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Dual-responsive hydrogel composites, hydrocomposites (HC), composed of magnetite particles and alginate, which undergo drastic changes in volume in response to pH and magnetic fields, were prepared and employed for the removal of methylene blue (MB) from the aqueous environment. The use of magnets allowed for the control of the MB absorption mechanism and the removal of HCs following their application in water, thereby preventing secondary contamination. The HC capacity for water absorption was found to be dependent on the amount of magnetite and could be altered with the application of a magnetic field. In a 25 mg/L MB solution at pH 6.3 and 8, 20 mg of HC removed 97.7% of MB. The presence of 1% magnetite (w/w) is sufficient for composites to be guided by magnetic stimuli, and the resulting material could be reused at least four times through a simple treatment process. [ABSTRACT FROM AUTHOR]

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Abstract: A simple, efficient and green methodology for the C−S cross‐coupling reaction using Pd(L‐Pro)2 as a heterogeneous catalyst was developed involving aryl iodides, thiols, green‐solvent and a low catalytic loading of palladium prolinate. In addition, the catalyst turned out to be recyclable and the products were obtained in good to excellent yields. [ABSTRACT FROM AUTHOR]

An efficient method has been developed for the preparation of a-aminophosphonates by using zinc di(L-prolinate) as a catalyst under mild reaction conditions. The method has the advantages of high yields, short reaction times, and easy workup conditions. [ABSTRACT FROM AUTHOR]

An abstract of the article "Synthesis and characterization of the polyaniline dopant Schiff base" by Persiely P. Rosa, Mirian Y. Matsumoto, Keila B. Dias, Vicente L. Kupfer, Nelson L. C. Domingues, and Andrelson W. Rinaldi is presented.

An abstract of the article "Synthesis and characterization of nickel complexes derived from Schiff-Bases" by Mirian Y. Matsumoto, Keila B. Dias, Vicente L. Kupfer, Elias B. O. Filho, Larisse G. Salazar, Adalberto V. Mezacasa, Persiely P. Rosa and Andrelson W. Rinaldi is presented.