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This work discusses the synthesis and characterization of new copper Schiff‐base complex of 3,4‐diaminobenzophenone stabilized on magnetic MCM‐41 as a magnetically reusable catalyst. At first, Fe3O4 magnetic nanoparticles were synthesized via a chemical co‐precipitation method using FeCl2.6H2O and FeCl3.6H2O in basic solution of ammonia. Then magnetic MCM‐41 were synthesized via Fe3O4‐doped into mesoporous channels of MCM‐41. Further a new copper Schiff‐base complex of 3,4‐diaminobenzophenone was supported on magnetic MCM‐41 and was used as a practical and magnetically reusable catalyst in organic reactions such as homoselective synthesis of tetrazole and pyranopyrazole derivatives. This catalyst was characterized by several techniques such as scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDS), wavelength dispersive X‐ray spectroscopy (WDX), thermogravimetric analysis (TGA), X‐ray powder diffraction (XRD), atomic absorption spectroscopy (AAS), Fourier transform‐infrared spectroscopy (FT‐IR), Brunauer–Emmett–Teller (BET), and vibrating sample magnetomter (VSM). This catalyst display good selectivity, high activity, stability and facile magnetic separation. Therefore, this catalyst can be recycled for several times without significant loss of its catalytic efficiency.

The Response Surface Methodology (RSM) was employed for the optimization of the synthesis conditions of an anion exchange membrane. A novel chlorinated‐polypropylene heterogeneous anion exchange membrane was made via phase inversion. A nonionic surfactant was incorporated into the composition as an additive to enhance the membrane properties. The membrane performance was measured in terms of ion exchange capacity (IEC) and permselectivity. An experimental design was used to quantify the effects of variables including the ratio of resin/polymer, the ratio of additive/total solid, and the ratio of solvent/polymer, on IEC and permselectivity. For each function, a quadratic model was developed to correlate the relationship between variables and the response. The results demonstrated the accuracy of the two models. The anion exchange membrane with the best combination of a high IEC and high permselectivity was synthesized with a solvent/polymer ratio of 18.63 (v/w), resin/polymer ratio of 1 (w/w), and additive/total solid ratio of 0.02 (w/w). © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39888.