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21.
S. Neelakantan T. R. Rajagopalan T. R. Seshadri F.A.Sc. 《Proceedings Mathematical Sciences》1959,49(4):234-240
2-Methylanthraquinones with the 1∶4-dihydroxy system are conveniently prepared by the persulphate oxidation of the intermediate benzoylbenzoic acids and subsequent ring closure. 2-Methylquinizarin, islandicin and cynodontin have been prepared by this method as typical examples. 相似文献
22.
Theetharappan Murugan Neelakantan Mallanpillai Ananthakrishnan 《Journal of fluorescence》2021,31(5):1277-1290
Journal of Fluorescence - A water-soluble Schiff base, 2,3-bis((E)-(2-hydroxy-3-methoxybenzylidene)amino) propanoic acid (ODA) prepared by condensing o-vanillin and DL-2,3-diaminopropionic acid was... 相似文献
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Journal of Solid State Electrochemistry - In this short communication, we study the electrochemical behavior of an individual Al2Cu intermetallic phase (coexisting with α-Al) in 0.1 M... 相似文献
24.
Neelakantan MA Marriappan SS Dharmaraja J Jeyakumar T Muthukumaran K 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,71(2):628-635
Metal complexes of o-vanillidene-2-aminobenzothiazole have been prepared and characterized by elemental and spectral (vibrational, electronic, 1H NMR and EPR) data as well as magnetic susceptibility measurements and thermo gravimetric analysis (TG/DTA). The low molar conductance values reveal the non-electrolytic nature of these complexes. The elemental analysis suggests that the stoichiometry to be 1:2 (metal:ligand). Magnetic susceptibility data coupled with electronic spectra suggest that two ligands coordinate to each metal atom by phenolic oxygen and imino nitrogen to form high spin octahedral complex with Co(II), Mn(II) and Ni(II). The fifth and sixth position of metal ion is satisfied with water molecules. The thermal behaviour (TG/DTA) of the synthesised complexes shows that the complexes loss water molecules in the first step followed by decomposition of the ligand. Spin Hamiltonian parameters predict a distorted tetrahedral geometry for the copper complex. XRD and SEM analysis provide the crystalline nature and the morphology of the metal complexes. The in vitro biological activity of the metal chelates is tested against the Gram positive bacteria (Bacillus amyloliquifacians) and gram negative bacteria (Pseudomonas species), fungus (Aspergillus niger) and yeast (Sacchromyces cereviaceae). Most of the metal chelates exhibited higher biological activities. 相似文献
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The infra-red and Raman spectra of ordinary and deuterated barium chloride dihydrate have been studied to throw light on the intramolecular hydrogen bonds in these two crystals. The frequencies of the stretching, bending and librational modes observed in infra-red and Raman spectra exclude the possibility of at least one of the OH.... Cl hydrogen bonds, contrary to the results of NMR and neutron diffraction studies. 相似文献
27.
Jose Priya Parvathi Ameena Kala M. S. Kalarikkal Nandakumar Thomas Sabu 《Research on Chemical Intermediates》2018,44(9):5597-5621
Research on Chemical Intermediates - Dye effluents play a major role in polluting water bodies, and various treatment technologies are being used for their removal. Among these methods, green... 相似文献
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Interaction of Amino Acid Schiff Base Metal Complexes with DNA/BSA Protein and Antibacterial Activity: Spectral Studies,DFT Calculations and Molecular Docking Simulations
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Cu(II), Ni(II) and Zn(II) complexes of (E)‐2‐((2,4‐dihydroxybenzylidene)amino)‐3‐(1H‐indol‐3‐yl)propanoic acid Schiff base ( L ) were synthesized and characterized by various spectral methods. ESI‐MS was used to confirm the structure of synthesized compounds. Molecular geometries of the complexes were predicted by optimizing the structure by DFT/B3LYP method with LANL2DZ basis set in the gas phase. The interaction of the metal complexes with CT‐DNA and BSA protein has been examined by UV‐vis, fluorescence and viscometer titrations reveal that the complexes bind to DNA through intercalation binding mode. The copper complexes exhibit effective cleavage of pUC19 DNA by the oxidative mechanism. The synthesized compounds screened for their antibacterial activities against various bacteria strains exhibit the L and copper complex show potential activity against Pseudomonas aeruginosa and Escherichia coli, respectively. Subsequently, molecular docking studies were performed on to understand the binding of the compounds with DNA, BSA and bacteria. 相似文献
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