Abstract
The design and synthesis of structurally rich chemical materials for detection, analysis, and purification is challenging. In this regard, two functional 3d metal(II) complexes bearing the half-salamo-type compound HL1 (2-[O-(1-ethyloxyamide)]oxime-3‑methoxy-5‑bromo-phenol) have been synthesized, namely: [Cu2(L2)2]·2CH3CN (1) and [Co4(L2)4(CH3CH2OH)4] (2). Complexes 1 and 2 were fully characterized by single-crystal X-ray diffraction, elemental analysis, and FT-IR and UV–Vis spectroscopy. The crystal structure analysis revealed that complex 1 is a centrosymmetric oxo-bridged Cu(II) dimer formed by connecting two metalloligand [Cu(L2)] units. The coordination self-assembly in complex 2 was triggered to obtain a unique tetranuclear Co(II) cuboidal cluster of S4 symmetry based on a [Co(L2)] metalloligand unit. The experimental results showed that HL1 spontaneously catalyzes the formation of new compound H2L2 during the formation of complexes 1 and 2. The photocatalytic degradation properties of dimer 1 and cluster 2 were investigated for several dye pollutants: methyl orange (MO), methylene blue (MB), and Rhodamine B (RhB) under H2O2 initiation. Additionally, DFT calculations were performed to further understand the structure-property relationship between the electron characteristics and the photocatalytic degradation behaviors.
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