Strong optical limiting (OL) capability of the two-dimensional network cluster polymer [MoS4Cu6I4(py)4]n

Abstract

The two-dimensional network compound [MoS₄Cu₆I₄(py)₄]_n is the first example of a cluster polymer showing very large optical limiting effects; its nonlinear absorptive index α₂ and nonlinear refractive value n₂ are 1.5 × 10^–9 m W^–1 and –2.5 × 10^–17 m² W^–1, respectively, in 6.5 × 10^–5 mol dm^–3 DMSO solution; the optical limiting threshold was determined to be 0.6 J cm^–2, which is about three times better than that of C₆₀.