Synthesis, structure and optical limiting effect of a novel inorganic–organic hybrid polymer containing mixed chains of copper(I)/iodine

In this paper, treatment of N-ethyl-benzo[f]quinolium (ebq) iodide and CuI with excess KI afforded an unusual coordination polymer [(ebq) 2(Cu 3I 4)(CuI 2)] n ( 1). 1 crystallizes in tetragonal system, space group P4(2) bc with cell parameters of a = 23.2040 ( 6 ) Å , c = 6.7393 ( 3 ) Å , V = 3628.6 ( 2 ) Å 3 , Z = 8 , D c = 2.622 g / c 3 , R 1 = 0.0447 and w R 2 = 0.0974 . A highly interesting feature of 1 is its presence of mixed types of chains [ ( Cu 3 I 4 ) n - and ( CuI 2 ) n - chain] in one crystal lattice based on supramolecular self-assembly directed by cations. The infinite chains ( Cu 3 I 4 ) n - and ( CuI 2 ) n - in 1 could be described as the edge-sharing arrangement of CuI 4 tetrahedron. Furthermore, IR, EA, UV–Vis, thermal analysis and optical limiting measurements were adopted to characterize polymer 1. The optical limiting experiment shows that the present polymer exhibits a large optical limiting capacity. An unusual coordination polymer [(ebq) 2(Cu 3I 4)(CuI 2)] n ( 1) has been synthesized and characterized. A highly interesting feature of 1 is its presence of mixed types of chains [ ( C u 3 I 4 ) n - and ( CuI 2 ) n - chain] in one crystal lattice based on supramolecular self-assembly directed by cations. The infinite chains ( Cu 3 I 4 ) n - and ( CuI 2 ) n - in 1 could be described as the edge-sharing arrangement of CuI 4 tetrahedron. The optical limiting experiments show that the present polymer exhibits a large optical limiting capacity.