Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 149, Issue -, Pages 150-156Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.04.063
Keywords
Ru(II) complex; Coumarin; DNA-binding; Light switch; Photocleavage
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Funding
- National Natural Science Foundation of China [21205039, 21342012]
- Natural Science Foundation of Hunan Province [13JJ6071, 14JJ7073]
- Undergraduate Innovative Training Center in Hunan province (Materials Science and Engineering) [15YCZD02]
- construct program of the key discipline in Hunan province (Applied Chemistry)
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A new ligand mhcip (mhcip = 2-(4-methyl-7-hydroxyl-8-coumarinyl)imidazo[4,5-f]-[1,10]phenanthroline) and its ruthenium complexes, [Ru(L)(2)mhcip](2+) (L = bpy (2,2'-bipyridine), phen (1,10-phenanthroline)), have been synthesized and characterized. The introduction of coumarin ring may play an important role in the strong fluorescence of the complexes. Intercalative binding mode between both complexes and CT-DNA was determined by UV-visible spectroscopy, fluorescence spectroscopy and viscosity measurements. The two complexes show efficient DNA photocleavage under irradiation at 365 nm. The cycling of light switch off and on has been achieved for both complexes through the introduction of Cu2+ and EDTA in the absence or presence of DNA. (C) 2015 Published by Elsevier B.V.
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