Synthesis, crystal structure and physicochemical characterization of a Hg(II) complex with 6-methoxyquinoline as ligand

Abstract

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.

Crystal structure, physicochemical properties, Hirshfeld surface analysis and antibacterial activity assays of transition metal complexes of 6-methoxyquinoline

“…6-Metoxiquinoline (6-MeOQ) can be found in the chemical structure of several antimalarial drugs 1 . This compound has been extensively studied regarding its photochemical behavior, and noteworthy singlet oxygen and fluorescence quantum yields have been reported [2][3][4][5][6] . Therefore, complexation of 6-MeOQ with transition metals could improve its photophysical properties and enhance its stability.…”

“…Therefore, complexation of 6-MeOQ with transition metals could improve its photophysical properties and enhance its stability. However, only some coordination compounds with this ligand have been reported 3,7,8 . The spectroscopic and thermogravimetric properties of Co(II), Cu(II) and Zn(II) complexes were previously discussed, but their crystal structures were not determined 7 .…”

“…The spectroscopic and thermogravimetric properties of Co(II), Cu(II) and Zn(II) complexes were previously discussed, but their crystal structures were not determined 7 . As part of our ongoing research, we have reported the crystal structure and the physicochemical characterization of a Hg(II) compound 3 and a Co(II) ternary complex 8 with 6-MeOQ as ligand. Magnetic susceptibility measurements for the Co(II) complex have shown that it displays relaxation of the magnetization below a temperature of 9 K behaving as a SIM (single ion magnet).…”

Single‐Ion Magnets Based on Mononuclear Cobalt(II) Complexes with Sulfadiazine

“…Moreover, Cu II , Ni II , Zn II , and Hg II complexes with 6‐methoxyquinoline (6MQ) as ligand were reported, but only the crystal structure of the compound containing mercury was discussed . With the aim of expanding the previously mentioned studies and to investigate the effect of different coordination geometries on the magnetic properties of Co II compounds, two ternary complexes of Co II with SDZ and 2,2′‐bipyridine (bpy) or 6MQ as ligands have been prepared, [Co(SDZ) 2 bpy] ( 1 ) and [Co(SDZ) 2 (6MQ) 2 ] ( 2 ).…”

Screening de metalofármacos derivados de N-heterociclos y metales de transición en cultivos celulares 2D y 3D según sus efectos antitumorales

“…Estudios de la actividad antibacterial de los complejos de 6-metoxiquinolina con cobalto (II), níquel (II), cobre (II), zinc (II), plata (I) y mercurio (II) han sido previamente publicados por Villa-Pérez y colaboradores [213,305] Estabilidad en solución de los complejos derivados de 6-metoxiquinolina La estabilidad acuosa de soluciones 1x10 -5 M fue determinada en buffer fosfato pH 7.4 para los cuatro complejos, midiendo su espectro electrónico en el rango de 200 a 400 nm durante 24 horas. Se analizó el área bajo la curva de cada espectro y se comparó con el área obtenida en el tiempo cero.…”