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|Title:||Solid state synthesis and self-focusing and nonlinear absorptive properties of two butterfly-shaped clusters WCu2OS3(PPh3)4 and MoCu2OS3(PPh3)3||Authors:||Shi, S.
|Issue Date:||1-Jan-1995||Citation:||Shi, S.,Hou, H.W.,Xin, X.Q. (1995-01-01). Solid state synthesis and self-focusing and nonlinear absorptive properties of two butterfly-shaped clusters WCu2OS3(PPh3)4 and MoCu2OS3(PPh3)3. Journal of physical chemistry 99 (12) : 4050-4053. ScholarBank@NUS Repository.||Abstract:||The title compounds WCu2OS3(PPh3)4 (I) and MoCu2OS3 (PPh3)3 (II) were synthesized by reactions of (NH4)2 MO2S2 (M = W, Mo), Cu2S, and PPh3 in the solid state for nonlinear optical studies. A wide transparent window (λ = 400 approximately 1000 nm) was observed for both clusters, which makes them attractive for nonlinear optical applications. Nonlinear optical (NLO) properties of the clusters were studied with a 7-ns pulsed laser at 532 nm. Cluster I exhibits mainly optical self-focusing (n2 = 8 × 10-18 m2 W-1, as measured with an 1.2 × 104 mol dm-3 acetonitrile solution) with negligibly small nonlinear absorption. Cluster II exhibits both optical self-focusing (n2 = 5 × 10-17 m2 W1, as measured with a 7.4 × 10-5 mol dm-3 acetonitrile solution and optical nonlinear absorption (α2 = 2.6 × 10-10 m W-1). The third-order NLO susceptibilities (χ(3) o the two clusters at the above-mentioned concentrations are 2 × 10-11 esu for I and 1.2 × 10-10 esu for II respectively. These nonlinear optical properties of the clusters were compared with those of cubic cage shaped and nest-shaped clusters to reveal a qualitative structure/NLO property correlation.||Source Title:||Journal of physical chemistry||URI:||http://scholarbank.nus.edu.sg/handle/10635/91700||ISSN:||00223654|
|Appears in Collections:||Staff Publications|
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