A series of ternary copper(II)-1,10-phenanthroline complexes with glycine and methylated glycine derivatives, [Cu(phen)(aa)(H(2)O)]NO(3)·xH(2)O 1-4 (amino acid (aa): glycine (gly), 1; DL: -alanine (DL: -ala), 2; 2,2-dimethylglycine (C-dmg), 3; sarcosine (sar), 4), were synthesized and characterized by FTIR, elemental analysis, electrospray ionization-mass spectra (ESI-MS), UV-visible spectroscopy and molar conductivity measurement. The determined X-ray crystallographic structures of 2 and 3 show each to consist of distorted square pyramidal [Cu(phen)(aa)(H(2)O)](+) cation, a nitrate counter anion, and with or without lattice water, similar to previously reported structure of [Cu(phen)(gly)(H(2)O)]NO(3)·1½H(2)O. It is found that 1-4 exist as 1:1 electrolytes in aqueous solution, and the cationic copper(II) complexes are at least stable up to 24 h. Positive-ion ESI-MS spectra show existence of only undissociated [Cu(phen)(aa)](+) species. Electron paramagnetic resonance, gel electrophoresis, fluorescence quenching, and restriction enzyme inhibition assay were used to study the binding interaction, binding affinity and selectivity of these complexes for various types of B-form DNA duplexes and G-quadruplex. All complexes can bind selectively to DNA by intercalation and electrostatic forces, and inhibit topoisomerase I. The effect of the methyl substituents of the coordinated amino acid in the above complexes on these biological properties are presented and discussed. The IC(50) values (24 h) of 1-4 for nasopharyngeal cancer cell line HK1 are in the range 2.2-5.2 μM while the corresponding values for normal cell line NP69 are greater than 13.0 μM. All complexes, at 5 μM, induced 41-60 % apoptotic cell death in HK1 cells but no significant cell death in NP69 cells.

A catalyst-free and environmentally friendly process was employed for the production of biodiesel from sea mango seed oil. This oil is non-edible and contains several fatty acids such as palmitic acid (C16), trans-9-elaidic acid (C18:1t), oleic acid (C18:1), linoleic acid (C18:2), and linolelaidic acid (C18:2n6t). The in situ extraction and transesterification of the oil were carried at the subcritical methanol-water condition. The effect of reaction temperature and time on the yield of biodiesel was studied. The maximum yield of biodiesel was 98.58% and achieved at 200 °C, 40 bar and reaction time of 6 h. The ratio among sea mango seed, methanol, and water was 2:10:1.

Abstract:A new Schiff base 4-[(pyridin-3-ylmethylene)amino]phenyldodecanoate was synthesized via Steglich esterification. IR, 1 H NMR, 13 C NMR and MS spectroscopic data are presented.

Three organotin(IV) carboxylate complexes derivatives of 2-methyl-3-nitrobenzoic acid (HL) have been successfully synthesized and characterized quantitatively and qualitatively. The complexes obtained are screened for their preliminary in vitro cytotoxic assay on human liver hepatocellular carcinoma cells (HepG2) and antibacterial screening activity. Results of the infrared and NMR spectroscopy on the acid and complexes showed that the coordination took place via oxygen atoms from the carboxylate anions. With the exceptional case, based on the spectroscopy studies indicated that one methanol molecule also take part in the coordination to tin(IV) atom moiety in complex 3 resulting the tin(IV) atom exhibited five coordination in solid state. From the preliminary in vitro cytotoxic assay on HepG2 and antibacterial screening activity, triphenyltin(IV) (complex 3) showed slightly better activity compared to diorganotin(IV) complexes (1 and 2).

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.002 Å; R factor = 0.024; wR factor = 0.060; data-to-parameter ratio = 33.5.In the title complex, [Sn(C 6 H 5 ) 3 (C 7 H 3 ClNO 4 )(CH 4 O)], the five-coordinate Sn IV atom exists in a trigonal-bipyramidal environment, formed by a monodentate carboxylate group, three phenyl rings and a methanol molecule. The axial sites are occupied by the O atoms of the methanol molecule and the carboxylate group, while the equatorial plane is formed by the C atoms of three phenyl rings. The benzene ring of the 2-chloro-4-nitrobenzoate ligand makes dihedral angles of 66.18 (7), 74.71 (7) and 77.39 (7) with respect to the three phenyl rings. In the crystal, the molecules are linked via intermolecular O-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds into a column along the b axis. Related literature