Volatile phenols in the wastewater provide a basic parameter of the pollution. Spectrophotometric method based on the reactions of the individual phenols with 4-aminoantipyrine in the presence of an oxidizing agent is the current official analytical method in many countries. In this paper, we propose a method for extracting the resultant colored dye with ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate instead of chloroform. The results revealed excellent extraction efficiency, and the used ionic liquid could be regenerated easily. The method with small volume green reagent could be potentially applied in portable devices for in situ environmental analysis.

Perfluoroalkylation of N-alkylhydrazones has been achieved via visible light mediated photoredox reactions between the hydrazone and perfluoroalkyl iodide (RI). This protocol provides a convenient and efficient access to a series of perfluoroalkylated aromatic aldehyde hydrazones which tolerates a wide range of functional groups on the aromatic ring, and allows the use different types of primary and secondary perfluoroalkyl iodides with up to eight carbon atoms. Furthermore, aliphatic aldehyde hydrazones and N-monosubstituted hydrazones which are unreactive in previously reported hydrazone perfluoroalkylation reactions now take part in the reaction under our reaction conditions to give a satisfactory yield of products. Stern-Volmer quenching studies and spin-trapping experiments indicated that these reactions proceed by free radical addition of the R radical to the azomethine atom followed by one electron oxidation of the hydrazyl radical and deprotonation of the diazenium cation.

A novel graphene-based solid acid was successfully prepared through loading Co and Ni onto the surface of reduced graphene nanosheets with hydrothermal method. After sulfonation of the as-synthesized reduced graphene oxide (rGO)-Ni-Co composites, a kind of solid acid was prepared for reducing p-Nitrophenol (PNP) into p-Aminophenol (PAP). The result shows that the sulfonated rGO-Ni-Co composites have better catalytic ability than rGO-Ni-Co composites. These findings may provide a facile method to prepare solid acid which consists of rGO and metal ion for its application in catalysis fields.

INTRODUCTION Organic complexes of rare earth luminescent materials are interdiscipline of inorganic luminescent, organic lightemitting and bioluminescence. It has important theoretical significance and practical application value 1,2. The luminescence properties of rare earth metal complexes are based on their transition between the 4f energy levels, which become a huge luminous treasure. These complexes provide a great number of high-tech light-emitting materials and laser materials of superior performance 3-5. Rare earth organic complexes attract more and more attention due to their high luminescene intensity, high colour purity, high stability and other unique advantages, which widely used in industry, agriculture, medicine and other hightech industries.These applied researches promote the development of basic subjects and also have great significance on national economy development and high-tech industries 6,7. Aromatic imide, especially phthalimide and its derivatives are important organic intermediates, which have been widely applied in pesticide, medicine, dyestuff, brightener, photocatalysis and other industries 8. EXPERIMENTAL Material preparation: Phthalimide (C 8 H 5 NO 2), europium oxide (Eu 2 O 3) and phenanthroline (abbreviated Phen)were

Graphene-supported Palladium composites were prepared through irradiation of the mixture of K2C2O4, Pd and graphene oxide (GO) with UV light in the presence of ethylene glycol (EG). Since the two-dimensional sheet of GO has a huge surface area, the as-synthesized graphene supported Pd composites kept excellent catalytic activity. There is no reduction agents that were used in the process of synthesis of graphene supported Pd composites. The good yield of cinnamic acid could be obtained when using the as-synthesized graphene-supported Pd composites as a catalyst in the reaction of iodobenzene, acrylic acid and triethylamine in the water system. Furthermore, no obvious mass loss of catalyst could be observed when being used to catalyze the heck reaction multiple times.