Assembly of two low-dimensional coordination polymers from Ag(I) and Cd(II) and 2,3-bis(2-pyridyl)pyrazine

摘要

Polydentate nitrogen heterocycle ligand 2,3-bis(2-pyridyl) pyrazine (2,3-dpp) reacted with M(NO3)(x) (M = Ag, x = 1; M= Cd, x = 2) to give two new complexes [Ag(2,3-dpp)(NO3)](2) (1) and [Cd(2,3-dpp)(NO3)(2)](n) (2). Both complexes have been characterized by single-crystal X-ray diffraction, elemental analyses, IR and H-1 NMR spectroscopy. Single-crystal X-ray analyses showed that complex 1 crystallized in monoclinic, space group P2(1) is a dimmer containing penta-coordinated Ag+ ion. While compound 2 has 1D chain-like structure with repeat unit Cd(2,3-dpp)(NO3)(2), in which the Cd(II) presents octa-coordinated N4O4 donor set with two four-membered chelating rings and two five-membered chelating rings around Cd(II) ion. Meanwhile, every neutral chain [Cd(2,3-dpp)(NO3)(2)] n is mutually connected by face-to-face pi center dot center dot center dot pi packing interactions to form a two dimensional layer. Furthermore, antibacterial activities of compound 1 and luminescent property of the compound 2 are also investigated.