Silver coordination polymers and networks based on O- or S-heterocyclic linking ligands:: [AgL21](PF6), [Ag2L32](PF6)2, [Ag2L32](ClO4)2, [Ag2L22](BF4)2, and [Ag2L2(NO3)2] (L1=1,2-bis(thiophen-2-ylmethylene)hydrazine;: L2=1,2-bis(furan-2-ylmethylene)hydrazine)

Five silver compounds [AgL21](PF6) (1), [Ag2L32 PF6)(2) (2), [Ag2L32)(ClO4)(2) (3), [Ag2L22](BF4)(2) (4), and [Ag2L2(NO3)(2)](5) were prepared by layer diffusion (dichloromethane-methanol), where L-1 is 1,2-bis(thiophen-2-ylmethylene)hydrazine and L-2 is 1,2-bis(furan-2-ylmethylene)hydrazine. Compound 1 is a discrete compound. Whereas compounds 2 and 3 form 2D networks by van der Waals contacts, compounds 4 and 5 are a 1D and a 2D coordination polymer, respectively, formed by covalent bonds. In particular, compound 5 exhibited blue-green photoluminescence at room temperature in the solid state. (c) 2007 Elsevier Ltd. All rights reserved.