Diamine derivative of a ruthenium(II)-polypyridyl complex for chemodosimetric detection of nitrite ion in aqueous solution
作者:Amrita Ghosh、Priyadip Das、Sukdeb Saha、Tanmay Banerjee、Harshad B. Bhatt、Amitava Das
DOI:10.1016/j.ica.2011.01.066
日期:2011.6
Nitrite is quite an abundant anion in the environment. It, however, becomes toxic to human life, as well as aquatic animals when present above the permissible concentration level. We have reported here a Ru(II)-polypyridyl-based complex (1) for chemodosimetric detection of nitrite ion in aqueous solution. Formation of the new triazole based complex, generated by reaction of 1 and N2O3, is ascertained by comparing its properties with a presynthesised triazole complex. (C) 2011 Elsevier B. V. All rights reserved.
Synthesis, characterization, DNA-binding and DNA-photocleavage studies of [Ru(bpy)2(pmip)]2+ and [Ru(phen)2(pmip)]2+ (pmip=2-(2′-pyrimidyl)imidazo[4,5-f][1,10]phenanthroline
作者:Shuo Shi、Tian Xie、Tian-Ming Yao、Chao-Ran Wang、Xiao-Ting Geng、Dan-Jing Yang、Lin-Jie Han、Liang-Nian Ji
DOI:10.1016/j.poly.2009.02.035
日期:2009.5
Two new Ru(II) complexes, [Ru(bpy)(2)(pmip)](2+) (1) and [Ru(phen)(2)(pmip)](2+) (2), have been synthesized and characterized by elemental analysis, ESI-MS and H-1 NMR spectra. Their DNA-binding properties were studied by means of UV-VIS, emission and CD spectra, thermal denaturation and viscosity measurements as well as their DNA-photocleavage properties. The experimental results show that both 1 and 2 can bind to DNA in an intercalative mode; the DNA-binding affinity of 2 is greater than that of 1, which suggests that the ancillary ligands have a significant effect on the spectroscopic properties and DNA-binding behavior of the Ru(II) complexes. Under irradiation with UV light, the Ru(II) complexes show excellent efficiency of cleaving DNA. This research may provide valuable insight into the interactions of metal complexes with DNA, knowledge that is an excellent backdrop for the rational design of promising drugs. (C) 2009 Elsevier Ltd. All rights reserved.