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Mohammad Hassan Loghmani,Abdollah Fallah Shojaie,Seyyedeh Azadeh Hosseini 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.96 No.-
In this study, Glutathione-responsive hydrogel, MIPs and their related NIPs were synthesized byprecipitation polymerization method. Effect of HEMA/MAA and EGDMA/TRIM as functional monomerand crosslinking agents on size, morphology, drug loading and releasing were studied. BACy as a disulfidecross-linking agent was used in praparation of Glutathione-responsive hydrogel. The size andmorphology of MIPs and NIPs were examined by FE-SEM technique. Results showed EGDMAsynthesizedMIPs had the smaller size than TRIM-prepared MIPs. In order to measure the capacity of MIPsor NIPs for binding to cisplatin, static and dynamic adsorption experiments were done. The amounts ofcisplatin were measured by HPLC method. The binding capacity of drug by MIPs is observed to be higherthan NIPs. The EGDMA-synthesized polymers showed a high percentage of adsorption. NIPs weresaturated much sooner than MIPs. In vitro release assays of cisplatin were done in PBS at pH = 7.4 andtemperature of 37 C. The results showed that increase of the amount of GSH cause to increase release ofthe drug from hydrogel.
Abdollah Fallah Shojaei,Mohammad Hassan Loghmani 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.12
Anatase nanocrystalline and its tungsten-doped (0.4, 2, and 4 mol %) powders have been synthesized by microwave irradiation through hydrolysis of titanium tetra-isopropoxide (TIP) in aqueous solution. The materials are characterized by XRD, Raman, SEM-EDX, TEM, FT-IR and UV-vis techniques. The nanocrystalline TiO2 particles are 30 nm in nature and doping of tungsten ion decreases their size. As seen in TEM images, the crystallites of W (4 mol %) doped TiO2 are small with a size of about 10 nm. The photocatalytic activity was tested on the degradation of 4-nitrophenol (4-NP). Catalytic activities of W-doped and pure TiO2 were also compared. The results show that the photocatalytic activity of the W-doped TiO2 photocatalyst is much higher than that of pure TiO2. Degradation decreases from 96 to 50%, during 115 min, when the initial 4-NP concentration increases from 10 to120 ppm. Maximum degradation was obtained at 35 mg of photocatalyst.
Shojaei, Abdollah Fallah,Loghmani, Mohammad Hassan Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.12
Anatase nanocrystalline and its tungsten-doped (0.4, 2, and 4 mol %) powders have been synthesized by microwave irradiation through hydrolysis of titanium tetra-isopropoxide (TIP) in aqueous solution. The materials are characterized by XRD, Raman, SEM-EDX, TEM, FT-IR and UV-vis techniques. The nanocrystalline $TiO_2$ particles are 30 nm in nature and doping of tungsten ion decreases their size. As seen in TEM images, the crystallites of W (4 mol %) doped $TiO_2$ are small with a size of about 10 nm. The photocatalytic activity was tested on the degradation of 4-nitrophenol (4-NP). Catalytic activities of W-doped and pure $TiO_2$ were also compared. The results show that the photocatalytic activity of the W-doped $TiO_2$ photocatalyst is much higher than that of pure $TiO_2$. Degradation decreases from 96 to 50%, during 115 min, when the initial 4-NP concentration increases from 10 to 120 ppm. Maximum degradation was obtained at 35 mg of photocatalyst.
Shojaei, Abdollah Fallah,Rafie, Mahboubeh Delavar,Loghmani, Mohammad Hassan Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.8
Cr(III) and Co(III) complexes with acetylacetonate were anchored onto a mesoporous MCM-41 through Schiff condensation. The materials were characterized by XRD, FT-IR, BET, CHN and ICP techniques. Elemental analysis of samples revealed that one C=N bond was formed through Schiff condensation on MCM-41 surface. The catalysts were tested for the alcohol oxidations using t-butyl hydroperoxide (TBHP) and $H_2O_2$ as oxidant. The catalytic experiments were carried out at both room temperature and reflux condition. Various solvents such as dichloromethane, acetonitrile and water were examined in the oxidation of alcohols. Among the different solvents, catalytic activity is found more in acetonitrile. Further, the catalysts were recycled three times in the oxidation of alcohols and no major change in the conversion and selectivity is observed, which shows that the immobilized metal-acetylacetonate complexes are stable under the present reaction conditions.
Abdollah Fallah Shojaei,Mahboubeh Delavar Rafie,Mohammad Hassan Loghmani 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.8
Cr(III) and Co(III) complexes with acetylacetonate were anchored onto a mesoporous MCM-41 through Schiff condensation. The materials were characterized by XRD, FT-IR, BET, CHN and ICP techniques. Elemental analysis of samples revealed that one C=N bond was formed through Schiff condensation on MCM-41 surface. The catalysts were tested for the alcohol oxidations using t-butyl hydroperoxide (TBHP) and H2O2 as oxidant. The catalytic experiments were carried out at both room temperature and reflux condition. Various solvents such as dichloromethane, acetonitrile and water were examined in the oxidation of alcohols. Among the different solvents, catalytic activity is found more in acetonitrile. Further, the catalysts were recycled three times in the oxidation of alcohols and no major change in the conversion and selectivity is observed, which shows that the immobilized metal- acetylacetonate complexes are stable under the present reaction conditions.