摘要
The Rh(III) complexes of 1-alkyl-2-(arylazo)imidazoles (RaaiR′), [Rh(X) 2 (RaaiR′) 2 ](ClO 4 ) (R = H (1, 3), Me (2, 4); R′ = Me (a), Et (b), CH 2 Ph (c); X = Cl (1, 2), N 3 (3, 4)), are synthesized and characterized by spectral (IR, UV-Vis, Mass and 1 H NMR) data. The structural confirmation has been done by single crystal X-ray diffraction study of [RhCl 2 (MeaaiEt) 2 ]ClO 4 (2b) (MeaaiEt, 1-ethyl-2-(p-tolylazo)imidazole). The DNA binding of the complexes (binding constant: 0.86 × 10 4 to 1.05 × 10 5 ) have been examined by absorption and fluorescence spectroscopic measurements. The nuclease activity of the complexes are examined by gel-electrophoresis and has revealed the highest activity of [Rh(N 3 ) 2 (RaaiR′) 2 ]ClO 4 . The DFT computation has been performed to the optimized geometry of the complexes to interpret the electronic structures and their spectral properties. © 2012 Elsevier B.V. All rights reserved.