A novel trimeric Zn (II) complex based on 8-hydroxyquinoline with trifluoromethylbenzene group: Synthesis, crystal structure, photophysical properties and DNA binding

作者：Huo, Yanping^*; Wang, Chunquan; Lu, Jiguo; Hu, Sheng; Li, Xiaoyang; Zhang, Li

来源：Journal of Molecular Structure, 2015, 1098: 311-317.

DOI：10.1016/j.molstruc.2015.06.026

• 8-Hydroxyquinoline
• Trimeric zinc complex
• Crystal structure
• Photophysical property

A novel 2-substituted-8-hydroxyquinoline ligand (E)-2-[2-(4-trifluoromethylphenyl)ethenyl]-8-hydroxyquinoline (3, HL) was synthesized and characterized by ESI-MS, NMR spectroscopy and elemental analysis. Using solvothermal method, a trimeric complex [Zn3L6] (4) was fabricated by self-assembly of Zn(II) ions with 3. X-ray structural analysis shows that 4 exhibits a trinuclear core, which was bridged and encapsulated by six 8-hydroxyquinolinate-based ligands. The supramolecular structure of 4 features a lamellar solid constructed by aromatic stacking interactions and nonclassical C-H center dot center dot center dot F hydrogen bonds derived from 4-trifluoromethylphenyl group of the 3. The coordination behavior of zinc salt and 3 in solution was performed by H-1 NMR, UV-vis and Photoluminescence (PL). The experimental results show that the complex 4 emits yellow luminescence in the solid state. To investigate its properties further, we also studied the thermal stability, photophysical properties (fluorescent emission, lifetime) of complex 4, and the interactions between 4 and C-60 or EtBr-DNA system.

• 出版日期2015-10-15
• 单位中国科学院; 广东工业大学