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A novel three-dimensional barium metal-organic framework [Ba3(btc)2(H2O) 4 ]·0.5H2O (H3btc = 1,3,5-benzenetricarboxylic acid) has been synthesised under hydrothermal conditions, and characterised by single-crystal X-ray structure determination, thermogravimetric analysis, X-ray powder diffraction, IR, and photoluminescence studies. The volume of the tunnel formed by the two-dimensional layers is 341.9 Å3 per unit cell using PLATON based on the crystal structures, comprising 14.3% of the crystal volume 2387.2 Å3. The solid-state fluorescence measurement of this compound at room temperature reveals a fluorescent emission band at 454.5 nm under the excitation of 337 nm, assigned to a charge-transfer transition. [ABSTRACT FROM AUTHOR]

A new Zn(II) phosphonate, (NH4)[Zn(HPMIDA)(H2O)2] (1) (H4PMIDA = N-(phosphonomethyl)iminodiacetic acid), has been solvothermally synthesized and characterized by elemental analysis, IR, TGA fluorescence, and X-ray single-crystal diffraction. Compound 1 is an example of a six-coordinate Zn-carboxylate-phosphonate and possesses a 3-D supramolecular structure built from mononuclear anions [image omitted] through hydrogen bonding. Compound 1 exhibits a solid-state fluorescent emission band at 593 nm under excitation of 413 nm. [ABSTRACT FROM AUTHOR]