Tertiary anilines can be prompted to react with N‐aryl‐ and N‐benzylmaleimides to form tetrahydroquinoline products under photocatalysis using visible light irradiation, the ruthenium or iridium complexes Ru(bpy)3Cl2 or Ir(ppy)2(dtbbpy)PF6 as catalyst, and air as terminal oxidant.

A magnetic hierarchical core–shell structured Fe3O4@PDA‐Pd@[Cu3(btc)2] nanocomposite has been fabricated via a facile layer‐by‐layer assembly method. It contains a core of polydopamine (PDA)‐modified magnetic Fe3O4 nanoparticles (NPs), a transition layer of Pd NPs, and a porous outer shell of copper‐based metal–organic framework (MOF) with controllable thickness. This novel nanocomposite was characterized by TEM, FTIR, XRD, XPS, N2 adsorption–desorption isotherms, and VSM. The prepared Fe3O4@PDA‐Pd@[Cu3(btc)2] (n=5) nanocomposite shows ultrahigh catalytic activity for the 4‐nitrophenol reduction and Suzuki–Miyaura coupling reactions of aryl halides (Br, Cl) with arylboronic acids. Moreover, the nanocomposite also can be easily separated by an external magnet and reused at least 8 runs with excellent yields for both the reactions. The catalyst has outstanding catalytic performance, mainly because the integration of [Cu3(btc)2] with Fe3O4@PDA‐Pd that combines the advantages of each component could exhibit a synergistic effect in the catalytic system.

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A novel type of porous oil-absorbent microspheres based on poly(stearyl methacrylate-co-butyl acrylate) was prepared via suspension polymerization. By investigating the effects of the cross-linking agent, monomer ratio, initiator, stabilizer, water/oil ratio, and porogen agent on the oil absorbency of the prepared oil-absorbents, an optimized oil-absorbent microsphere OAM-T was obtained, and characterized by FT-IR and SEM. The oil absorbencies of OAM-T toward chloroform, toluene, gasoline, and diesel were measured to be 61.9, 32.6, 28.8, and 28.2 g/g respectively, with oil absorption saturation time being 1.0, 1.5, 2.0, and 3.0 hr. The oil retention of OAM-T toward the four oils is all above 95%. Besides in pure oils, OAM-T also has high oil absorbencies in oil-water mixture. It can be reused at least 12 times with little change in oil absorbency. Owing to its excellent oil absorption performance, OAM-T might find applications for removing oil spills and organic pollutants from water.

A novel heterogeneous Pd catalyst was synthesized by anchoring palladium(II) onto poly(undecylenic acid-co-N-isopropylacrylamide-co-potassium 4-acryloxyoylpyridine-2,6-dicarboxylate)-coated Fe 3 O 4

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Summary: The effect of salts on the conformational behavior of acenaphthylene labeled poly(N,N‐diethylacrylamide) (PDEA/ACE) has been investigated in dilute aqueous solution using UV‐vis and fluorescence spectroscopy. It is demonstrated here that the effectiveness of various salts in changing the lower critical solution temperature (TLCS) of the PDEA/ACE solution followed the Hoffmeister series. The addition of NaCl linearly lowered the TLCS. In dilute aqueous solution, the PDEA/ACE adopted a loose coil conformation below its TLCS. The PDEA/ACE adopted a compact globule conformation above the temperature at which the coil to globule transition (CGT) was completed. A fluorescence anisotropy investigation suggested that a molten globule conformation existed during the CGT of the PDEA/ACE solution. In all of the above three conformations, the PDEA/ACE was more compact in the presence of NaCl than in the absence of any salt.