Abstract
The one-dimensional linear polymer W-Se-Ag compound {[Et4N][(mu-WSe4)Ag]}(n) (1) was obtained from the reaction of [Et4N](2)[WSe4] and AgNO3 in a mixed solvent, MeCN/DMF (1: 10). Treatment of a solution of I in Me2SO with Ln(NO3)(3) center dot 6H(2)O resulted in the formation of a helical chain polymer compound {[Ln(Me2SO)(8)][(mu(3)-WSe4)(3)Ag-3]}(n) (Ln = Pr 2, Er 3). The solid-state structures of the three polymer compounds 1, 2, and 3 have been established by X-ray crystallography. The third-order non-linear optical properties of the linear polymer compound 1 were determined by z-scan techniques with 7 ns pulses at 532 nm. (c) 2007 Elsevier Ltd. All rights reserved.