Cyclometalated iridium(III) complex of 6-hydroxydipyrido[3,2-a:2′,3′-c]phenazine: synthesis, and acid-base and avid DNA binding properties

2011 ◽  
Vol 25 (7) ◽  
pp. 521-529 ◽  
Author(s):  
Yan-Min Chen ◽  
An-Guo Zhang ◽  
Ke-Zhi Wang
Keyword(s):  
Dna Binding ◽  
Acid Base ◽  
Binding Properties ◽  
Dna Binding Properties

Synthesis, and Acid–Base and DNA-Binding Properties of a Thiophen-Appended Ruthenium Complex

2011 ◽  
Vol 64 (2) ◽  
pp. 206 ◽  
Author(s):  
Hong Luo ◽  
Zhi-Ping Wang ◽  
An-Guo Zhang ◽  
Ke-Zhi Wang
Keyword(s):  
Dna Binding ◽  
Density Functional ◽  
Ruthenium Complex ◽  
Theoretical Calculations ◽  
Ionization Constants ◽  
Acid Base ◽  
Binding Properties ◽  
Emission Quenching ◽  
Melting Experiments ◽  
Dna Binding Properties

2-(5-Phenylthiophen-2-yl)-1H-imidazo[4,5-f][1,10]phenanthroline (Hptip) and its RuII complex [Ru(bpy)2(Hptip)](PF6)2 (where bpy = 2,2′-bipyridine) have been synthesized and characterized by elemental analysis, 1H NMR spectroscopy, and mass spectrometry. The acid–base properties of the complex were studied by UV-visible and luminescence spectrophotometric pH titrations, and ground- and excited-state acidity ionization constants were derived. The DNA-binding properties of [Ru(bpy)2(Hptip)](PF6)2 were also investigated by means of UV-vis and emission spectroscopy, salt effects, steady-state emission quenching by [Fe(CN)6]4–, DNA competitive binding with ethidium bromide, DNA melting experiments, and viscosity measurements. Density functional theoretical calculations were also carried out in order to understand the DNA binding properties.

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