Study on a luminol-based electrochemiluminescent sensor for label-free DNA sensing.

Automatic, inexpensive, simple and sensitive methods for DNA sensing and quantification are highly desirable for biomedical research. The rapid development of both the fundamentals and applications of electrochemiluminescence (ECL) over the past years has demonstrated its potential for analytical and bio-analytical chemistry. This paper reports the quenching effect of DNA on the ECL of luminol and the further development of a DNA sensing device.

A polymeric ladder complex: catena-poly[[[micro-4,4'-bipyridyl-bis[aqua(p-aminobenzoato)copper(II)]]-di-mu-4,4'-bipyridyl] dinitrate tetrahydrate].

The title polymeric ladder complex, [[Cu(2)(C(7)H(6)NO(2))(2)(C(10)H(8)N(2))(3)(H(2)O)(2)](NO(3))(2).4H(2)O](n), has been synthesized and spectroscopically characterized. The polymeric nature of the compound involves two non-equivalent 4,4'-bipyridyl ligands acting as almost orthogonal bridges joining the metal coordination Jahn-Teller-distorted octahedra, and forming ladders packed under the influence of hydrogen bonds involving the uncoordinated amino group of the p-aminobenzoate ligand, the NO(3)(-) anion and the water molecules.