http://nopr.niscpr.res.in/handle/123456789/58514 Sat, 10 Oct 2026 15:17:37 GMT 2026-10-10T15:17:37Z http://nopr.niscpr.res.in/handle/123456789/58519 Title: Synthesis, crystal structure, luminescent, and photocatalytic properties of a uranyl(VI)-organic framework based on tripodal flexible zwitterionic ligand Authors: Meng, Yuning; Niu, Fei; Zhang, Xiaolin; Liu, Donghui; Lan, Qiaofa; Yang, Youming Abstract: The uranyl-organic framework based tripodal flexible zwitterion ligand 1,1',1''-[benzene-1,3,5-triyltris(methylene)] tris(pyridine-4-carboxylic acid) tribromine (H3LBr3), [(UO2)2(μ3-O)(μ2-OH)L]NO3·nH2O (n ≈ 5) (1) has been synthesized under hydrothermal condition and characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, and UV-visible spectroscopy. Compound 1 contains a tetra-uranyl oxo-cluster, which displays a microporous 3D structure. The fluorescence measurement shows that 1 exhibits strong luminescence. Furthermore, 1 shows good photocatalytic activity for the degradation of methylene blue. Page(s): 1409-1415 Mon, 01 Nov 2021 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/58519 2021-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/58518 Title: Microwave synthesis, characterization and biological activities of transition metal complexes with novel SNSN donor Schiff base ligand Authors: Devi, P R Sagunthala; David, S Theodore; Joel, C; Bennie, R Biju; Abraham, S Daniel Abstract: A novel Schiff base (E)-N-(pyridine-2-yl)thiophen-2-ylmethylene)hydrazine carbothioamide (L), has been synthesised by the condensation of thiophen-2-carbaldehyde and 4-(pyridin-2-yl)-thiosemicarbazide, using solvent free microwave synthesis. The Co(II), Ni(II), Cu(II) and Zn(II) complexes of the Schiff base are also prepared. They are characterised by elemental analysis, EI-mass spectrum, 1H &13C-NMR spectrum, FTIR, UV-vis spectra, magnetic, EPR spectra and thermal analysis. The “SNSN” donor ligand binds the metal ion in tetradentate mode through thiophenyl and thioenolic sulphur atoms and imino and pyridine nitrogen atoms. The electronic spectra along with magnetic measurements demonstrate tetrahedral geometry for Co(II), Ni(II) and Zn(II) complexes, and square planar geometry for Cu(II) complex. All the complexes are found to be thermally stable from thermogravimetric studies. The complexes show enhanced antibacterial activity than the ligand against various bacterial strains. The BSA binding activity of the complexes shows that the affinity for binding is greater towards copper complex. The cytotoxicity of the ligand and its complexes are tested on HT29 colon cancer cells using MTT assay. Page(s): 1416-1426 Mon, 01 Nov 2021 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/58518 2021-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/58517 Title: Synthesis, characterization, biological activities of Schiff base metal(II) complexes derived from 4-hydroxy-3,5-dimethoxybenzaldehyde and 3-aminoquinoline Authors: Karthik, Somasundaram; Gomathi, Thulasimani; Vedanayaki, Subramaniam Abstract: A new Schiff base ligand (E)-2,6-dimethoxy-4-((quinolin-3-ylimino)methyl)phenol (HL) and its Cu(II), Co(II), Ni(II) and Zn(II) metal complexes have been synthesized and characterized by various spectroscopic (UV-visible, IR, NMR and mass), SEM and magnetic susceptibility measurement. The ligand (HL) have been synthesized by condensation of 4-hydroxy-3,5-dimethoxybenzaldehyde and 3-aminoquinoline. Based on electronic spectral data and magnetic susceptibility measurement the tetrahedral geometry is proposed for all the complexes. The ligand and metal complexes are screened for their antimicrobial activities against bacteria (Staphylococcus aureus, Escherichia coli) and antifungal activity against the fungi (Candida albicans). Further, the ligand and its Cu(II) complex are also screened for anticancer activity on human breast (MCF7) cancer cell lines by the MTT assay method. Interestingly, Cu(II) complex shows better anticancer activity than the free Schiff base ligand. The in vitro anti-inflammatory and anti-diabetic activities of the ligand and Cu(II) complex are studied. The Cu(II) complex show higher inhibition activity than that of the free ligand. Page(s): 1427-1436 Mon, 01 Nov 2021 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/58517 2021-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/58516 Title: Novel Co(II) metal complexes of N, O donor salicyloylpyrazoleoxime Schiff bases: synthesis, spectroscopic studies and antimicrobial evaluation Authors: Dhokale, N T; Nagawade, A V Abstract: Five novel mononuclear Co(II) chelate complexes derived from salicyloylpyrazoleoximes have been synthesized and characterized using elemental analysis, spectroscopic methods (UV-visible, IR, 1H NMR) and thermal analysis. The elemental analysis suggests that the Schiff Base Co(II) complexes have 1:2 stoichiometry. The spectroscopic determination suggest the complexes are square planer and the Schiff base coordinate to Co(II) metal through imine nitrogen and phenolic oxygen. All synthesized complexes are stable, non-hygroscopic, non-electrolytic and amorphous in nature. Most of the ligands and Co(II) complexes possess moderate antimicrobial activity against the test bacteria. Page(s): 1437-1442 Mon, 01 Nov 2021 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/58516 2021-11-01T00:00:00Z