The interaction of 5,10,15, 20-tetrakis(N-methylpyridinium-4-yl)porphyrin (T4MPyP(4+)) with the oligonucleotide DNA duplex [d(GCACGTGC)](2) was studied by two-dimensional (1)H NMR spectroscopy, optical absorbance, circular dichroism, and molecular dynamics simulation employing particle mesh Ewald methods. T4MPyP(4+) is one of the largest aromatic molecules for which intercalative binding to DNA...

BACKGROUND Three new analogs of berberine with aryl/ arylalkyl amino carbonyl methyl substituent at the 9-position of the isoquinoline chromophore along with berberrubine were studied for their binding to tRNA(phe) by wide variety of biophysical techniques like spectrophotometry, spectrofluorimetry, circular dichroism, thermal melting, viscosity and isothermal titration calorimetry. METHODOLO...

The interaction between sodium benzoate (SB) and calf thymus DNA in simulated physiological buffer (pH 7.4) using acridine orange (AO) dye as a fluorescence probe, was investigated by UV-Vis absorption, fluorescence and circular dichroism (CD) spectroscopy along with DNA melting studies and viscosity measurements. An expanded UV-Vis spectral data matrix was resolved by multivariate curve resolu...

Five new binuclear Ni (II) complexes [Ni2L ].2ClO4 with various new unsymmetrical binucleating macrocyclic ligands were synthesized by cyclocondensation between N,N’-bis(3-formyl-5-methylsalicylidene) alkane/benzene/naphthalene-diimines (PC1-3 and 2,3-diamino -pyridine in the presence of Nickel (II) acetate and Nickel (II) perchlorate (1:1:1:1 molar ratio). Characterisation of these complexes w...

Two new crescent-shaped unsymmetrical cyanine dyes have been synthesised and their interactions with DNA have been investigated by different spectroscopic methods. These dyes are analogues to a minor groove binding unsymmetrical cyanine dye, BEBO, recently reported by us. In this dye, the structure of the known intercalating cyanine dye BO was extended with a benzothiazole substituent. To inves...

PURPOSE The study on the interaction between small molecules and DNA has been very useful for investigating the structure and physical properties of DNA, elucidating the damage mechanism of DNA and significant in the design of new drugs targeted to DNA. This article describes an interaction of native calf thymus DNA (ctDNA) with a new 3, 4-dihydropyrano[c]chromene derivative, 2-amino-4-(4- chlo...

A new anthracycline derivative, anthracene-9-imidazoline hydrazone (9-AIH), was synthesized and selected as an antitumor ligand to afford a copper(II) complex of 9-AIH, cis-[Cu(II)Cl2(9-AIH)] (1). Complex 1 was structurally characterized by IR, elemental analysis, ESI-MS and single crystal X-ray diffraction analysis. By MTT assay, it was revealed that 1 showed overall a higher in vitro cytotoxi...

A novel ternary Schiff base ligand (HL) of ONO type and its copper (II) complex weresynthesised using 2-aminophenol and o-acetoacetotoluidide. They have been characterised by theusual analytical and spectral methods. The interaction of the complex with calf-thymus (CT)DNA has been investigated by UV-Vis, viscosity measurement, cyclic voltammetry anddifferential pulse voltammetry studies. The re...

New symmetrical acyclic binuclear copper (II) complexes [CuL](ClO4)2 1 and 2 were synthesized by template method, from bicompartmental ligand 2,6-bis((E)-(2-(2aminoethylamino)ethylimino)methyl)-4-methylphenol (L) and 2-((7E)-(2-((Z)-2-((naphthalen-1-yl) methyleneamino)ethylamino)ethylimino)methyl)-6-((9E)-(2-((Z)-2-((naphthalen-1-yl)methyleneamino) ethylamino)ethylimino) methyl)-4-methylphenol ...