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This work investigated the design and conversion of a research-based comprehensive chemistry experiment in laboratory. The preparation and characterization of carboxylate vanadyl complex is a routine synthetic method in the scientific research on bio-inorganic chemistry. Through the study and optimization all the steps of the experiment which uses the aromatic carboxylic acid to react with the vanadium raw materials, the best experiment conditions, the most efective handling methods and the appropriate reaction time were obtained. The experiment could satisfy the requirements of the stability and reproducibility in teaching experiment. And the carboxylate vanadyl complex products were characterized by the infra-red spectrum (IR) and thermogravimetric analysis (TGA). Through this comprehensive experiment, the students could consolidate the principle of complex preparation, understand and grasp the working principle and operation skiil of the rotary evaporator, microwave oven, infrared spectroscopy and thermogravimetric analyzer, and develop their comprehensive ability including the related chemical basic knowledge, experimental operation, instrument analysis and relevant scientific literacy and research ability. [ABSTRACT FROM AUTHOR]

Abstract The first new carboxylate complex [Cu 4 (SMIA) 6 (phen) 4 ](ClO 4) 2 (1) (SMIA− = Syn-2-Methoxyimino-2-(2-Furyl)-Acetate, phen = phenanthroline) with a rarely puckered-belt tetranuclear skeleton has been synthesized and characterized by EA, FT-IR, UV and X-ray crystallography. Complex 1 is consists of two independent binuclear copper units Cu 2 (SMIA) 3 (phen) 2 with two different coordination geometric Cu2+ centers bridged by two tridentate carboxylates. The π-π stacking force and C H⋯O hydrogen bonds are involved in the formation of weak intermolecular forces. Studies on the direct-current (dc) and alternating-current (ac) magnetic susceptibilities of 1 demonstrate that the magnetic coupling interactions between Cu2+ centers are overall antiferromagnetic and the compound has the spin glassy behavior. Under the UV light irradiation, the title complex displays high photocatalytic activity for the degradation of methyl orange (MO) and rhodamine B (RB), which is the simulants of organic pollutants in water. Graphical abstract A tetranuclear Cu(II) complex with a new flexible carboxylate was developed successfully and evaluated for its photocatalytic and magnetism properties. Unlabelled Image Highlights • SMIA− (Syn-2-Methoxyimino-2-(2-Furyl)-Acetate) has never been used to synthesize metal complexes. • The first example of the tetranuclear copper complex with SMIA− has a rare puckered-belt structure skeleton. • The copper(II) complex has a good photocatalytic activity for degradation organic pollutant. [ABSTRACT FROM AUTHOR]