Synthesis and theoretical study of 5-methoxyisatin-3-(N-cyclohexyl)thiosemicarbazone and its Ni(II) and Zn(II) complexes
摘要:
5-Methoxyisatin-3-(N-cyclohexyl)thiosemicarbazone (H2MICT) and its Zn(II) and Ni(II) complexes have been synthesized and characterized using IR, H-1 NMR, C-13-NMR, MS, UV and elemental analysis. (H2MICT) ligand has been characterized with X-ray diffraction method also The possible structures and IR data of the studied molecules were Calculated and compared with experimental results using B3LYP/6-31G(d,p) and B3LYP/LANL2DZ methods. (C) 2009 Elsevier B.V. All rights reserved.
Synthesis and characterisations of copper(II) complexes of 5-methoxyisatin thiosemicarbazones: Effect of N-terminal substitution on DNA/protein binding and biological activities
摘要:
The newly synthesized ligands (HL1-HL3) of 5-methoxyisatin thiosemicarbazone with different N-terminal substituents and their copper(II) complexes 1-3 respectively were exposed to spectral and structural characterization. The spectral studies reveal that the ligands show a tridentate mode of binding (ONS donor) with Cu (II) to form square planar complexes. The crystal structure of the ligand HL1 and complex 1 were confirmed by single crystal XRD. The compounds were subjected to DNA/BSA interaction studies using electronic and fluorescence spectroscopic techniques. The binding studies showed that, the complexes (1-3) were able to bind with DNA/BSA macromolecules with good binding constant. In which 1 (K-b = 0.83 x 10(5) M-1) shows good interaction with the DNA while 3 shows better interaction with BSA (K-b = 2.4 x 10(5) M-1). The complexes (1-3) were also tested for antimicrobial activity, radical scavenging activity and in vitro anti-proliferative activity. Complex 3 have shown potent efficacy with broad spectrum antimicrobial activity against the microorganisms, whereas the complex 1 has shown decent scavenging properties compared to the reference drug (ascorbic acid) with an IC50 value of 19.23 +/- 1.05 mu M. Further the, anti-proliferative activity study revealed that, the complex 1 has exhibited broad spectrum activity against MCF-7, A549 and HeLa with IC50 values 14.83 +/- 0.45 mu M, 17.88 +/- 0.16 mu M and 6.89 +/- 0.42 mu M, respectively compared to standard drug Doxorubicin.
Synthesis and characterisations of copper(II) complexes of 5-methoxyisatin thiosemicarbazones: Effect of N-terminal substitution on DNA/protein binding and biological activities
The newly synthesized ligands (HL1-HL3) of 5-methoxyisatin thiosemicarbazone with different N-terminal substituents and their copper(II) complexes 1-3 respectively were exposed to spectral and structural characterization. The spectral studies reveal that the ligands show a tridentate mode of binding (ONS donor) with Cu (II) to form square planar complexes. The crystal structure of the ligand HL1 and complex 1 were confirmed by single crystal XRD. The compounds were subjected to DNA/BSA interaction studies using electronic and fluorescence spectroscopic techniques. The binding studies showed that, the complexes (1-3) were able to bind with DNA/BSA macromolecules with good binding constant. In which 1 (K-b = 0.83 x 10(5) M-1) shows good interaction with the DNA while 3 shows better interaction with BSA (K-b = 2.4 x 10(5) M-1). The complexes (1-3) were also tested for antimicrobial activity, radical scavenging activity and in vitro anti-proliferative activity. Complex 3 have shown potent efficacy with broad spectrum antimicrobial activity against the microorganisms, whereas the complex 1 has shown decent scavenging properties compared to the reference drug (ascorbic acid) with an IC50 value of 19.23 +/- 1.05 mu M. Further the, anti-proliferative activity study revealed that, the complex 1 has exhibited broad spectrum activity against MCF-7, A549 and HeLa with IC50 values 14.83 +/- 0.45 mu M, 17.88 +/- 0.16 mu M and 6.89 +/- 0.42 mu M, respectively compared to standard drug Doxorubicin.
Synthesis and theoretical study of 5-methoxyisatin-3-(N-cyclohexyl)thiosemicarbazone and its Ni(II) and Zn(II) complexes
5-Methoxyisatin-3-(N-cyclohexyl)thiosemicarbazone (H2MICT) and its Zn(II) and Ni(II) complexes have been synthesized and characterized using IR, H-1 NMR, C-13-NMR, MS, UV and elemental analysis. (H2MICT) ligand has been characterized with X-ray diffraction method also The possible structures and IR data of the studied molecules were Calculated and compared with experimental results using B3LYP/6-31G(d,p) and B3LYP/LANL2DZ methods. (C) 2009 Elsevier B.V. All rights reserved.