期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 81, 期 1, 页码 128-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2011.05.069
关键词
Ruthenium(II) complexes; Schiff base; Spectroscopy; Crystal structure; DNA binding
类别
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education. Science and Technology [2010-0018365, 2011-0002262]
- Council for Scientific and Industrial Research (CSIR), New Delhi [21(0745)/09/EMR-II]
Reactions of 2-hydroxy-benzoic acid [1-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-ethylidene]hydrazide (H2L) with [RuHCl(CO)(EPh3)(3)] (E = P or As) were carried out and the new complexes obtained were characterized by elemental analysis, electronic, IR, H-1 NMR and C-13 NMR spectroscopic techniques and single crystal X-ray diffraction studies. Complex (1) crystallizes in the monoclinic space group P2(1)/c with unit cell dimensions a = 18.6236(17) angstrom, b = 12.8627(12) angstrom, c = 21.683(2) angstrom, alpha = 90.00, beta = 114.626(2), gamma = 90.00 V = 4721.8(8) angstrom. Z = 4. The crystal structure of the complex shows Ru(II) atom is six-coordinated, forming a slightly distorted octahedral geometry with two P atoms in axial positions, and three chelating donor atoms of the tridentate Schiff base ligand and one carbonyl group located in the equatorial plane. The molecular structure is stabilized by intramolecular O-H center dot center dot center dot N interactions. No intermolecular hydrogen bond was observed. The intramolecular hydrogen bond exists between the oxygen atom from salicylic acid moiety and nitrogen from the same moiety. A variety of solution studies were carried out for the determination of DNA binding mode of the complexes. The results suggest that both complexes bind to Herring sperm DNA via non intercalative mode. (C) 2011 Elsevier B.V. All rights reserved.
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