Novel pb and zn coordination polymers: synthesis, molecular structures, and third-order nonlinear optical properties.

TLDR: It is deduced that the valence shell structures of metal ions may have some influence on the strength of N LO properties, and the relationships between the crystal structures of coordination polymers and the observed NLO properties are discussed.

Abstract: Three novel coordination polymers [Pb(bbbm)2(NO3)2]n (bbbm = 1,1‘-(1,4-butanediyl)bis-1H-benzimidazole) 1, [Zn(bbbt)(NCS)2]n (bbbt = 1,1‘-(1,4-butanediyl)bis-1H-benzotriazole) 2, and [Zn(pbbt)(NCS)2]n (pbbt = 1,1‘-(1,3-propylene)bis-1H-benzotriazole) 3 were synthesized and structurally characterized. Polymer 1 exhibits a two-dimensional rhombohedral grid network structure, the dimensions of the grid are 14.274 × 14.274 A, and the diagonal-to-diagonal distances are 24.809 × 14.125 A. Polymer 2 possesses a concavo-convex chain structure different from those of the known one-dimensional polymers, which are linear chain, zigzag chain, helical chain, double-stranded chain, and ladder chain. Polymer 3 exhibits a one-dimensional zigzag chain structure, and these chains were packed as an ...ABAB... layered structure. The third-order nonlinear optical (NLO) properties of polymers 1, 2, and 3 were determined with a 7-ns pulsed laser at 532 nm. 1 shows strong third-order NLO absorptive and refractive properties, and...