Reaction of [MoO2(acac)2] (where acac = acetylacetonate) with N’-(2-hydroxy-4-diethaylaminobenzylidene)-4-hydroxybenzohydrazide (H2L) in methanol afforded a methanol-coordinated mononuclear molybdenum(VI) oxo complex, [MoO2L(MeOH)]. Crystal and molecular structure of the complex were determined by single crystal X-ray diffraction method. The complex was further characterized by elemental analysis and FT-IR spectra. Single crystal X-ray structural studies indicate that the hydrazone ligand coordinates to the MoO2 core through enolate oxygen, phenolate oxygen and azomethine nitrogen. The Mo atom in the complex is in octahedral coordination. Thermal stability of the complex has also been studied. KEY WORDS: Molybdenum complex, Hydrazone ligand, Crystal structure, X-ray diffraction, Thermal property Bull. Chem. Soc. Ethiop. 2014, 28(3), 409-414.DOI: http://dx.doi.org/10.4314/bcse.v28i3.10
Huimin Huang,Yuandong Wu,Shuangsheng Cheng,Shaoguo Wen,Yi Qu,Thomas Doert,Dajiang Mei
A new bismuth(III) complex [(1,10-phen)Bi(C 2 O 4 ) 1.5 ], 1,10-phen = 1,10-phenanthroline, was synthesized with oxalate and phen ligands without by-products. The title complex was characterized by single crystal X-ray diffraction, FT-infrared Spectrum, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). 2D bismuth - oxalate - bridged layers are formed by oxalate ligands. Phen ligands are embedded in it which further stabilize the structure. The luminescence properties show that [(1,10-phen)Bi(C 2 O 4 ) 1.5 ] can emit blue-green fluorescence, and π - π stacking and ligand-to-metal-charge transfer (LMCT) are predominant in it, which may have potential applications in the fields of crystal luminescent materials.
Dan Li,Minghui Fan,Haobing Wang,Yongjie Zhu,Bole Yu,Pingyu Zhang,Huaiyi Huang
Sonodynamic therapy (SDT), as a novel non-invasive cancer treatment modality derived from photodynamic therapy (PDT), has drawn much attention due to its unique advantages for the treatment of deep tumors. Zinc-based complexes have shown great clinical prospect in PDT due to their excellent photodynamic activity and biosafety. However, their application in SDT has lagged seriously behind. Exploring efficient zinc-based complexes as sono-sensitizers remains an appealing but significantly challenging task. Herein, we develop a hydrazone ligand-based zinc complex (ZnAMTC) for SDT of tumors in vitro and in vivo. ZnAMTC was facilely synthesized via a two-step reaction from low-cost raw materials without tedious purification. It shows negligible dark toxicity and can produce singlet oxygen (1O2) under ultrasound (US) irradiation, exhibiting high sono-cytotoxicity to various cancer cells. Mechanism studies show that ZnAMTC can effectively reduce the levels of glutathione (GSH) and glutathione peroxidase 4 (GPX4) under US irradiation and later cause ferroptosis of cancer cells. In vivo studies further demonstrate that ZnAMTC exhibits efficient tumor growth inhibition under US irradiation and has good biosafety. This work provides useful insights into the design of first-row transition metal complexes for SDT application.
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