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• A new complex of Cu (II) formulated as [Cu (Tu) 3 ] n [Cu (Tu) 3 ] ·2(pzdc) has been synthesized. • Single crystal X-ray diffraction revealed Cu1 forms a coordination polymer. • The synthesized complex was used as a catalyst for the selective oxidation of thioanisole. • The corresponding sulfoxides were obtained with excellent selectivity. This study reports the synthesis of a new coordination polymer of Cu (II) formulated as [Cu (Tu) 3 ] n [Cu(Tu) 3 ]·2(pzdc) (1) where tu = thiourea, and (pzdc)2− = 2,3-pyrazinedicarboxylate. Complex 1 was characterized by elemental analysis (CHN), Fourier transformed-infrared (FT-IR) spectroscopy, energy-dispersive X-ray spectroscopy (EDXS or EDS), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). The molecular structure of complex 1 has been confirmed by single-crystal X-ray diffraction (SC-XRD). The SC-XRD results show that complex 1 crystallized in a monoclinic crystal system with space group P 2 1 /c and metal centers Cu1 and Cu2 adopted slightly distorted tetrahedral and triangular geometry, respectively. The molecular structure of complex 1 is stabilized by a dense network of hydrogen bonds such as N H⋯O, besides electrostatic attraction. Complex 1 was used as a catalyst for the selective oxidation of thioanisole and a number of sulfides to the corresponding sulfoxides or sulfones with high conversion and high selectivity in the presence of hydrogen peroxide as a green oxidant. The results showed that complex 1 accelerates the conversion of sulfides. The influence of varying parameters such as catalyst dosage, temperature, solvent, and H 2 O 2 /substrate molar ratio were examined in an attempt to optimize the conversion of thioanisole and, in particular, to improve the selectivity of the desired products (sulfoxides). Then, the optimized conditions were used to investigate the generality of catalytic activity of complex 1 to oxidize several other sulfides to its sulfoxide's analogues, that corresponding sulfoxides were obtained with excellent selectivity in most cases (up to 84 %) through high conversion of sulfides (up to 82 %). [Display omitted] [ABSTRACT FROM AUTHOR]

A new paramagnetic heteronuclear complex formulated as [K3Fe(μ-ox)3(H2O)3]n (1), where ox2− is oxalate, has been synthesized under hydrothermal condition. The molecular structure of complex 1 was characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR) and single-crystal X-ray diffraction (SCXRD). The results of SC-XRD analysis revealed that complex 1 crystallizes in the centrosymmetric space group P21/c of a monoclinic system with cell dimension a = 7.7175 (4) Å, b = 19.8009 (7) Å, c = 10.2623 (5) Å, and β = 107.634 (5)° at 100 K. The thermal behavior of complex 1 was studied by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The magnetic behavior of complex 1 was studied at room temperature by a vibration sample magnetometer (VSM). Thermal decomposition of the silica and alumina supports of complex 1 at 650 °C resulted in the main catalysts, Fe2O3-K2O/SiO2 and Fe2O3-K2O/Al2O3. The catalytic activity of the main catalysts was evaluated for CO hydrogenation. For comparative purposes, the reference catalysts of Fe2O3-K2O/SiO2 and Fe2O3-K2O/Al2O3 were prepared by the impregnation method. The structure and composition of the catalysts were investigated by FT-IR spectroscopy, powder X-ray diffraction (PXRD), N2 adsorption–desorption analysis, scanning electron microscopy (SEM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and energy dispersive X-ray analysis (EDX). We tested all catalysts for hydrogenation of CO at 5 bar of pressure in the temperature range of 593–673 K. It was found that the main catalysts have better CO conversion and selectivity to desired products, such as light olefins, than the reference catalysts. [ABSTRACT FROM AUTHOR]

A new copper (II) coordination complex formulated as [Cu (dipic)(phen)(2‐MePy)]. 2H2O (1) where phen = 1, 10‐phenanthroline, dipic2− = pyridine‐2,6‐dicarboxylato and 2‐MePy = 2‐methyl pyrrole was synthesized through a simple and environment‐friendly reaction under ultrasound irradiation. Also, complex 1 was synthesized by hydrothermal process at 120 °C for 3 days. The corresponding structure of complex 1 was characterized by elemental analysis, atomic absorption spectroscopy (AAS), inductively coupled plasma (ICP), conductivity measurement, Fourier‐transform infrared spectroscopy (FT‐IR), Raman spectroscopy, ultraviolet–visible spectroscopy (UV–Vis), thermal gravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and fluorescence. The crystal structure of the hydrothermally synthesized complex was characterized by single crystal X‐ray diffraction (SC‐XRD(, which revealed a triclinic structure. In the remainder of this study, the Cu2O nanoparticles have been prepared via thermal decomposition of hydrothermal and ultrasound complexes and characterized by ICP, FT‐IR, powder X‐ray diffraction (XRD), SEM and N2 adsorption/desorption. Adsorption and visible‐light‐driven photocatalytic capabilities of two synthetic Cu2O were investigated in the removal of MB from water. The result showed that the synthesized catalysts have good catalytic activity and the photocatalytic degradation is more effective in dye removal of MB compared with the adsorption. Highlights: A new complex, [Cu (dipic)(phen)(2‐MePy)]. 2H2O (1) has been synthesized under different conditions.The structure of complex 1 was studied by single crystal X‐ray diffraction.Nanoparticles of Cu2O were prepared by thermal analysis of synthesized complexes.Adsorption and photocatalytic activity of synthetic Cu2O were investigated in the removal of MB.The results showed that the photodegradation is more effective in the removal of MB compared with the adsorption. [ABSTRACT FROM AUTHOR]

A novel zinc-based pseudohalide metal–organic complex formulated as [Zn(NCS) 4 ].2(C 9 H 8 N) (1) (C 9 H 7 N = quinoline) has been synthesized by a sonochemical process. The structure of 1 has been characterized by elemental analysis, atomic absorption spectroscopy (AAS), Fourier-transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), differential thermal analysis (DTA) and single-crystal X-ray diffraction (SC-XRD). Complex 1 crystallizes in a monoclinic system, space group P 2 1 /c with unit cell parameters a = 8.5406(6) Å, b = 35.6706(17) Å, c = 8.6418(6) Å, and β = 107.093(7)º. Its structure consists of a tetrahedral [Zn(NCS) 4 ] complex and two molecules of quinoline. In the crystal lattice of complex 1, the [Zn(NCS) 4 ]2- complex anion is stacked in hexagonal-like columns forming 2D layers, each column includes an organic chain formed from one of [C 9 H 8 N]+ organic cations where the other cation separates between layers. The hydrogen bonds and some weak interactions are responsible for linking and strengthening the whole structure. Magnetic measurements revealed that complex 1 is a weak ferromagnet at room temperature. Nanoparticles of ZnO have been successfully synthesized by thermal decomposition of 1 and characterized by FT-IR spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and Brunauer–Emmett–Teller N 2 adsorption-desorption analysis. The photocatalytic activity of commercial ZnO and as-obtained ZnO was investigated for degradation of methyl orange (MO) and Bisphenol A (BPA) under UV irradiation. The results revealed that the synthetic ZnO had higher catalytic activity than the commercial ZnO and the highest degradation occurs at pH = 4 and pH = 8 for MO and BPA, respectively. Image 109346 • A novel complex of [Zn(NCS) 4 ].2(C 9 H 8 N) (1) was synthesized. • The structure of complex 1 was studied by single crystal X-ray diffraction. • Magnetic measurement revealed that 1 is a weak ferromagnet. • Nanoparticles of ZnO have been obtained by thermolysis of 1. • The photodegradation ability of ZnO was evaluated using methyl orange. [ABSTRACT FROM AUTHOR]

A new polymer formulated as [(NIH) (Cl) Mn 1 (µ-NIH) 2 Mn 2 (Cl)) (H 2 O) 2 ] [(NIH) (H 2 O) Mn 3 (µ-NIH) 2 Mn 4 (H 2 O) 3 ] n ·6Cl·4H 2 O·NIH has been synthesized. Single crystal X-ray diffraction revealed two 1D anionic coordination polymers. The antioxidant behavior of the Mn complex was tested through a DPPH assay. The Mn complex reduces DPPH activity at a concentration of 50 mg L−1 to about 82%. The Mn complex, increases the stability of the secondary structure of the BLC by increasing the α-helix. [Display omitted] A new polymer of Mn (II) formulated as [(NIH) (Cl) Mn 1 (µ-NIH) 2 Mn 2 (Cl)) (H 2 O) 2 ] [(NIH) (H 2 O) Mn 3 (µ-NIH) 2 Mn 4 (H 2 O) 3 ] n.6Cl·4H 2 ONIH, where NIH = 4-Pyridinecarboxylic acid hydrazide = Isoniazid = Isonicotinic acid hydrazide has been synthesized and characterized by elemental analysis, Fourier-transform infrared spectroscopy) FT-IR (, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Powder X-ray Diffraction(PXRD), and single crystal X-ray structure (SC-XRD). SC-XRD results revealed two 1D anionic coordination polymers which are accompanied by four water molecules, one isoniazid molecule, and six chlorine ions. Parallelepiped light orange crystals of Mn complex crystallize in a triclinic system with space group P 1. Centers of Mn1, Mn2, Mn3, and Mn4 adopted slightly distorted octahedral. The antioxidant behavior of the Mn complex was tested through a DPPH assay and found that the Mn complex has a good performance in decolorizing the DPPH solution, so it reduces DPPH activity at a concentration of 50 mg L−1 to about 82%. Reactive oxygen species can cause oxidative stress in organisms. Catalase as a valuable antioxidant enzyme can play a protective role. Spectral techniques were used to investigate the effect of the Mn complex on the structure and function of bovine liver catalase (BLC). The catalytic activity of the BLC was significantly improved with the Mn complex. Fluorescence and CD results showed that this complex can induce the environmental changes of amino acid residues (especially Trp) and increase the stability of the secondary structure of the BLC by increasing the α-helix. The interaction process was spontaneous and exothermic, and the most important forces involved in it were van der Waals forces and hydrogen bonds. [ABSTRACT FROM AUTHOR]

[Display omitted] • A new compound of Bi (III) has been synthesized. • The title complex crystallizes in a triclinic system with space group P -1. • Quantum mechanical studies were performed on the complex 1. • Complex 1 was assessed as a drug against three standard laboratory strains of H. pylori. • The complex showed excellent activity against H. pylori with MIC = 8.84 μM. A new Bi (III) coordination compound formulated as [Bi 2 (µ-ox)(dipic) 2 (taa) 4 ].2H 2 O (1) where ox2− = oxalato, dipic2− = pyridine 2,6-dicarboxylato and taa = thiourea has been synthesized. Single-crystal X-ray diffraction (SC-XRD) analysis has been carried out to determine the structure of the complex. From SC-XRD data, it was found that complex 1 is a di-nuclear compound and the title complex crystallizes in a triclinic system with space group P -1. The coordination around of Bi (III) center is distorted pentagonal-bipyramidal. Hirshfeld surface (HS) and two-dimensional fingerprint analysis were performed to investigate the interactions between the complex and the crystallized water molecules. The results showed that the O...H bonds are decisive with a contribution portion of 35.7 %. Indeed, quantum mechanical studies were performed to understand effective factors on the stability of complex 1. Complex 1 was assessed as a drug against three standard laboratory strains (26695, B128, and 251) of Helicobacter pylori (H. pylori). The results showed that the complex had excellent activity against the bacterium Helicobacter pylori with MIC = 8.84 μM. [ABSTRACT FROM AUTHOR]

[Cr(dipic)(2,2′-bipyridine).H 2 O] 2 ·4H 2 O 2 NO 3 (complex 1). [Display omitted] • A new water-soluble inorganic complex of Cr(III) has been synthesized. • The complex presents a the triclinic system with the space group P 1 ¯ . • The complex was used for mild peroxidative oxidation of toluene. • The complex shows the maximum catalytic activity of 43.4 %. • The reactions to this complex appear to follow a radical mechanism. A novel water-soluble inorganic complex of Cr(III), formulated as [Cr(dipic)(2,2′-bipyridine).H 2 O] 2 ·4H 2 O 2(NO 3) (complex 1) where dipic2- = pyridine 2,6-dicarboxylate was synthesized. Complex 1 has been characterized by elemental analysis, Fourier transformed-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), differential thermal analysis (DTA), and single-crystal X-Ray diffraction (SC-XRD). SC-XRD results revealed a triclinic system with space group P 1 ¯ for the expected composition. Each metal center is six-coordinates, and Cr(III) ions are in a distorted octahedral geometry. 1 is a zero-dimensional mononuclear complex that is expanded to a 3D supramolecular network by extensive hydrogen bonds between adjacent layers. The catalytic activity of complex 1 was evaluated towards the peroxidative oxidation (with hydrogen peroxide as a green oxidant) of toluene to the corresponding product (benzyl alcohol and benzaldehyde) in a homogenous medium under mild conditions. The influence of various parameters such as temperature, time, amounts of nitric acid, acetonitrile, catalyst, and n(H 2 O 2)/n(catalyst) was evaluated to optimize the catalytic system. Complex 1 exhibited high efficiency in the homogeneous oxidation system without requiring the presence of an acid promoter. In this reaction, under optimized conditions, toluene was oxidized to benzyl alcohol and benzaldehyde with a maximum total yield of 43.4 %. The study of the mechanism of reaction showed that this process is carried out through both carbon-centered and oxygen-centered radicals. Also, the reaction is promoted by the production of OH radicals that act as active oxidizing agents. [ABSTRACT FROM AUTHOR]

• A new heteronuclear Mn/Cu complex has been synthesized and characterized. • A mixed oxide alumina-supported Cu-Mn catalyst was prepared by thermolysis of complex 1. • The catalyst was examined for CO conversion in the low-temperature water-gas shift reaction. • The results showed strong surface structure-activity dependence. • Maximum CO conversion was achieved at 200 °C. A unique hetero-nuclear complex formulated as [Cu(pydc) 2 Mn(H 2 O) 5 ].2H 2 O (1) where pydc2− = pyridine-2,6-dicarboxylato has been synthesized through a facile and environment-friendly ultrasonic reaction. Complex 1 was characterized by various techniques, including single-crystal X-ray diffraction (SC-XRD). X-ray crystallographic analysis reveals that the parallelepiped green crystals of complex 1 have a monoclinic structure with space group P 2 1 / c. The CuII and MnII centers have distorted square bipyramid geometry, while extensive H-bonding interactions help to produce a three-dimensional network. The bimetallic Cu-Mn/Al 2 O 3 catalyst was prepared by thermal decomposition of [Cu(pydc) 2 Mn(H 2 O) 5 ].2H 2 O/Al 2 O 3. Also, a reference catalyst formulated as Cu-Mn/Al 2 O 3 was prepared via the impregnation conventional method. Characterization of catalysts was carried out using inductively coupled plasma mass spectrometry (ICP-MS), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET) surface area. The performance of the catalysts was evaluated for CO conversion in the low-temperature water-gas shift (LT-WGS) reaction in the temperature range of 160–240 °C. A comparison of the WGS performance of these catalysts points out the potential application of inorganic complex in LT-WGS reaction. The catalyst constructed by thermal decomposition of complex 1 shows higher activity than the reference catalyst prepared by the impregnation conventional method. [Display omitted] [ABSTRACT FROM AUTHOR]

This work reports the synthesis of a new water-soluble tri-hetero metallic polymer formulated as [Cu 0.152 Mn 0.848 (μ-dipic) 2 {Na 2 (μ-H 2 O) 4 }] n ·nH 2 O (1) where dipic2− ​= ​pyridine 2,6-dicarboxylato. Elemental analysis, fourier transformed-infrared (FT-IR) spectroscopy, thermogravimetric analyses (TGA), differential thermal analysis (DTA), vibration sample magnetometer (VSM), and single-crystal X-ray diffraction (SC-XRD) analysis were used for characterization of polymer 1. According to crystal structure analysis, polymer 1 belongs to a monoclinic system with space group C 2/ m , while cations of Cu2+ and Mn2+ occupy 15.2% and 84.8% of octahedral sites, respectively. The divalent ions of Mn2+ and Cu2+ show coordination number six, which have significantly distorted octahedral geometry. The as-synthesized polymer presents a 3D network extended by monomeric [Mn/Cu(dipic) 2 ]2– units and polymeric{[Na 2 (μ-H 2 O) 4 ]2+} n chains with extensive hydrogen bonding between crystal water molecules and adjacent layers. Polymer 1 was used as homogeneous catalyst for the mild oxidation of cyclohexane to the corresponding products (alcohol and ketone) in the presence of hydrogen peroxide as an environmentally friendly oxidant. To obtain the highest catalytic performance, various reaction parameters such as temperature, reaction time, the molar ratio of nitric acid to the catalyst, and the molar ratio of oxidant to the catalyst, were optimized. As a result, polymer 1 exhibited the maximum catalytic performance with a total product yield of 39.2% under optimized conditions. The mechanism of cyclohexane oxidation catalyzed by polymer 1 was also discussed. [Display omitted] • A new tri-hetero metallic polymer has been synthesized. • The polymer presents a 3D network extended by monomeric [Mn/Cu(dipic) 2 ]2– units and polymeric{[Na 2 (μ-H 2 O) 4 ]2+} n chains. • The catalytic activity of the polymer was investigated by peroxidative oxidation of cyclohexane. • The polymer exhibited the maximum catalytic performance with a total product yield of 39.2%. • Parameters such as temperature, reaction time, amount of catalyst, and H 2 O 2 was optimized. [ABSTRACT FROM AUTHOR]

A new Bi(III) complex has been synthesized. The SC-XRD analysis showed that the Bi(III) has a distorted pentagonal-bipyramidal geometry. Nanoscaled β-Bi 2 O 3 was prepared by calcination of Bi complex at 600 °C. The catalytic behavior of β-Bi 2 O 3 was evaluated for degradation of Rhodamine B. Synthetic β-Bi 2 O 3 showed better performance compared to commercial. [Display omitted] The present paper reports the synthesis of a new bi-nuclear Bi(III) complex with the formula [Bi 2 (µ-ox)(dipic) 2 (H 2 O) 2 (taa) 2 ].H 2 O where ox2−: oxalato, dipic2−: pyridine 2,6-dicarboxylato and taa: thiourea. Elemental analysis, Fourier transformed-infrared (FT-IR) spectroscopy, thermogravimetric analyses (TGA), differential thermal analysis (DTA) and single-crystal X-ray diffraction (SC-XRD) were used to determine the composition and structure of Bi complex. X-ray crystallographic data reveals that the complex is a binuclear compound and belongs to a monoclinic system with space group P 2 1 / n. The β-Bi 2 O 3 nanoparticles were prepared by thermal decomposition of Bi complex at 600 °C under air atmosphere. The synthetic β-Bi 2 O 3 has been characterized using various techniques. The catalytic behavior of β-Bi 2 O 3 was evaluated for degradation of Rhodamine B under visible light irradiation. The results showed that the synthetic β-Bi 2 O 3 has higher photocatalytic activity compared to the commercial β-Bi 2 O 3. It was found that the structural properties such as higher BET surface area and smaller particle size can improve the catalytic activity of β-Bi 2 O 3. [ABSTRACT FROM AUTHOR]

• A new Mn (II) complex of oxalate and isoniazid has been synthesized and characterized. • The single crystal X-ray analysis showed that the Mn(II) center has a distorted octahedral geometry. • At room temperature, Mn (II) complex is a weak ferromagnet. • The interaction between Mn(II) complex and catalase caused a moderate decrease in BLC activity. • The backbone of BLC unfolded slightly in the presence of Mn(II) complex. A new Mn(II) complex based on oxalato (ox2−) and isoniazid (INH), formulated as [Mn(µ-ox)(µ-NIH (N,O)) (µ-NIH (N)Cl] n (1) has been synthesized under sonochemical irradiation. The molecular structure of complex 1 was studied by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential thermal analysis (DTA), vibrating sample magnetometer (VSM), and single-crystal X-ray diffraction (SC-XRD). This complex belongs to a monoclinic system with space group P 2 1 / c. X-ray crystallography data revealed Mn(II), adopts a distorted octahedral geometry formed by two nitrogen atoms, three oxygen atoms, and one chloride anion. The results of VSM revealed that in the applied magnetic field up to 15,000 Oe, complex 1 is a weak ferromagnet. The interaction of complex 1 with bovine liver catalase (BLC) was investigated by spectroscopic methods. The enzymatic function of BLC decreased to 45.6% when the concentration of the complex was 6.0 × 10−6 M. Fluorescence results revealed that the combination of BLC with the complex is subjected to static quenching mechanism (K b = 1.73 and 0.38 × 105 M−1at 300 and 310 K, respectively). The interaction process was spontaneous, exothermic, and enthalpy-driven, with a major role of Van der Waals and hydrogen bond forces. UV-Vis, 3D, and synchronous fluorescence measurements indicated the changes in the microenvironment residues of BLC in the presence of complex 1. In conclusion, the above complex can interact with catalase and so inhibit its catalytic activity for the decomposition of hydrogen peroxide. [Display omitted] [ABSTRACT FROM AUTHOR]

• A new complex formulated as [Mn(phen)2(Cl)) (H2O)]. Cl. tu has been synthesized. • α-MnO2/TiO2 as a catalyst was performed using thermal decomposition of the complex. • The potential of the catalyst in the removal of Cd2+ was investigated. • The removal of Cd2+ reached a maximum value at pH 6 with 97% of adsorption capacity. A new weak ferrimagnet inorganic complex formulated as [Mn(Phen) 2 (Cl)) (H 2 O)]. Cl. Tu (complex 1), where phen = 1,10-phenanthroline and Tu= thiourea has been synthesized under sonochemical irradiation and fully characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential thermal analysis (DTA), vibration sample magnetometer (VSM), and single-single crystal X-ray diffraction (SCXRD). Complex 1 crystallizes in a triclinic system, space group Pī with unit cell parameters a = 9.8691(7) Å, b = 11.3619(7) Å, c = 12.8563(7) Å, β =86.007(5), and γ= 77.919(5) at 100 K. The coordination geometry around Mn (II) can be described as a slightly distorted octahedral. In the crystal packing of complex 1 many hydrogen bonds can be found between the non-coordinated chloride atoms and hydrogen atoms of coordinated water molecules. In the following, the sorbent of α-MnO 2 /TiO 2 was prepared by thermal decomposition of new inorganic precursor [Mn(Phen) 2 (Cl)) (H 2 O)]. Cl. Tu/TiO 2. The synthesized sorbent was characterized by FT-IR spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and N 2 adsorption-desorption analysis. Batch experiments were carried out at room temperature to study the main parameters such as pH, contact time, and sorbent dosage on the adsorption of Cd2+by α-MnO 2 /TiO 2. It was found that the adsorption of Cd2+ tends to increase with the increase of pH and reached a maximum value at 6 with 97% of adsorption capacity. A regeneration study revealed that α-MnO 2 /TiO 2 can be rapidly separated and repeatedly used for more than five cycles with removal efficiency >90%. [Display omitted] [ABSTRACT FROM AUTHOR]

• A new Co (II) complex has been synthesized by a sonochemical process. • The sorbent of Co 3 O 4 /SiO 2 has been prepared by calcination of inorganic complex, solvothermal and impregnation methods. • The synthesized sorbents were evaluated for the removal of MB from contaminated water. • The sorbent prepared through inorganic complex showed improved ability on adsorption of MB. • Superior activity by this sorbent can be attributed to its structural properties. A novel inorganic complex formulated as [Co(dipic)(2,2´-bipyridine) (H 2 O)] 3 × 10H 2 O, where dipic2− = pyridine-2,6-dicarboxylato has been synthesized via a facile sonochemical process. Molecular structure of inorganic complex was characterized by several methods. The results of single crystal X-ray diffraction (SCXRD) revealed that the complex crystallizes in space group P ī of a triclinic system. The sorbent of Co 3 O 4 /SiO 2 was prepared by thermal treatment of the silica supported complex at 500 °C. For comparative purposes, the sorbent of Co 3 O 4 /SiO 2 was prepared by solvothermal and impregnation methods. After characterization, the catalytic performance of the sorbents was comparatively studied for the removal of methylene blue (MB) from contaminated water source. The sorbent which prepared through thermal decomposition of inorganic complex showed improved ability in the removal of methylene blue due to the physicochemical properties, such as higher surface area, smaller particle size, and lower agglomeration. Image, graphical abstract [ABSTRACT FROM AUTHOR]

• A new complex of [Mg(phen)(H 2 O) 4 ]bdc. phen. H 2 O (1) has been synthesized. • Complex 1 crystallizes in a monoclinic structure with space group P 2 1 / n. • Sorbent of MgO/SiO 2 was prepared by thermal decomposition of complex 1. • The synthesized sorbent was applied for the tetracycline removal. • At 25°C with no NaCl, the synthetic catalyst shows the maximum removal of about 85.2%. A new organic-inorganic complex, [Mg(phen)(H 2 O) 4 ]bdc. phen. H 2 O (1) where phen = 1, 10-phenanthroline and bdc2- = isophthalato was synthesized by hydrothermal method. Complex 1 has been characterized by elemental analysis, thermal gravimetric analysis (TGA), differential thermal analysis (DTA) and single-crystal X-ray diffraction (SCXRD). The results of SCXRD analysis revealed that complex 1 crystallizes in space group P 2 1 / n of a monoclinic system. In the crystal packing of complex 1 there are high amounts of strong O–H···O and O–H···N hydrogen bonds, weaker C–H···O and C–H···π hydrogen bonds and π···π stacking interactions. The MgO/SiO 2 nanocomposite was successfully synthesized by thermal decomposition of complex 1 at 550°C. The Fourier-transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett –Teller (BET) specific surface area were used to characterize the structure and morphology of MgO/SiO 2 nanocomposite. The adsorption of tetracycline (TC) by nanocomposite of MgO/SiO 2 was studied and the influencing parameters including ionic strength, pH value, initial concentration of TC and temperature were investigated. It was found that the adsorption of TC onto MgO/SiO 2 is favorable and reaches a maximum value at pH of 6. The electrostatic interaction between TC molecule and the nanocomposite is probably the main adsorption mechanism. The current work shows that the nanocomposite of MgO/SiO 2 acts as a good case for the removal of TC due to high removal efficiency and excellent recycling capability. Image, graphical abstract [ABSTRACT FROM AUTHOR]

A new cyano-bridged, FeII–CeIV hetero-binuclear supra-complex formulated as [(FeII) 2 (CN) 6 (CeIV) 2 (CN) 6 (H 2 O) 3 ] n.nH 2 O (1), has been synthesized. Depending on the synthetic conditions, different morphology has been obtained. Using hydrothermal synthesis lead to a micro-structured of complex 1 (MS), while using ultrasonic irradiation resulted a nano-structured of complex 1 (NS). The synthesized complexes were characterized by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential thermal analysis (DTA) and scanning electron microscopy (SEM). The crystals of complex 1 have been fully characterized by single-crystal X-ray diffraction (SC-XRD), which revealed an orthorhombic system with space group Cmcm of expected composition. Also, the results of SEM show that the synthesized complexes have the different morphology and particle size. In the following, catalysts of Ce–Fe/SiO 2 - MS and Ce–Fe/SiO 2 - NS were prepared by thermal decomposition of MS and NS complexes, respectively, and characterized by FT-IR spectroscopy, SEM, powder X-ray diffraction (PXRD), and Brunauer–Emmett–Teller (BET) N 2 adsorption-desorption analysis. The catalytic activity of Ce–Fe/SiO 2 - MS and Ce–Fe/SiO 2 - NS was evaluated in the high-temperature water-gas shift reaction (HT-WGS) for hydrogen production. The high CO conversion (93 and 85.5%) was achieved by Ce–Fe/SiO 2 – NS , Ce–Fe/SiO 2 – MS , respectively, which can be mainly ascribed to physicochemical features of these catalysts, such as mesoporous nature, particle size, BET surface area and strong synergistic effects between the Ce and Fe in the Ce–Fe mixed oxides. Image 1 • A new supra-complex of FeII-CeIV has been synthesized. • The structure of complex 1 was studied by SC-XRD. • Catalysts of Ce-Fe/SiO2 were prepared by thermolysis of 1. • The catalysts were tested in the water-gas shift reaction. • The high CO conversion was achieved by the catalysts. [ABSTRACT FROM AUTHOR]

This study reports the structural and spectroscopic characterization of a novel metal organic compound formulated as [Fe (bpy)3] [Fe (dipic)2]2.7H2O (1) (dipic = pyridine‐2,6‐dicarboxylate and bpy = 2,2′‐bipyridine). 1 was investigated by elemental analysis, FT‐IR spectroscopy, powder X‐ray diffraction and single crystal X‐ray diffraction (SC‐XRD), which revealed a triclinic structure of expected composition. Thermal degradation of 1 was also investigated. Complex 1 was used as a precursor to prepare superparamagnetic nanoparticles of Fe3O4 by thermal analysis. The obtained Fe3O4 was characterized by Fourier transformed infrared spectroscopy (FT‐IR), powder X‐ray diffraction (XRD) and scanning electron microscopy (SEM). Fe3O4 nanoparticles were used as a nano‐adsorbent to remove Cd2+ from water at room temperature. The results showed that this nano‐adsorbent is effective in removing Cd2+ from contaminated water sources, and that the maximal effectivity of adsorption occurs at pH = 6. Magnetic measurements of complex 1 and Fe3O4 nanoparticles at room temperature revealed paramagnetic and superparamagnetic behavior, respectively. [ABSTRACT FROM AUTHOR]

This study reports the structural and spectroscopic characterization of a novel metal organic compound formulated as [Fe (bpy)3] [Fe (dipic)2]2.7H2O (1) (dipic = pyridine‐2,6‐dicarboxylate and bpy = 2,2′‐bipyridine). 1 was investigated by elemental analysis, FT‐IR spectroscopy, powder X‐ray diffraction and single crystal X‐ray diffraction (SC‐XRD), which revealed a triclinic structure of expected composition. Thermal degradation of 1 was also investigated. Complex 1 was used as a precursor to prepare superparamagnetic nanoparticles of Fe3O4 by thermal analysis. The obtained Fe3O4 was characterized by Fourier transformed infrared spectroscopy (FT‐IR), powder X‐ray diffraction (XRD) and scanning electron microscopy (SEM). Fe3O4 nanoparticles were used as a nano‐adsorbent to remove Cd2+ from water at room temperature. The results showed that this nano‐adsorbent is effective in removing Cd2+ from contaminated water sources, and that the maximal effectivity of adsorption occurs at pH = 6. Magnetic measurements of complex 1 and Fe3O4 nanoparticles at room temperature revealed paramagnetic and superparamagnetic behavior, respectively. [ABSTRACT FROM AUTHOR]