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Abstract: The 1-amino-2-phenylethane-1,1-diphosphonic acid (APhEDPH4) is easily assembled to form two-dimensional (2D) supramolecular layer. It crystallizes from water solution to form hydrated compound APhEDPH4·3H2O (1). By introducing a base bridging ligand 4,4′-bipyridyl (4,4′-bipy), another supramolecular compound (APhEDPH3)2·(4,4′-bipyH2) (2) is obtained. Both of them were characterized by X-ray diffraction (XRD), elemental analysis (EA), infrared spectrometry (IR), thermogravimetric analysis (TGA) and single crystal X-ray diffraction. In compound 1, APhEDPH4 molecules form 2D supramolecular layers and extend to 2D sandwich type supramolecular architecture with the existence of water molecules. Whereas, compound 2 contains 2D supramolecular layers constructed by anions, and shows a three-dimensional (3D) tessellate-type supramolecular structure via the bridging effect of . Compound 2 shows intense blue photoluminescence with when excited by ultraviolet ray. The effect of bridged ligand on the dimensions of the final product is also discussed. [Copyright &y& Elsevier]

Abstract: The homometal cluster [Fe(DMF)6][W2(μ2-S)2S4] 1 (DMF=dimethylformamide) was successfully synthesized by low-temperature solid-state reactions. X-ray single-crystal diffraction studies reveal that compound 1 is dinuclear anion cluster. The compound was characterized by elemental analyses, IR spectra and UV–vis spectra. The third-order non-linear optical (NLO) properties of the cluster were also investigated and exhibited non-linear rare saturation absorption (α 2 <0) and self-defocusing performance with modulus of the hyperpolarizabilities 9.547×10−31 esu for 1. [Copyright &y& Elsevier]

Abstract: The heterometallic cluster [WM2S4(Pph3)3]·DMF (M2=1.25Ag+0.75Cu) 1 has been synthesized by low-temperature solid-state reaction. Single crystal X-ray analyses reveal that compound 1 possesses a linear skeleton with a W center slightly distorted from the tetrahedron. The compound was characterized by elemental analyses, IR spectra and UV–visible spectra. The third-order nonlinear optical (NLO) properties were also investigated and they exhibit nice nonlinear absorption and self-defocusing performance with modulus of the hyperpolarizability 9.8×10−30esu for 1. [Copyright &y& Elsevier]

A novel copper(II) thiocyanate complex [Cu(im)2(NCS)2] 1 (im=imidazole) has been prepared and characterized by spectroscopic analysis and crystallographic method. This supramolecular compound exhibits a three-dimensional solid state structure constituted by N–H⋯S hydrogen bonds and π–π stacking interactions. The compound in DMF solutions has a very strong third-order non-linear optical (NLO) behavior with absorption coefficient and refractive index α2=1.18×10−11 m w−1, n2=−9.00×10−16 m2 w−1, respectively, and third-order NLO susceptibility χ(3) of 7.00×10−10 esu. [Copyright &y& Elsevier]