Syntheses, Crystal Structures and Third-order Nonlinear Optical Properties of Coordination Polymers {[Et4N][Ag2I3]}n and [CuBr(C10H8N2S2)

Abstract

Coordination polymers {[Et4N][Ag2I3]} n (1) and [CuBr(C10H8N2S2)] n (2) were prepared by standard Schlenk techniques. Their X-ray measurements indicate that polymer (1) crystallizes in the orthorhombic space group Pnma, and polymer (2) crystallizes in the monoclinic space group P21/n. Complex (1) has a hanging ladder-like polymeric chain which can also be described as a helical chain bridged by Ag–Ag edges. Complex (2) exhibits a monoclinic crystal system with a slightly distorted tetrahedron. The nonlinear optical (NLO) properties of (1) and (2) were investigated by using Z-scan techniques with an 8 ns pulsed laser at 532 nm. These two coordination polymers exhibit NLO absorption and an effective self-focusing effect. The effective α2 and n2 values of cluster (1) are 3.04×10−11 m W−1 and 7.6×10−18 m2 w−1 and the effective α2 and n2 values of compound (2) are 1.08×10−11 m W−1 and 3.1×10−18 m2 w−1 when measured in CH2Cl2 solution.