Five complexes with 6-methoxyquinoline have been synthesized; their structural, spectroscopic, photophysical and biological properties have been studied.
A new complex of Hg(II) with 6-methoxyquinoline (C 10 H 9 NO-6MQ) has been synthesized and characterized. The structure of the complex Hg(6MQ)Cl 2 was determined by single crystal X-ray diffraction. It crystallizes in the monoclinic space group P2 1 /c with a = 3.9139(3), b = 26.3400(2), c = 10.9090(9) Å, β = 89.833(6)°, V = 1124.6(1) Å 3 and Z = 4 molecules per unit cell. The coordination geometry of the mercury(II) center can be described as a distorted square pyramid formed by one nitrogen atom of the 6MQ and four chlorine atoms. Fourier transform infrared, Raman and UV/Vis spectroscopic studies have been carried out to characterize the compound, using theoretical calculations for the assignment of the experimentally observed bands. The thermal behavior was investigated by thermogravimetric analysis. The quantum yield of singlet molecular oxygen production Φ Δ was measured with steady-state methods in ethanol, using 9,10-dimethylanthracene (DMA) as actinometer and Bengal rose as reference photosensitizer. The resultant singlet molecular oxygen was detected indirectly by photooxidation reactions of DMA. The luminescence properties have also been studied.
Thevetia peruviana is an ornamental plant considered as a source of biological compounds with cardiac and antimicrobial activity. These compounds are normally extracted from different parts of in vivo plants. In this work, extracts were obtained from in vitro callus and plant cell suspension cultures of T. peruviana and their antimicrobial activity was evaluated by disk diffusion tests against gram negative (Salmonella thipimurium and Escherichia coli) and gram positive (Staphylococcus aureus and Bacillus cereus) strains. Ethanol, methanol and hexane extracts from callus and cell suspension cultures showed biological activity. Methanolic cell suspension extract showed activity against B. cereus and S. aureus. Ethanolic cell suspension extract inhibit all the bacteria, especially S. thipimurium while hexanic extract showed resistance activity against S. thipimurium, S. aureus and B. cereus. In terms of the source of the extracts, hexane extracts obtained from cell suspension cultures showed a higher antimicrobial activity than callus, while ethanol extracts had an inverse behavior. These results outline in vitro cell culture of T. peruviana as a feasible biotechnological platform for the production of compounds with antimicrobial activity.. KEYWORDS: Antimicrobial activity; callus culture; plant cell suspension culture; Thevetia peruviana. RESUMEN: Thevetia peruviana es una planta ornamental considerada fuente de compuestos biológicos con actividad cardiotónica y antimicrobiana extraídos normalmente de diferentes partes de la planta. En este trabajo se obtuvieron extractos a partir de cultivos de callos y suspensiones celulares de T. peruviana y se evaluó su actividad antimicrobiana mediante pruebas de difusión en disco contra cepas gram negativas (Salmonella thipimurium y Escherichia coli) y gram positivas (Staphylococcus aureus y Bacillus cereus). Los extractos de etanol, metanol y hexano de cultivos de callos y suspensiones celulares mostraron actividad biológica. El extracto de metanol de la suspensión celular mostró a Arias, J. P.; Ortega, I.; Peñuela, M. & Arias, M. (2018). Antimicrobial activity of callus and cell suspension cultures extracts of Thevetia peruviana. Rev. Fac. Cienc., 8(1), 45-56.
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