporous silica SBA-15 functionalized with 8-hydroxyquinoline-5-sulfonic acid (HQS-SBA-15) was used as a new recyclable nanocatalyst for the one-pot synthesis of 2-thiohydantoin derivatives under solvent-free conditions. The catalyst exhibited excellent recyclability at least for 3 times with a high catalytic activity.
1,2-Bis(2-hydroxymethylphenoxy)ethane was synthesized and characterized by FT-IR and 1H NMR spectroscopy, and single crystal X-ray diffraction method. The sensing ability of the sensor was studied in the presence of different cations and anions. Following the excitation wavelengths at 275nm in EtOH/H2O (1:9, v/v) and 310nm in MeCN/H2O (1:9, v/v), two distinct emissions at 305 and 356nm were obtained,...
An efficient one-pot synthesis of 2,3-dihydroquinazoline-4(1H)-one derivatives 4a–l is described using SBA-Pr-SO3H as a heterogeneous acid catalyst. The present methodology resulted in various derivatives of 2,3-dihydroquinazoline-4(1H)-one in good yield via a three-component reaction of isatoic anhydride, aldehydes and ammonium acetate. SBA-Pr-SO3H played a significant role as an efficient mesoporous...
Two new Hg(II) coordination compounds containing the tris(2-pyridylmethyl)amine (TPA) ligand were synthesized by conventional and sonochemical methods, characterized by spectroscopic techniques (FT-IR and elemental analysis) and their X-ray crystallographic structures were determined. The crystal packing and supramolecular features of these coordination compounds were studied using geometrical analysis...
Asymmetric synthesis is one of the important topics in organic synthesis. Hydrazide compounds are valuable substrates in the fields of both chemical reactions and medicinal chemistry due to their chemical reactivity and biological activities, respectively. In this review, the role of hydrazides as substrates and/or chiral catalysts are investigated in the asymmetric organic reactions to gain chiral...
A highly ordered mesoporous silica material functionalized with isatin (SBA-Pr-IS) was designed and synthesized. Characterization techniques including XRD, TGA, BET, SEM, and FT-IR were employed to characterize the pore structure, textural properties, microscopic morphology, and molecular composition of grafted organic moieties of SBA-Pr-IS. The successful attachment of the organic moiety (0.34 mmol g...
A new method has been introduced for synthesizing of carboxyl-rich g-C3N4 nanoparticles through a facile procedure from g-C3N4 nanosheets prepared by one-pot thermal polymerization of dicyandiamide under nitrogen atmosphere. The formation of these nanosheets was confirmed by the AFM, XRD, FESEM and FTIR analyses. These nanosheets subsequently were transformed to carboxyl-rich nano structures through...
A novel silica-based chemosensor (SBA-Is-INH) was prepared through the functionalization of mesoporous silica SBA-15 material with a fluorescent chromophore, (Z)-N'-(2-oxoindolin-3-ylidene)isonicotinohydrazide. The synthesized materials were characterized by different techniques such as low angle XRD, N2 adsorption-desorption, TGA, TEM and FT-IR spectroscopy. The data showed that the organic moiety...
A novel organic–inorganic hybrid nanomaterial (SBA-15-CA) was prepared by covalent immobilization of chromotropic acid onto the surface of mesoporous silica material SBA-15. Different techniques such as XRD, TEM, FT-IR, N2 adsorption–desorption and TGA analyses were employed to characterize the grafting process. The data showed that the organic moiety (0.41 mmol g−1) was successfully grafted to the...
In this study polyhedral oligomeric silsesquioxane (POSS) with multifunctional sulfonamide groups were synthesized via click reaction (copper catalyzed Huisgen 1,3-dipolar cycloaddition reaction) between octakis(3-azidopropyl)octasilsesquioxane (POSS-(N3)8) and propargylated sulfonamides. Propargyl containing sulfonamides were synthesized by direct propargylation of sulfonamids (sulfadiazine, sulfadimidine...
Photocatalytic and catalytic activity of NiO loaded on mixture of anatase/rutile phases of TiO2 nanoparticles were investigated for some organic reactions including selective oxidation of alcohols, synthesis of benzimidazoles and preparation of imines at room temperature. The p–n junction formed between NiO and TiO2 as well as difference between band gaps in anatase/rutile phases facilitated electron...