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Abstract: Luminescent CuInS2 nanocrystals have been synthesized in dodecanethiol using air-stable precursors. The nanocrystals were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The optical properties of the CuInS2 nanocrystals can be controlled by changing the reaction conditions, such as reaction time, temperature, and addition of ligands. It was found that the steady-state photoluminescence spectrum of the close-packed CuInS2 nanocrystals on glass substrate peaked at longer wavelength than that of the colloidal ones and the close-packed nanocrystals possessed a shorter luminescence decay time. This behavior was explained on the basis of Förster resonant energy transfer due to the shorter distance between nanocrystals on substrate. [Copyright &y& Elsevier]

Three ZnII and CdII complexes with Y-shaped dicarboxylate ligands, namely [Zn(L1)(2,2′-bpy)2(H2O)] ·2H2O ( 1), [Zn(L1)(bpp)(H2O)] ( 2), and [Cd(L1)(H2O)] ·H2O ( 3) [H2L1 = N-phenyliminodiacetic acid, 2,2′-bpy = 2,2′-bipyridine, bpp = 1,3-bis(4-pyridyl)propane] were synthesized and characterized by elemental analysis, IR spectroscopy single-crystal X-ray diffraction, and thermogravimetric analyses. Compound 1 shows an hydrogen-bonded 2D network, whereas compound 2 is an infinite 1D wavy chain structure, though O-H ···O hydrogen-bonded to form a 2D network. Compound 3 displays a 2D uninodal 3-connected Shubnikov plane net with the point symbol of (4.82). Moreover, the solid-state such as thermal stabilities and fluorescence properties of 1- 3 were also investigated. [ABSTRACT FROM AUTHOR]

Two new coordination polymers, namely, [Zn(bdc)(mbix)] n ( 1) and {[Cd2(bdc)2(mbix)2] ·H2O} n ( 2) [H2bdc = 5-hydroxylisophthalic acid, mbix = 1,3-bis(imidazol-1-yl-methyl)benzene], were obtained under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, as well as powder- and single-crystal X-ray diffraction. Compound 1 exhibits a 2D puckered layer with (4,4) topology, which is further interconnected by hydrogen bonding interactions leading to a 3D supramolecular architecture. Compound 2 features a 5-connected 3D network with bnn (46.64) topology based on the dinuclear CdII subunits. In addition, solid-state properties such as thermal stabilities and photoluminescent properties of compounds 1 and 2 were also investigated. [ABSTRACT FROM AUTHOR]