(C 6 H 14 N 2 ){Zn[ZnB 2 P 4 O 15 (OH) 2 ]·(C 6 H 13 N 2 )Cl}: A New Templated Zincoborophosphate
2003; American Chemical Society; Volume: 15; Issue: 26 Linguagem: Inglês
10.1021/cm0311224
ISSN1520-5002
AutoresYa‐Xi Huang, Gerd Schäfer, W. Carrillo‐Cabrera, Horst Borrmann, Raúl Cardoso Gil, Rüdiger Kniep,
Tópico(s)Polyoxometalates: Synthesis and Applications
ResumoColorless crystals of (C6H14N2){Zn[ZnB2P4O15(OH)2]·(C6H13N2)Cl} (1) were prepared from mixtures of ZnCl2, B2O3, diaza-bicyclo[2.2.2]octane (DABCO), and 85% H3PO4 under mild hydrothermal conditions (170 °C). The crystal structure was determined by single-crystal X-ray diffraction (monoclinic, P21/c (No. 14), a = 1704.3(1) pm, b = 937.03(5) pm, c = 1619.75(8) pm, β = 96.894(3)°, Z = 2). The crystal structure contains tetrahedral zigzag ribbons, {[ZnB2P4O15(OH)2]4-}, running along [010]. Additional ZnO2NCl tetrahedra at the borders complete the ribbons by sharing common O-corners with the zincoborophosphate polymer. The nitrogen atoms of the quaternary ZnO2NCl tetrahedra belong to monoprotonated (HDABCO)+ ions. A second (diprotonated) species, (H2DABCO)2+, acts as a pure template and is fixed to adjacent zincoborophosphate ribbons along [100] via hydrogen bonds. The title compound 1 can be described as an adduct of (C6H14N2){Zn[ZnB2P4O15(OH)2]} with diaza-bicyclo[2.2.2]octane-hydrochloride. Thermoanalytical and X-ray powder diffraction investigations to high temperatures (740 °C) show the decomposition of 1 and the formation of a NH4[ZnBP2O8] polymorph as an intermediate.
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