The title compound, 2C5H6ClN2+·H2P2O72−, contains infinite (H2P2O72−)n ribbons extending along the c direction. The bridging O atom of the diphosphate anion is located on a twofold axis. The organic cations are anchored between planes parallel to ac, linking the ribbons into a three‐dimensional network.

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A new Co(II)-hexaborate containing [Co{B 6 O 7 (OH) 6 } 2 ] 2-building blocks decorated with 1-cyanopiperazinium organic cation; (C 5 H 11 N 3 )[Co{B 6 O 7 (OH) 6 } 2 ]Á 4H 2 O (1-CPCoB6) was synthesized from aqueous solution and the crystals were grown by the slow evaporation technique and characterized by means X-ray diffraction, IR UV-Vis and fluorescence spectroscopy measurements, elemental analysis and TDA-TG thermal analysis. The powder and single crystal XRD analysis revealed that the isolated pure crystals belong to the triclinic system. The structure exhibits interesting porous 3D-hydrogen-bonded network built by [Co{B 6 O 7 (OH) 6 } 2 ] 2-monomers. The cyanopiperazinium dications are filled in the free void channels of the inorganic framework and interact by means extensive hydrogen bonds. This hydrated mixed hexaborate thermally decomposed in multiple steps involving dehydration and release of organic cation leading to a novel unknown phase which undergoes crystallization. Moreover, the fluorescent and antimicrobial properties of 1-CPCoB6 have also been carried out, showing a red photoluminescence and a promising enhancement of biological activity of reported material in comparison with its parent reactants.Electronic supplementary material The online version of this article (

A novel heteropolyoxometalate, Nb-substituted hexatungstate compound; (C 9 H 8 N) 3 [NbW 5 O 19 ]Á3H 2 O triquinolinium l 6 -oxido-dodeca-l 2 -oxidohexaoxido[niobium(V)pentatungsten(VI)]ate trihydrate (QNbW5) has been grown by slow evaporation method and characterized by powder X-ray and single-crystal XRD methods, NMR, IR, UV-Vis and photoluminescence spectroscopy measurements, elemental analysis and thermogravimetric analysis. Single-crystal XRD analyses show that QNbW5 crystallizes in the triclinic space group P1 and its crystal structure consists of 3D grid-like network of components in a close connection through N-HÁÁÁO, C-HÁÁÁO and offset pÁÁÁp stacking interactions between neighboring rings of quinolinium moieties. Moreover, the spectroscopic and electronic properties of QNbW5 have also been investigated showing a considerable important gap energy well confirming the semiconductor behavior and the blue photoluminescent property of reported material. In addition, the complex shows promising antimicrobial activity against four pathogenic microbes in comparison with its components alone.Electronic supplementary material The online version of this article (