4.6 Article

Thallium(I) Tropolonates: Synthesis, Structure, Spectral Characteristics, and Antimicrobial Activity Compared to Lead(II) and Bismuth(III) Analogues

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MOLECULES
卷 27, 期 1, 页码 -

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MDPI
DOI: 10.3390/molecules27010183

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thallium(I) triflate; thallium(I) complexes; tropolone; 5-methyltropolone; hinokitiol; crystal structure; antimicrobial activity

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The characteristics and antimicrobial activity of a series of thallium(I) compounds were investigated, and it was found that only bismuth(III) complexes showed significant antimicrobial activity.
Synthesis, single-crystal X-ray determination diffraction and FT-IR, NMR (H-1, C-13, F-19 and Tl-205), UV-vis, and luminescence spectra characteristics were described for series of thallium(I) compounds: thallium(I) triflate (Tl(OTf)), 1:1 co-crystals of thallium(I) triflate and tropolone (Htrop), Tl(OTf)center dot Htrop, as well as simple thallium(I) chelates: Tl(trop) (1), Tl(5-metrop) (2), Tl(hino) (3), with Htrop, 5-methyltropolone (5-meHtrop), 4-isopropyltropolone (hinokitiol, Hhino), respectively, and additionally more complex {Tl@[Tl(hino)](6)}(OTf) (4) compound. Comparison of their antimicrobial activity with selected lead(II) and bismuth(III) analogs and free ligands showed that only bismuth(III) complexes demonstrated significant antimicrobial activity, from two- to fivefold larger than the free ligands.

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