Abstract
The combination of metal ions with H3tbba has resulted in the formation of two three dimensional coordination compounds {[Zn(H2tbba)2(H2O)] · 2(OC3H6)} n (1) and {[Mn(H2tbba)2(H2O)] · 2(OC3H6)} n (2) (H2tbba = 2-thiobarbituric acid anion). Compounds 1 and 2 are isostructural with metal ions bridged by four hydroxyl oxygens from four different H2tbba ligands to form a 3D network. H2tbba exhibits bidentate coordination with both hydroxyl oxygens participating in coordination, a new coordination mode. Nonlinear absorption and refraction of 1 and 2 in DMF are studied by using Z-scan measurement technique at 532 nm. 1 and 2 possess nonlinear optical absorption and self-focusing.
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