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Abstract: A novel 3-D inorganic open-framework containing unusual heptanuclear quasi-supertetrahedra, Cd7I12S·3H2O (1), was obtained by hydrothermal reaction and structurally characterized. Optical absorption spectrum reveals that the presence of an optical gap of 2.26eV, indicating that compound 1 is a semiconductor. [Copyright &y& Elsevier]

A 1D solvent-free energetic coordination polymer [Zn 3 (μ 3 -OH) 2 (att) 4 ] n 1 (Hatt = 4-amino-1,2,4-triazole-5-thiol) was obtained and structurally characterized. Compound 1 displays competitive energetic performance and low mechanical sensitivity, which demonstrates 1 has the potential application in insensitive energetic material. [Display omitted] • A new 1D solvent-free energetic coordination polymer [Zn 3 (μ 3 -OH) 2 (att) 4 ] n 1 (Hatt = 4-amino-1,2,4-triazole-5-thiol) was obtained. • The energetic polymer 1 possesses high enthalpy of formation, low mechanical sensitivity and relatively high decomposition temperature. • This work provides an effective method for increasing the oxygen content of energetic compounds. It is a challenge to increase the oxygen content with maintaining the mechanical sensitivity of the energetic materials. In this work, the 1D solvent-free energetic coordination polymer [Zn 3 (μ 3 -OH) 2 (att) 4 ] n 1 (Hatt = 4-amino-1,2,4-triazole-5-thiol) was obtained in alkaline solution through a simple hydrothermal reaction. The X -ray crystallographic analysis indicates that there are two hydroxyl ions embedded in the three Zn(II) atoms through strong coordination bonds, which can provide a strategy for improving the oxygen content of energetic compounds. In addition, the energetic polymer 1 possesses high enthalpy of formation (2012.700 kJ·mol−1), low mechanical sensitivity (IS > 40 J, FS > 360 N) and relatively high decomposition temperature (235 °C). These results demonstrate that compound 1 has the potential application in insensitive energetic material. [ABSTRACT FROM AUTHOR]

Abstract: The reaction of double betaine ligand L1 (L1 =1,3-bis(pyridinio-4-carboxylato)-propane) with Cu(ClO4)2 and Cu(NO3)2, respectively, afforded two novel anion-directed coordination polymers with different open frameworks. The structure of [Cu3(L1)2(OH)2(H2O)2](ClO4)4·2H2O 1 is a unique 3-D open-framework with large S-shape channels, while [Cu3(L1)2(OH)2(H2O)2](NO3)4·2H2O 2 has a 2-D tubular structure. There exist inorganic copper-oxo chains [Cu3(μ3–OH)2(μ2–H2O)2] n in both 1 and 2 as secondary building units, in which the [Cu3O4] cores exhibit a rarely observed chair-like configuration. The anion template of and , and labile coordination orientation of L1 ligand prompt the formation of different polymeric networks in 1 and 2. [Copyright &y& Elsevier]

Abstract: Two silver(I) complexes, [Mg(H2O)6][Ag2(HL)2] (1) and Sr2Ag4(HL)(H2O)14 ·2H2O (2) (H3L=5-sulfo-salicylic acid), have been synthesized by use of alkaline-earth metals (Mg2+ and Sr2+, respectively) as templates. Single-crystal X-ray diffractions reveal that compound 1 is a 1-D chain polymer built from [Ag2(HL)2] dimers and compound 2 is a 2-D framework constructed from unusual tetramer units of [Ag2(HL)2] dimers. The two complexes are both further linked into 3-D networks by the extensive intermolecular hydrogen bonding interactions. [Copyright &y& Elsevier]

Abstract: The first structurally characterized orotato samarium(III) complex, [Sm2(HL)2(ox)(H2O)2] n ·2.5nH2O (1), with a novel bi-layered structure has been synthesized and structurally characterized by X-ray crystallography, in which orotic acid ligands exhibit two coordination modes of μ3-η2κO,O′:η2κO′,N:η1κ″ and μ4-η2κO,O′:η2κO′,N:η1κ″:η1κO‴ for HL2− with the latter being novel coordination mode. The temperature dependence of the magnetic susceptibilities of the title complex reveals that the title complex follow the Curie–Wiess paramagnetic behavior down to 5K. The title complex exhibits strong luminescent emissions based on the f–f transitions of Sm(III) ion and 4G5/2 lifetime. [Copyright &y& Elsevier]

Abstract: The first basket weave framework topology of Sm–Ni heterometallic complex with picolinic acid as bridging ligand showing two different coordination modes of picolinic acid has been characterized; The studies on temperature-dependent magnetization indicate the title complex follows the Curie–Wiess paramagnetic behavior down to 5K. [Copyright &y& Elsevier]